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Impressum CHANGELOG.md
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# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog]( https://keepachangelog.com/en/1. 0. 0/),
and this project adheres to [Semantic Versioning]( https://semver.org/spec/v2.0. 0.html) .
## Guideline to update the version
Increment the:
* MAJOR version when you make incompatible API/ABI changes,
* MINOR version when you add functionality in a backwards compatible manner, and
* PATCH version when you make backwards compatible bug fixes.
## [Unreleased]
## [1.27.0] 2026-05-13
* [RELEASE] Bump main branch to 1.27.0-dev
[#3947](https://github.com/open-telemetry/opentelemetry-cpp/pull/3947)
* [CODE HEALTH] Fix clang tidy warnings in API `common` and `context`
[#3948](https://github.com/open-telemetry/opentelemetry-cpp/pull/3948)
* Bump github/codeql-action from 4.33.0 to 4.34.1
[#3949](https://github.com/open-telemetry/opentelemetry-cpp/pull/3949)
* [CODE HEALTH] Fix more clang-tidy warnings in sdk
[#3951](https://github.com/open-telemetry/opentelemetry-cpp/pull/3951)
* [CODE HEALTH] Fix more clang-tidy warnings in api
[#3950](https://github.com/open-telemetry/opentelemetry-cpp/pull/3950)
* [CODE HEALTH] Fix clang-tidy warnings in ext, exporters, and examples
[#3952](https://github.com/open-telemetry/opentelemetry-cpp/pull/3952)
* Bump grpc from 1.78.0 to 1.80.0
[#3955](https://github.com/open-telemetry/opentelemetry-cpp/pull/3955)
* Bump codecov/codecov-action from 5.5.3 to 6.0.0
[#3954](https://github.com/open-telemetry/opentelemetry-cpp/pull/3954)
* Bump github/codeql-action from 4.34.1 to 4.35.1
[#3957](https://github.com/open-telemetry/opentelemetry-cpp/pull/3957)
* Bump step-security/harden-runner from 2.16.0 to 2.16.1
[#3960](https://github.com/open-telemetry/opentelemetry-cpp/pull/3960)
* Bump fossas/fossa-action from 1.8.0 to 1.9.0
[#3961](https://github.com/open-telemetry/opentelemetry-cpp/pull/3961)
* Move implementation from SDK header files to SDK cc
[#3887](https://github.com/open-telemetry/opentelemetry-cpp/pull/3887)
* Bump bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml
[#3962](https://github.com/open-telemetry/opentelemetry-cpp/pull/3962)
* Bump benchmark-action/github-action-benchmark from 1.21.0 to 1.22.0
[#3963](https://github.com/open-telemetry/opentelemetry-cpp/pull/3963)
* [CODE HEALTH] Fix clang-tidy param-not-moved in otlp grpc exporters
[#3956](https://github.com/open-telemetry/opentelemetry-cpp/pull/3956)
* Enable WITH_OTLP_RETRY_PREVIEW by default
[#3953](https://github.com/open-telemetry/opentelemetry-cpp/pull/3953)
* Add Doug Barker as maintainer
[#3969](https://github.com/open-telemetry/opentelemetry-cpp/pull/3969)
* [CODE HEALTH] Cleanup nostd variant access for noexcept methods in api and sdk
[#3965](https://github.com/open-telemetry/opentelemetry-cpp/pull/3965)
* chore: update readme
[#3971](https://github.com/open-telemetry/opentelemetry-cpp/pull/3971)
* Adjust emeritus status
[#3972](https://github.com/open-telemetry/opentelemetry-cpp/pull/3972)
* Enable WITH_OTLP_GRPC_SSL_MTLS_PREVIEW by default
[#3970](https://github.com/open-telemetry/opentelemetry-cpp/pull/3970)
* Bump step-security/harden-runner from 2.16.1 to 2.17.0
[#3976](https://github.com/open-telemetry/opentelemetry-cpp/pull/3976)
* Bump actions/github-script from 8.0.0 to 9.0.0
[#3975](https://github.com/open-telemetry/opentelemetry-cpp/pull/3975)
* [SDK] Reduce lock contention in SyncMetricStorage for concurrent metric recording
[#3959](https://github.com/open-telemetry/opentelemetry-cpp/pull/3959)
* [Bazel] Add ENABLE_OTLP_GRPC_SSL_MTLS_PREVIEW define to otlp_grpc_log_record_exporter
[#3988](https://github.com/open-telemetry/opentelemetry-cpp/pull/3988)
* [TEST] Only run the multi_observer_test when building with ABI v2
[#3982](https://github.com/open-telemetry/opentelemetry-cpp/pull/3982)
* [CODE HEALTH] Fix gcc warnings in release maintainer build
[#3984](https://github.com/open-telemetry/opentelemetry-cpp/pull/3984)
* Bump docker/build-push-action from 7.0.0 to 7.1.0
[#3992](https://github.com/open-telemetry/opentelemetry-cpp/pull/3992)
* [CODE HEALTH] Fix clang-tidy misc-use-internal-linkage warnings
[#3985](https://github.com/open-telemetry/opentelemetry-cpp/pull/3985)
* [CODE HEALTH] Fix clang-tidy narrowing conversions in baggage
[#3989](https://github.com/open-telemetry/opentelemetry-cpp/pull/3989)
* [CODE HEALTH] Fix clang-tidy narrowing-conversions warnings in tests
[#3987](https://github.com/open-telemetry/opentelemetry-cpp/pull/3987)
* Bump actions/cache from 5.0.4 to 5.0.5
[#3994](https://github.com/open-telemetry/opentelemetry-cpp/pull/3994)
* [CODE HEALTH] Fix misc clang-tidy warnings
[#3993](https://github.com/open-telemetry/opentelemetry-cpp/pull/3993)
* [TEST] Replace routable IP with RFC 5737 TEST-NET address in curl test
[#4001](https://github.com/open-telemetry/opentelemetry-cpp/pull/4001)
* [TEST] set a maximum thread count for the metrics stress test
[#4003](https://github.com/open-telemetry/opentelemetry-cpp/pull/4003)
* Bump github/codeql-action from 4.35.1 to 4.35.2
[#4005](https://github.com/open-telemetry/opentelemetry-cpp/pull/4005)
* Bump step-security/harden-runner from 2.17.0 to 2.18.0
[#4004](https://github.com/open-telemetry/opentelemetry-cpp/pull/4004)
* [CODE HEALTH] Fix clang-tidy warnings in base2 exponential histogram aggregation
[#3997](https://github.com/open-telemetry/opentelemetry-cpp/pull/3997)
* [CI] Build third-party dependencies in release with ninja
[#3995](https://github.com/open-telemetry/opentelemetry-cpp/pull/3995)
* [CI] Update ci scripts and documentation
[#4000](https://github.com/open-telemetry/opentelemetry-cpp/pull/4000)
* [SDK] Rename parameters in logger_provider
[#4006](https://github.com/open-telemetry/opentelemetry-cpp/pull/4006)
* Enable ENABLE_OTLP_RETRY_PREVIEW for bazel
[#4010](https://github.com/open-telemetry/opentelemetry-cpp/pull/4010)
* [CODE HEALTH] Fix clang-tidy misc-no-recursion warnings
[#4009](https://github.com/open-telemetry/opentelemetry-cpp/pull/4009)
* upgrade bazelisk
[#4015](https://github.com/open-telemetry/opentelemetry-cpp/pull/4015)
* [SDK] Add destructor to PeriodicExportingMetricReader to fix shutdown race
[#4008](https://github.com/open-telemetry/opentelemetry-cpp/pull/4008)
* [CODE HEALTH] Fix clang-tidy narrowing-conversions in sync_instruments
[#4013](https://github.com/open-telemetry/opentelemetry-cpp/pull/4013)
* [CI] Enable Bazel asan and ubsan jobs
[#4014](https://github.com/open-telemetry/opentelemetry-cpp/pull/4014)
* [CI] update code.coverage job to report on all components and preview features
[#4002](https://github.com/open-telemetry/opentelemetry-cpp/pull/4002)
* [OTLP GRPC] Allow user use custom grpc::ChannelArguments
[#3990](https://github.com/open-telemetry/opentelemetry-cpp/pull/3990)
* Bump step-security/harden-runner from 2.18.0 to 2.19.0
[#4016](https://github.com/open-telemetry/opentelemetry-cpp/pull/4016)
* Bump rules_cc from 0.2.17 to 0.2.18
[#4022](https://github.com/open-telemetry/opentelemetry-cpp/pull/4022)
* upgrade opentelemetry-proto to 1.10.0
[#4025](https://github.com/open-telemetry/opentelemetry-cpp/pull/4025)
* [CI] upgrade grpc to 1.80.0 for CMake
[#4026](https://github.com/open-telemetry/opentelemetry-cpp/pull/4026)
* [CONFIGURATION] File configuration - composable samplers
[#3966](https://github.com/open-telemetry/opentelemetry-cpp/pull/3966)
* [CHORE] Fix warnings in publish-to-bcr workflow
[#4032](https://github.com/open-telemetry/opentelemetry-cpp/pull/4032)
* [API] Deprecate opentelemetry::plugin
[#4021](https://github.com/open-telemetry/opentelemetry-cpp/pull/4021)
* [CI] remove old protobuf vcpkg port files
[#4029](https://github.com/open-telemetry/opentelemetry-cpp/pull/4029)
* [ADMIN] remove .vscode from the repo
[#4030](https://github.com/open-telemetry/opentelemetry-cpp/pull/4030)
* [SDK] env var durations non conforming to spec
[#4020](https://github.com/open-telemetry/opentelemetry-cpp/pull/4020)
* Bump curl from 8.12.0 to 8.12.0.bcr.1
[#4036](https://github.com/open-telemetry/opentelemetry-cpp/pull/4036)
* fix examples/configuration
[#4041](https://github.com/open-telemetry/opentelemetry-cpp/pull/4041)
* fix: noexcept for Observer
[#4039](https://github.com/open-telemetry/opentelemetry-cpp/pull/4039)
* Bump platforms from 1.0.0 to 1.1.0
[#4050](https://github.com/open-telemetry/opentelemetry-cpp/pull/4050)
* Bump github/codeql-action from 4.35.2 to 4.35.3
[#4048](https://github.com/open-telemetry/opentelemetry-cpp/pull/4048)
* Bump step-security/harden-runner from 2.19.0 to 2.19.1
[#4049](https://github.com/open-telemetry/opentelemetry-cpp/pull/4049)
* [DOC] Document adding attributes on span creation
[#4053](https://github.com/open-telemetry/opentelemetry-cpp/pull/4053)
* [SDK] Enable W3C Trace Context v2
[#4012](https://github.com/open-telemetry/opentelemetry-cpp/pull/4012)
* Bump step-security/harden-runner from 2.18.0 to 2.19.1
[#4056](https://github.com/open-telemetry/opentelemetry-cpp/pull/4056)
* [CODE HEALTH] fix nondeterministic pointer iteration order warnings
[#4035](https://github.com/open-telemetry/opentelemetry-cpp/pull/4035)
* Bump benchmark-action/github-action-benchmark from 1.22.0 to 1.22.1
[#4059](https://github.com/open-telemetry/opentelemetry-cpp/pull/4059)
* [EXPORTER] Fix PrometheusExporter to propagate new options to collector
[#4055](https://github.com/open-telemetry/opentelemetry-cpp/pull/4055)
* [SDK] Fix overflow attribute name to match the spec (otel.metric.overflow)
[#4060](https://github.com/open-telemetry/opentelemetry-cpp/pull/4060)
* [EXPORTER] Implement non-utf8 string to bytes in OTLP
[#3991](https://github.com/open-telemetry/opentelemetry-cpp/pull/3991)
* [Docs] Fix Read the Docs configuration
[#4058](https://github.com/open-telemetry/opentelemetry-cpp/pull/4058)
* [API] Fix `Logger.Enabled()`
[#4011](https://github.com/open-telemetry/opentelemetry-cpp/pull/4011)
* [CI] Use fixed versions in iwyu CI & dev container
[#4051](https://github.com/open-telemetry/opentelemetry-cpp/pull/4051)
* docs: Expand SIG meeting welcoming language
[#4064)](https://github.com/open-telemetry/opentelemetry-cpp/pull/4064)
* [CI] update clang-tidy config
[#4066](https://github.com/open-telemetry/opentelemetry-cpp/pull/4066)
* [TEST] Assert overflow attribute value is boolean true
[#4063](https://github.com/open-telemetry/opentelemetry-cpp/pull/4063)
* Bump github/codeql-action from 4.35.3 to 4.35.4
[#4067](https://github.com/open-telemetry/opentelemetry-cpp/pull/4067)
* chore: Move inactive members to emeritus
[#4040](https://github.com/open-telemetry/opentelemetry-cpp/pull/4040)
* [EXAMPLE] Add manual asynchronous context propagation example
[#3935](https://github.com/open-telemetry/opentelemetry-cpp/pull/3935)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.41.1
[#4075](https://github.com/open-telemetry/opentelemetry-cpp/pull/4075)
* [BUILD] Upgrade to rapidyaml 0.12.1
[#4076](https://github.com/open-telemetry/opentelemetry-cpp/pull/4076)
* [EXPORTER] OTLP HTTP exporters read unbounded HTTP response
[#4078](https://github.com/open-telemetry/opentelemetry-cpp/pull/4078)
* [SDK] Fix Base2ExponentialHistogramAggregation count dropped
[#4072](https://github.com/open-telemetry/opentelemetry-cpp/pull/4072)
* [RELEASE] Release opentelemetry-cpp 1.27.0
[#4080](https://github.com/open-telemetry/opentelemetry-cpp/pull/4080)
Security fix:
* [EXPORTER] OTLP HTTP exporters read unbounded HTTP response
[#4078](https://github.com/open-telemetry/opentelemetry-cpp/pull/4078)
* When exporting OTLP HTTP data to a misconfigured or malicious endpoint,
the exporter could allocate an arbitrary amount of memory when getting
the endpoint HTTP response back.
* The size of HTTP responses is now limited to 4MiB by default,
following the opentelemetry-proto recommendations.
* See CVE-2026-44967
Important changes:
* [SDK] Move inline implementation from SDK headers to .cc files.
[#3887](https://github.com/open-telemetry/opentelemetry-cpp/pull/3887)
* Note: `GetEmptyAttributes()` now requires linking `opentelemetry_common`.
* Enable WITH_OTLP_RETRY_PREVIEW by default
[#3953](https://github.com/open-telemetry/opentelemetry-cpp/pull/3953)
* CMake flag WITH_OTLP_RETRY_PREVIEW is now enabled by default.
* This flag is deprecated, planned for removal.
* Enable WITH_OTLP_GRPC_SSL_MTLS_PREVIEW by default
[#3970](https://github.com/open-telemetry/opentelemetry-cpp/pull/3970)
* CMake flag WITH_OTLP_GRPC_SSL_MTLS_PREVIEW is now enabled by default.
* This flag is deprecated, planned for removal.
* Bazel now always builds with ENABLE_OTLP_GRPC_SSL_MTLS_PREVIEW.
* grpc properties for ssl KEY and CERT are always available,
adjust the application code to initialize all members in grpc options.
* [EXPORTER] implement non-utf8 string to bytes in OTLP exporters
[#3991](https://github.com/open-telemetry/opentelemetry-cpp/pull/3991)
* Add WITH_OTLP_UTF8_VALIDITY for CMake
and enable ENABLE_OTLP_UTF8_VALIDITY for Bazel
to export non-UTF-8 strings as bytes in OTLP.
* Enable ENABLE_OTLP_RETRY_PREVIEW for bazel
[#4010](https://github.com/open-telemetry/opentelemetry-cpp/pull/4010)
* Bazel now always builds with ENABLE_OTLP_RETRY_PREVIEW.
* [API] Deprecate opentelemetry::plugin
[#4021](https://github.com/open-telemetry/opentelemetry-cpp/pull/4021)
* namespace opentelemetry::plugin is deprecated
* See file DEPRECATED.md for details.
* [SDK] Fix cardinality-limit overflow attribute name to match the
specification
[#4060](https://github.com/open-telemetry/opentelemetry-cpp/pull/4060)
* The synthetic overflow data point attribute is now exported as
`otel.metric.overflow` (singular) per the
[Metrics SDK specification](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/sdk.md#cardinality-limits).
* Previously the SDK exported `otel.metrics.overflow` (plural), which
diverged from the spec and from every other language SDK
(Go, Java, JS, .NET).
* Downstream consumers (dashboards, alerts, queries) that filtered on
the old name must be updated to the spec-correct name.
Breaking changes:
* [SDK] env var durations non conforming to spec
[#4020](https://github.com/open-telemetry/opentelemetry-cpp/pull/4020)
* Environment variables for durations can accept two formats, with units
(`15s`, `15000ms`) or without units (`15000`).
* When parsing environment variables that represent durations,
and only in the case no unit is provided,
for example `OTEL_METRIC_EXPORT_INTERVAL=15000`,
the code interpreted the value, `15000`,
in seconds instead of milliseconds per the specifications.
* Parsing duration without units has been fixed to use milliseconds.
* As a consequence, every duration environment variable set
without a unit is now interpreted differently, which is a breaking change.
* For example, `OTEL_EXPORTER_OTLP_TRACES_TIMEOUT=30` meant 30 seconds
before, and now means 30 milliseconds.
To preserve the same behavior, existing values must be adjusted,
to either `30000` or `30000ms` or `30s` in this case.
* The following variables are affected:
* OTEL_EXPORTER_OTLP_TRACES_TIMEOUT
* OTEL_EXPORTER_OTLP_METRICS_TIMEOUT
* OTEL_EXPORTER_OTLP_LOGS_TIMEOUT
* OTEL_EXPORTER_OTLP_TIMEOUT
* OTEL_BLRP_SCHEDULE_DELAY
* OTEL_BLRP_EXPORT_TIMEOUT
* OTEL_METRIC_EXPORT_INTERVAL
* OTEL_METRIC_EXPORT_TIMEOUT
* OTEL_BSP_SCHEDULE_DELAY
* OTEL_BSP_EXPORT_TIMEOUT
## [1.26.0] 2026-03-19
* [RELEASE] Bump main branch to 1.26.0-dev
[#3853](https://github.com/open-telemetry/opentelemetry-cpp/pull/3853)
* [BUILD] Configure ryml to use exceptions
[#3852](https://github.com/open-telemetry/opentelemetry-cpp/pull/3852)
* Bump step-security/harden-runner from 2.14.1 to 2.14.2
[#3854](https://github.com/open-telemetry/opentelemetry-cpp/pull/3854)
* [CONFIGURATION] File configuration - handle invalid YAML
[#3858](https://github.com/open-telemetry/opentelemetry-cpp/pull/3858)
* Bump docker/build-push-action from 6.18.0 to 6.19.1
[#3860](https://github.com/open-telemetry/opentelemetry-cpp/pull/3860)
* [BUILD] Avoid break caused by max() macro on windows
[#3863](https://github.com/open-telemetry/opentelemetry-cpp/pull/3863)
* Bump docker/build-push-action from 6.19.1 to 6.19.2
[#3864](https://github.com/open-telemetry/opentelemetry-cpp/pull/3864)
* Bump github/codeql-action from 4.32.2 to 4.32.3
[#3868](https://github.com/open-telemetry/opentelemetry-cpp/pull/3868)
* Bump actions/stale from 10.1.1 to 10.2.0
[#3871](https://github.com/open-telemetry/opentelemetry-cpp/pull/3871)
* [CI] Fix publish-to-bcr workflow
[#3869](https://github.com/open-telemetry/opentelemetry-cpp/pull/3869)
* [CONFIGURATION] Provide bazel updates with dependabot
[#3870](https://github.com/open-telemetry/opentelemetry-cpp/pull/3870)
* Bump prometheus-cpp from 1.3.0 to 1.3.0.bcr.2
[#3873](https://github.com/open-telemetry/opentelemetry-cpp/pull/3873)
* Bump bazel_skylib from 1.7.1 to 1.9.0
[#3874](https://github.com/open-telemetry/opentelemetry-cpp/pull/3874)
* Bump rules_cc from 0.2.9 to 0.2.17
[#3875](https://github.com/open-telemetry/opentelemetry-cpp/pull/3875)
* Bump zlib from 1.3.1.bcr.5 to 1.3.2
[#3880](https://github.com/open-telemetry/opentelemetry-cpp/pull/3880)
* Bump curl from 8.8.0 to 8.11.0.bcr.4
[#3879](https://github.com/open-telemetry/opentelemetry-cpp/pull/3879)
* [CI] Add Doxygen validation workflow
[#3882](https://github.com/open-telemetry/opentelemetry-cpp/pull/3882)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.40.0
[#3881](https://github.com/open-telemetry/opentelemetry-cpp/pull/3881)
* Bump github/codeql-action from 4.32.3 to 4.32.4
[#3884](https://github.com/open-telemetry/opentelemetry-cpp/pull/3884)
* [API] Environment Variables as Context Propagation Carriers
[#3834](https://github.com/open-telemetry/opentelemetry-cpp/pull/3834)
* [SDK] Trace StartSpan - do not call GetCurrentSpan() unless needed
[#3888](https://github.com/open-telemetry/opentelemetry-cpp/pull/3888)
* Bump step-security/harden-runner from 2.14.2 to 2.15.0
[#3889](https://github.com/open-telemetry/opentelemetry-cpp/pull/3889)
* Bump google_benchmark from 1.8.4 to 1.9.5
[#3885](https://github.com/open-telemetry/opentelemetry-cpp/pull/3885)
* Bump actions/download-artifact from 7.0.0 to 8.0.0
[#3892](https://github.com/open-telemetry/opentelemetry-cpp/pull/3892)
* [BUILD] Revisit EventLogger deprecation
[#3855](https://github.com/open-telemetry/opentelemetry-cpp/pull/3855)
* Bump platforms from 0.0.11 to 1.0.0
[#3893](https://github.com/open-telemetry/opentelemetry-cpp/pull/3893)
* Bump benchmark-action/github-action-benchmark from 1.20.7 to 1.21.0
[#3896](https://github.com/open-telemetry/opentelemetry-cpp/pull/3896)
* Bump github/codeql-action from 4.32.4 to 4.32.5
[#3897](https://github.com/open-telemetry/opentelemetry-cpp/pull/3897)
* [TEST] Add multi-threaded metrics benchmarks: shared vs per-thread counter
[#3898](https://github.com/open-telemetry/opentelemetry-cpp/pull/3898)
* [BUILD] Upgrade bazel dependencies
[#3891](https://github.com/open-telemetry/opentelemetry-cpp/pull/3891)
* [CODE HEALTH] Fix clang-tidy warnings, part 2
[#3872](https://github.com/open-telemetry/opentelemetry-cpp/pull/3872)
* [CONFIGURATION] File configuration - spec stability
[#3862](https://github.com/open-telemetry/opentelemetry-cpp/pull/3862)
* [CI] replace cfssl with openssl for certificate generation
[#3902](https://github.com/open-telemetry/opentelemetry-cpp/pull/3902)
* Bump abseil-cpp from 20240116.1 to 20260107.1
[#3877](https://github.com/open-telemetry/opentelemetry-cpp/pull/3877)
* Bump googletest from 1.14.0.bcr.1 to 1.17.0.bcr.2
[#3876](https://github.com/open-telemetry/opentelemetry-cpp/pull/3876)
* Bump curl from 8.11.0.bcr.4 to 8.12.0
[#3904](https://github.com/open-telemetry/opentelemetry-cpp/pull/3904)
* [BUILD] Upgrade to rapidyaml 0.10.0
[#3906](https://github.com/open-telemetry/opentelemetry-cpp/pull/3906)
* Bump github/codeql-action from 4.32.5 to 4.32.6
[#3910](https://github.com/open-telemetry/opentelemetry-cpp/pull/3910)
* Bump nlohmann_json from 3.12.0 to 3.12.0.bcr.1
[#3912](https://github.com/open-telemetry/opentelemetry-cpp/pull/3912)
* Bump docker/setup-qemu-action from 3.7.0 to 4.0.0
[#3903](https://github.com/open-telemetry/opentelemetry-cpp/pull/3903)
* Bump docker/setup-buildx-action from 3.12.0 to 4.0.0
[#3907](https://github.com/open-telemetry/opentelemetry-cpp/pull/3907)
* [EXAMPLES] Deprecated semantic conventions used
[#3905](https://github.com/open-telemetry/opentelemetry-cpp/pull/3905)
* Bump docker/build-push-action from 6.19.2 to 7.0.0
[#3909](https://github.com/open-telemetry/opentelemetry-cpp/pull/3909)
* [CODE HEALTH] Fix clang-tidy warnings: cppcoreguidelines-init-variables
[#3919](https://github.com/open-telemetry/opentelemetry-cpp/pull/3919)
* Bump step-security/harden-runner from 2.15.0 to 2.15.1
[#3908](https://github.com/open-telemetry/opentelemetry-cpp/pull/3908)
* [CODE HEALTH] Fix clang-tidy misc-use-internal-linkage warnings
[#3918](https://github.com/open-telemetry/opentelemetry-cpp/pull/3918)
* [CODE HEALTH] Fix clang-tidy macro to enum warnings
[#3922](https://github.com/open-telemetry/opentelemetry-cpp/pull/3922)
* [BUILD] Fix benchmark genrule capturing stderr into JSON output
[#3925](https://github.com/open-telemetry/opentelemetry-cpp/pull/3925)
* [CODE HEALTH] Fix clang-tidy performance enum size warnings
[#3923](https://github.com/open-telemetry/opentelemetry-cpp/pull/3923)
* Bump actions/download-artifact from 8.0.0 to 8.0.1
[#3928](https://github.com/open-telemetry/opentelemetry-cpp/pull/3928)
* [CODE HEALTH] Fix clang-tidy warnings in nostd files
[#3924](https://github.com/open-telemetry/opentelemetry-cpp/pull/3924)
* [EXPORTER] Allow custom HttpClient in OTLP HTTP
[#3930](https://github.com/open-telemetry/opentelemetry-cpp/pull/3930)
* [CODE HEALTH] Fix clang-tidy performance-for-range-copy warnings
[#3932](https://github.com/open-telemetry/opentelemetry-cpp/pull/3932)
* [CODE HEALTH] Fix clang-tidy performance-unnecessary-value-param warnings
[#3931](https://github.com/open-telemetry/opentelemetry-cpp/pull/3931)
* [CODE HEALTH] Fix clang-tidy bugprone warnings
[#3933](https://github.com/open-telemetry/opentelemetry-cpp/pull/3933)
* [CODE HEALTH] Fix clang-tidy special-member-functions warnings in trace API
[#3934](https://github.com/open-telemetry/opentelemetry-cpp/pull/3934)
* Bump github/codeql-action from 4.32.6 to 4.33.0
[#3936](https://github.com/open-telemetry/opentelemetry-cpp/pull/3936)
* Bump step-security/harden-runner from 2.15.1 to 2.16.0
[#3937](https://github.com/open-telemetry/opentelemetry-cpp/pull/3937)
* [TEST] CMake component install test for `resource_detectors`
[#3940](https://github.com/open-telemetry/opentelemetry-cpp/pull/3940)
* [CODE HEALTH] Fix clang-tidy performance warnings
[#3941](https://github.com/open-telemetry/opentelemetry-cpp/pull/3941)
* [EXPORTERS] Remove prometheus timestamps
[#3895](https://github.com/open-telemetry/opentelemetry-cpp/pull/3895)
* [SDK] Swap Tracer/Meter/LoggerConfig disabled for enabled
[#3942](https://github.com/open-telemetry/opentelemetry-cpp/pull/3942)
* [CMAKE] Update third party dependencies for cmake builds
[#3943](https://github.com/open-telemetry/opentelemetry-cpp/pull/3943)
* Bump codecov/codecov-action from 5.5.2 to 5.5.3
[#3945](https://github.com/open-telemetry/opentelemetry-cpp/pull/3945)
* Bump actions/cache from 5.0.3 to 5.0.4
[#3946](https://github.com/open-telemetry/opentelemetry-cpp/pull/3946)
* [CONFIGURATION] File configuration - Tracer/Meter/Logger config
[#3920](https://github.com/open-telemetry/opentelemetry-cpp/pull/3920)
Important changes:
* [SDK] Swap Tracer/Meter/LoggerConfig disabled for enabled
[#3942](https://github.com/open-telemetry/opentelemetry-cpp/pull/3942)
* In TracerConfig(bool), MeterConfig(bool), and LoggerConfig(bool),
the boolean parameter now represents `enabled` instead of `disabled`.
* User code calling these constructors explicitly must be adjusted
to pass `false` to disable.
* [BUILD] Revisit EventLogger deprecation
[#3855](https://github.com/open-telemetry/opentelemetry-cpp/pull/3855)
* File `DEPRECATED.md` contains information about current deprecation
plans.
* Please adjust your application accordingly, to avoid disruption.
* [CONFIGURATION] File configuration - spec stability
[#3862](https://github.com/open-telemetry/opentelemetry-cpp/pull/3862)
* The specification for declarative configuration is now stable.
* As a result, environment variable `OTEL_EXPERIMENTAL_CONFIG_FILE`
is now renamed to `OTEL_CONFIG_FILE`.
## [1.25.0] 2026-02-07
* [RELEASE] Bump main branch to 1.25.0-dev (#3759)
[#3759](https://github.com/open-telemetry/opentelemetry-cpp/pull/3759)
* [API] fix sign-conversion warnings in span & trace id
[#3761](https://github.com/open-telemetry/opentelemetry-cpp/pull/3761)
* [TEST] Fix ZipkinExporterTestPeer.ExportJsonIntegrationTest stability
[#3760](https://github.com/open-telemetry/opentelemetry-cpp/pull/3760)
* Bump github/codeql-action from 4.31.4 to 4.31.5
[#3764](https://github.com/open-telemetry/opentelemetry-cpp/pull/3764)
* [CI] Update markdownlint-cli version to 0.46.0
[#3769](https://github.com/open-telemetry/opentelemetry-cpp/pull/3769)
* [chore] Add clo monitor exemption for artifact hub
[#3772](https://github.com/open-telemetry/opentelemetry-cpp/pull/3772)
* [API] fix shared_ptr self assignments
[#3768](https://github.com/open-telemetry/opentelemetry-cpp/pull/3768)
* chore: Add badges to readme
[#3773](https://github.com/open-telemetry/opentelemetry-cpp/pull/3773)
* Bump github/codeql-action from 4.31.5 to 4.31.6
[#3774](https://github.com/open-telemetry/opentelemetry-cpp/pull/3774)
* Bump step-security/harden-runner from 2.13.2 to 2.13.3
[#3776](https://github.com/open-telemetry/opentelemetry-cpp/pull/3776)
* Bump actions/checkout from 6.0.0 to 6.0.1
[#3775](https://github.com/open-telemetry/opentelemetry-cpp/pull/3775)
* [TEST] Multiple exports in OTLP HTTP exporters tests
[#3771](https://github.com/open-telemetry/opentelemetry-cpp/pull/3771)
* Bump actions/stale from 10.1.0 to 10.1.1
[#3777](https://github.com/open-telemetry/opentelemetry-cpp/pull/3777)
* Bump github/codeql-action from 4.31.6 to 4.31.7
[#3783](https://github.com/open-telemetry/opentelemetry-cpp/pull/3783)
* [SDK] Fix BatchSpanProcessorOptions and BatchLogRecordProcessorOptions
to restore C++20 aggregate initialization support
[#3780](https://github.com/open-telemetry/opentelemetry-cpp/pull/3780)
* [CI] Add BCR GitHub workflow and configuration
[#3782](https://github.com/open-telemetry/opentelemetry-cpp/pull/3782)
* Bump codecov/codecov-action from 5.5.1 to 5.5.2
[#3785](https://github.com/open-telemetry/opentelemetry-cpp/pull/3785)
* Bump step-security/harden-runner from 2.13.3 to 2.14.0
[#3784](https://github.com/open-telemetry/opentelemetry-cpp/pull/3784)
* Bump actions/cache from 4.3.0 to 5.0.0
[#3786](https://github.com/open-telemetry/opentelemetry-cpp/pull/3786)
* Bump actions/download-artifact from 6.0.0 to 7.0.0
[#3791](https://github.com/open-telemetry/opentelemetry-cpp/pull/3791)
* Bump github/codeql-action from 4.31.7 to 4.31.8
[#3790](https://github.com/open-telemetry/opentelemetry-cpp/pull/3790)
* Bump actions/cache from 5.0.0 to 5.0.1
[#3789](https://github.com/open-telemetry/opentelemetry-cpp/pull/3789)
* Bump bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml
from 1.0.0 to 1.1.0
[#3788](https://github.com/open-telemetry/opentelemetry-cpp/pull/3788)
* [CI] upgrade to clang-tidy 20
[#3762](https://github.com/open-telemetry/opentelemetry-cpp/pull/3762)
* [SDK] Fix off-by-one error in
Base2ExponentialHistogramAggregation::Merge() downscaling
[#3793](https://github.com/open-telemetry/opentelemetry-cpp/pull/3793)
* Bump github/codeql-action from 4.31.8 to 4.31.9
[#3792](https://github.com/open-telemetry/opentelemetry-cpp/pull/3792)
* Bump docker/setup-buildx-action from 3.11.1 to 3.12.0
[#3797](https://github.com/open-telemetry/opentelemetry-cpp/pull/3797)
* [SDK] Implement EnvEntityDetector for OTEL_ENTITIES parsing (#3652)
[#3795](https://github.com/open-telemetry/opentelemetry-cpp/pull/3795)
* [ADMIN] Update link to SIG meeting notes
[#3803](https://github.com/open-telemetry/opentelemetry-cpp/pull/3803)
* [CONFIGURATION] File configuration - remove zipkin
[#3804](https://github.com/open-telemetry/opentelemetry-cpp/pull/3804)
* [CONFIGURATION] File configuration - rename tls properties
[#3805](https://github.com/open-telemetry/opentelemetry-cpp/pull/3805)
* [EXPORTER] add OTLP HTTP metric exporter benchmark
[#3801](https://github.com/open-telemetry/opentelemetry-cpp/pull/3801)
* [API] Parse baggage value as spec compliant
[#3758](https://github.com/open-telemetry/opentelemetry-cpp/pull/3758)
* Bump github/codeql-action from 4.31.9 to 4.31.10
[#3807](https://github.com/open-telemetry/opentelemetry-cpp/pull/3807)
* [TEST] add test for invalid OTEL_BLRP_SCHEDULE_DELAY env value
[#3811](https://github.com/open-telemetry/opentelemetry-cpp/pull/3811)
* [CONFIGURATION] File configuration - implement log_level
[#3810](https://github.com/open-telemetry/opentelemetry-cpp/pull/3810)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.39.0
[#3813](https://github.com/open-telemetry/opentelemetry-cpp/pull/3813)
* Bump actions/cache from 5.0.1 to 5.0.2
[#3814](https://github.com/open-telemetry/opentelemetry-cpp/pull/3814)
* [CONFIGURATION] File configuration - prometheus without_target_info
[#3818](https://github.com/open-telemetry/opentelemetry-cpp/pull/3818)
* [BAZEL] Fix CI after bazel 9.0.0 release
[#3823](https://github.com/open-telemetry/opentelemetry-cpp/pull/3823)
* [TEST] Extend logs invalid schedule delay tests
[#3812](https://github.com/open-telemetry/opentelemetry-cpp/pull/3812)
* [BUILD] Update vendored TraceLoggingDynamic.h to compile
with msvc's conformant preprocessor
[#3822](https://github.com/open-telemetry/opentelemetry-cpp/pull/3822)
* [CONFIGURATION] File configuration - implement cardinality_limits
[#3820](https://github.com/open-telemetry/opentelemetry-cpp/pull/3820)
* Bump actions/checkout from 6.0.1 to 6.0.2
[#3826](https://github.com/open-telemetry/opentelemetry-cpp/pull/3826)
* [ETW] Fix infinite loop in ETWProvider::close
[#3827](https://github.com/open-telemetry/opentelemetry-cpp/pull/3827)
* [ETW] Fix tracer initialization order
[#3824](https://github.com/open-telemetry/opentelemetry-cpp/pull/3824)
* Bump github/codeql-action from 4.31.10 to 4.31.11
[#3828](https://github.com/open-telemetry/opentelemetry-cpp/pull/3828)
* Bump step-security/harden-runner from 2.14.0 to 2.14.1
[#3832](https://github.com/open-telemetry/opentelemetry-cpp/pull/3832)
* Bump github/codeql-action from 4.31.11 to 4.32.0
[#3831](https://github.com/open-telemetry/opentelemetry-cpp/pull/3831)
* [ETW] Fix ETW Log Exporter: incorrect timestamp, traceId, and spanId
[#3836](https://github.com/open-telemetry/opentelemetry-cpp/pull/3836)
* [CONFIGURATION] File configuration - implement distribution
[#3833](https://github.com/open-telemetry/opentelemetry-cpp/pull/3833)
* Bump actions/cache from 5.0.2 to 5.0.3
[#3838](https://github.com/open-telemetry/opentelemetry-cpp/pull/3838)
* [CONFIGURATION] File configuration - exemplar filter
[#3837](https://github.com/open-telemetry/opentelemetry-cpp/pull/3837)
* [EXPORTER] Add support for otlp exporter collection limits
[#3816](https://github.com/open-telemetry/opentelemetry-cpp/pull/3816)
* [BAZEL] Add linkstatic = True to http_client_curl
[#3825](https://github.com/open-telemetry/opentelemetry-cpp/pull/3825)
* Bump github/codeql-action from 4.32.0 to 4.32.1
[#3839](https://github.com/open-telemetry/opentelemetry-cpp/pull/3839)
* [CODE HEALTH] Fix clang-tidy warnings, part 1
[#3841](https://github.com/open-telemetry/opentelemetry-cpp/pull/3841)
* [SDK] Invalid thread instrumentation in PeriodicExportingMetricReader
[#3842](https://github.com/open-telemetry/opentelemetry-cpp/pull/3842)
* [BUILD] Support build proto as shared lib on Windows
[#3714](https://github.com/open-telemetry/opentelemetry-cpp/pull/3714)
* [INSTALL] Add pkg-config support for exporters
[#3829](https://github.com/open-telemetry/opentelemetry-cpp/pull/3829)
* Bump github/codeql-action from 4.32.1 to 4.32.2
[#3847](https://github.com/open-telemetry/opentelemetry-cpp/pull/3847)
* Bump fossas/fossa-action from 1.7.0 to 1.8.0
[#3848](https://github.com/open-telemetry/opentelemetry-cpp/pull/3848)
* [RELEASE] Release opentelemetry-cpp 1.25.0
[#3850](https://github.com/open-telemetry/opentelemetry-cpp/pull/3850)
* [BUILD] Ignore deprecated warning
[#3845](https://github.com/open-telemetry/opentelemetry-cpp/pull/3845)
Breaking changes:
* [CONFIGURATION] File configuration - remove zipkin
[#3804](https://github.com/open-telemetry/opentelemetry-cpp/pull/3804)
* The zipkin trace exporter is no longer supported
by declarative configuration, due to an upstream schema change.
* [CONFIGURATION] File configuration - rename tls properties
[#3805](https://github.com/open-telemetry/opentelemetry-cpp/pull/3805)
* The Tls properties for Grpc and Http are renamed,
due to an upstream schema change.
* [SDK] Invalid thread instrumentation in PeriodicExportingMetricReader
[#3842](https://github.com/open-telemetry/opentelemetry-cpp/pull/3842)
* The collect thread in the periodic exporting metric reader no longer
exists.
* As a result, member `collect_thread_instrumentation` in class
`PeriodicExportingMetricReaderRuntimeOptions` is removed.
## [1.24.0] 2025-11-20
* [RELEASE] Bump main branch to 1.24-dev
[#3662](https://github.com/open-telemetry/opentelemetry-cpp/pull/3662)
* [TEST] Remove workaround for metrics cardinality limit test
[#3663](https://github.com/open-telemetry/opentelemetry-cpp/pull/3663)
* Bump github/codeql-action from 3.30.3 to 3.30.4
[#3664](https://github.com/open-telemetry/opentelemetry-cpp/pull/3664)
* [CONFIGURATION] File configuration - semantic version
[#3629](https://github.com/open-telemetry/opentelemetry-cpp/pull/3629)
* [BUILD] Fix MinGW GCC cross compilation build on Linux for Windows
[#3666](https://github.com/open-telemetry/opentelemetry-cpp/pull/3666)
* [CONFIGURATION] File configuration - cmake build
[#3655](https://github.com/open-telemetry/opentelemetry-cpp/pull/3655)
* [CONFIGURATION] File configuration - bazel build
[#3654](https://github.com/open-telemetry/opentelemetry-cpp/pull/3654)
* Bump step-security/harden-runner from 2.12.2 to 2.13.1
[#3671](https://github.com/open-telemetry/opentelemetry-cpp/pull/3671)
* Bump github/codeql-action from 3.30.4 to 3.30.5
[#3670](https://github.com/open-telemetry/opentelemetry-cpp/pull/3670)
* Bump actions/checkout from 4.2.2 to 5.0.0
[#3669](https://github.com/open-telemetry/opentelemetry-cpp/pull/3669)
* [CMAKE] Only build and run the exemplar tests if the preview flag is set
[#3675](https://github.com/open-telemetry/opentelemetry-cpp/pull/3675)
* [TEST] Update latest versions of protobuf, grpc, and curl for testing
[#3678](https://github.com/open-telemetry/opentelemetry-cpp/pull/3678)
* [SDK] Fix typo in hashmap method GetEnteries
[#3680](https://github.com/open-telemetry/opentelemetry-cpp/pull/3680)
* [TEST] add ryml to the conan files for install tests
[#3679](https://github.com/open-telemetry/opentelemetry-cpp/pull/3679)
* [TRACE SDK] Batch span processor options now using env variables
[#3661](https://github.com/open-telemetry/opentelemetry-cpp/pull/3661)
* Bump ossf/scorecard-action from 2.4.2 to 2.4.3
[#3677](https://github.com/open-telemetry/opentelemetry-cpp/pull/3677)
* [CONFIGURATION] File configuration - cmake install
[#3668](https://github.com/open-telemetry/opentelemetry-cpp/pull/3668)
* Bump github/codeql-action from 3.30.5 to 3.30.6
[#3683](https://github.com/open-telemetry/opentelemetry-cpp/pull/3683)
* Bump peter-evans/create-or-update-comment from 4.0.0 to 5.0.0
[#3682](https://github.com/open-telemetry/opentelemetry-cpp/pull/3682)
* Bump actions/stale from 10.0.0 to 10.1.0
[#3686](https://github.com/open-telemetry/opentelemetry-cpp/pull/3686)
* [SDK] BatchLogRecordProcessorOptions from env variables
[#3687](https://github.com/open-telemetry/opentelemetry-cpp/pull/3687)
* [BUILD] Upgrade third party versions to the latest
[#3685](https://github.com/open-telemetry/opentelemetry-cpp/pull/3685)
* Bump github/codeql-action from 3.30.6 to 4.30.7
[#3689](https://github.com/open-telemetry/opentelemetry-cpp/pull/3689)
* Bump github/codeql-action from 4.30.7 to 4.30.8
[#3692](https://github.com/open-telemetry/opentelemetry-cpp/pull/3692)
* [Metrics] Allow registering one callback for multiple instruments
[#3667](https://github.com/open-telemetry/opentelemetry-cpp/pull/3667)
* [CI] Upgrade tools/vcpkg to 2025.09.17
[#3701](https://github.com/open-telemetry/opentelemetry-cpp/pull/3701)
* [CI] Upgrade to conan 2.21.0 for conanfile_latest
[#3703](https://github.com/open-telemetry/opentelemetry-cpp/pull/3703)
* [bazel] Drop WORKSPACE support
[#3699](https://github.com/open-telemetry/opentelemetry-cpp/pull/3699)
* Bump github/codeql-action from 4.30.8 to 4.30.9
[#3707](https://github.com/open-telemetry/opentelemetry-cpp/pull/3707)
* [BUILD] Add rules_cc load statements
[#3697](https://github.com/open-telemetry/opentelemetry-cpp/pull/3697)
* [CONFIGURATION] File configuration - parser location
[#3705](https://github.com/open-telemetry/opentelemetry-cpp/pull/3705)
* [API] Fix -Werror=alloc-size-larger-than= warning in runtime_context.h
[#3709](https://github.com/open-telemetry/opentelemetry-cpp/pull/3709)
* Bump github/codeql-action from 4.30.9 to 4.31.0
[#3720](https://github.com/open-telemetry/opentelemetry-cpp/pull/3720)
* Bump actions/download-artifact from 5.0.0 to 6.0.0
[#3719](https://github.com/open-telemetry/opentelemetry-cpp/pull/3719)
* [CONFIGURATION] File configuration - prometheus translation
[#3715](https://github.com/open-telemetry/opentelemetry-cpp/pull/3715)
* [SDK] Misc cleanup in attribute_utils.h
[#3716](https://github.com/open-telemetry/opentelemetry-cpp/pull/3716)
* [TEST] Disable test BasicCurlHttpTests.SendGetRequestAsync
[#3722](https://github.com/open-telemetry/opentelemetry-cpp/pull/3722)
* [SDK] Add cardinality_limit to all derived classes of AggregationConfig
[#3728](https://github.com/open-telemetry/opentelemetry-cpp/pull/3728)
* Bump github/codeql-action from 4.31.0 to 4.31.2
[#3733](https://github.com/open-telemetry/opentelemetry-cpp/pull/3733)
* [BUILD] Upgrade to opentelemetry-proto 1.8.0
[#3730](https://github.com/open-telemetry/opentelemetry-cpp/pull/3730)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.38.0
[#3729](https://github.com/open-telemetry/opentelemetry-cpp/pull/3729)
* [CONFIGURATION] Implement declarative configuration (config.yaml)
[#2518](https://github.com/open-telemetry/opentelemetry-cpp/pull/2518)
* [CONFIGURATION] File configuration - tls
[#3726](https://github.com/open-telemetry/opentelemetry-cpp/pull/3726)
* [CONFIGURATION] File configuration - console metric exporter
[#3734](https://github.com/open-telemetry/opentelemetry-cpp/pull/3734)
* [DOCS] Remove out-of-date vcpkg docs
[#3735](https://github.com/open-telemetry/opentelemetry-cpp/pull/3735)
* [DOCKER] Update docker files to build all third party dependencies
from the tags file
[#3718](https://github.com/open-telemetry/opentelemetry-cpp/pull/3718)
* Bump docker/setup-qemu-action from 3.6.0 to 3.7.0
[#3739](https://github.com/open-telemetry/opentelemetry-cpp/pull/3739)
* Bump step-security/harden-runner from 2.13.1 to 2.13.2
[#3738](https://github.com/open-telemetry/opentelemetry-cpp/pull/3738)
* [API] Make Request Context Token constructor public
[#3708](https://github.com/open-telemetry/opentelemetry-cpp/pull/3708)
* [BUILD] Remove CMAKE POLICY CMP0092
[#3741](https://github.com/open-telemetry/opentelemetry-cpp/pull/3741)
* [DOCS] Fix code sample for setting CustomLogHandler
[#3736](https://github.com/open-telemetry/opentelemetry-cpp/pull/3736)
* Bump github/codeql-action from 4.31.2 to 4.31.3
[#3744](https://github.com/open-telemetry/opentelemetry-cpp/pull/3744)
* [METRICS] Add tag to AggregationConfig for aggregation type validation
[#3732](https://github.com/open-telemetry/opentelemetry-cpp/pull/3732)
* [BUILD] CMake install path with double slash
[#3747](https://github.com/open-telemetry/opentelemetry-cpp/pull/3747)
* [CI] Free disk space
[#3749](https://github.com/open-telemetry/opentelemetry-cpp/pull/3749)
* [SDK] Reset TraceFlags::IsSampled bit on sampler Decision::DROP
[#3745](https://github.com/open-telemetry/opentelemetry-cpp/pull/3745)
* [CODE HEALTH] turn on the cppcoreguidelines-init-variables check and fix warnings
[#3751](https://github.com/open-telemetry/opentelemetry-cpp/pull/3751)
* Bump actions/checkout from 5.0.0 to 5.0.1
[#3753](https://github.com/open-telemetry/opentelemetry-cpp/pull/3753)
* Bump github/codeql-action from 4.31.3 to 4.31.4
[#3755](https://github.com/open-telemetry/opentelemetry-cpp/pull/3755)
* Bump actions/checkout from 5.0.1 to 6.0.0
[#3757](https://github.com/open-telemetry/opentelemetry-cpp/pull/3757)
New Features:
* [CONFIGURATION] Implement declarative configuration (config.yaml)
[#2518](https://github.com/open-telemetry/opentelemetry-cpp/pull/2518)
* Configuration for opentelemetry-cpp can now be done using a config.yaml
file, instead of using environment variables.
* See [opentelemetry-configuration](https://github.com/open-telemetry/opentelemetry-configuration)
## [1.23.0] 2025-09-25
* [CodeHealth] Fix clang-tidy warnings part 6
[#3507](https://github.com/open-telemetry/opentelemetry-cpp/pull/3507)
* [CMAKE] Add CMake scripts to find or fetch curl and find zlib
[#3526](https://github.com/open-telemetry/opentelemetry-cpp/pull/3526)
* [REMOVAL] remove unused ci bash scripts
[#3541](https://github.com/open-telemetry/opentelemetry-cpp/pull/3541)
* Bump step-security/harden-runner from 2.12.2 to 2.13.0
[#3542](https://github.com/open-telemetry/opentelemetry-cpp/pull/3542)
* [SDK] Ensure TraceId is portable on big-endian architectures
[#3543](https://github.com/open-telemetry/opentelemetry-cpp/pull/3543)
* [TEST] Shared otel-cpp libs linked to latest static protobuf and grpc
[#3544](https://github.com/open-telemetry/opentelemetry-cpp/pull/3544)
* [CONFIGURATION] File configuration - component registry
[#3537](https://github.com/open-telemetry/opentelemetry-cpp/pull/3537)
* [SDK] Implement env var configuration for PeriodicExportingMetricReader
[#3549](https://github.com/open-telemetry/opentelemetry-cpp/pull/3549)
* [SDK] Update default exemplar reservoir size for exponential histograms
[#3551](https://github.com/open-telemetry/opentelemetry-cpp/pull/3551)
* [SDK] Implements options for the ParentBasedSampler with default values
[#3553](https://github.com/open-telemetry/opentelemetry-cpp/pull/3553)
* Bump github/codeql-action from 3.29.2 to 3.29.3
[#3556](https://github.com/open-telemetry/opentelemetry-cpp/pull/3556)
* [CMAKE] Add CMake scripts to find or fetch protobuf and grpc
[#3533](https://github.com/open-telemetry/opentelemetry-cpp/pull/3533)
* [CONFIGURATION] File configuration - sdk builder
[#3550](https://github.com/open-telemetry/opentelemetry-cpp/pull/3550)
* Bump github/codeql-action from 3.29.3 to 3.29.4
[#3558](https://github.com/open-telemetry/opentelemetry-cpp/pull/3558)
* [CONFIGURATION] File configuration - spec version 1.0.0-rc1
[#3557](https://github.com/open-telemetry/opentelemetry-cpp/pull/3557)
* [CONFIGURATION] File configuration - sdk resource
[#3567](https://github.com/open-telemetry/opentelemetry-cpp/pull/3567)
* [CONFIGURATION] File configuration - ostream exporter builders
[#3563](https://github.com/open-telemetry/opentelemetry-cpp/pull/3563)
* [CONFIGURATION] File configuration - prometheus exporter builder
[#3564](https://github.com/open-telemetry/opentelemetry-cpp/pull/3564)
* [CONFIGURATION] File configuration - zipkin exporter builder
[#3565](https://github.com/open-telemetry/opentelemetry-cpp/pull/3565)
* [CONFIGURATION] File configuration - otlp exporter builders
[#3566](https://github.com/open-telemetry/opentelemetry-cpp/pull/3566)
* [CMAKE] Don't set iwyu and clang-tidy properties on nlohmann_json with cmake <3.19
[#3568](https://github.com/open-telemetry/opentelemetry-cpp/pull/3568)
* [SDK] View should not have a unit
[#3552](https://github.com/open-telemetry/opentelemetry-cpp/pull/3552)
* [EXPORTER] Fixes tsan warnings
[#3531](https://github.com/open-telemetry/opentelemetry-cpp/pull/3531)
* [DOC] Document minimum required versions
[#3562](https://github.com/open-telemetry/opentelemetry-cpp/pull/3562)
* Bump github/codeql-action from 3.29.4 to 3.29.5
[#3574](https://github.com/open-telemetry/opentelemetry-cpp/pull/3574)
* Add subscript to issue templates
[#3576](https://github.com/open-telemetry/opentelemetry-cpp/pull/3576)
* [CONFIGURATION] File configuration - configuration example
[#3573](https://github.com/open-telemetry/opentelemetry-cpp/pull/3573)
* Bump actions/download-artifact from 4.3.0 to 5.0.0
[#3578](https://github.com/open-telemetry/opentelemetry-cpp/pull/3578)
* Bump actions/cache from 4.2.3 to 4.2.4
[#3580](https://github.com/open-telemetry/opentelemetry-cpp/pull/3580)
* [SDK] Implementation of container resource as per semconv
[#3572](https://github.com/open-telemetry/opentelemetry-cpp/pull/3572)
* Bump github/codeql-action from 3.29.7 to 3.29.8
[#3584](https://github.com/open-telemetry/opentelemetry-cpp/pull/3584)
* [CI] update do_ci scripts to use common cmake cache scripts
[#3582](https://github.com/open-telemetry/opentelemetry-cpp/pull/3582)
* Bump actions/checkout from 4.2.2 to 5.0.0
[#3587](https://github.com/open-telemetry/opentelemetry-cpp/pull/3587)
* Bump github/codeql-action from 3.29.8 to 3.29.9
[#3589](https://github.com/open-telemetry/opentelemetry-cpp/pull/3589)
* [BUILD] Remove duplicated deprecated warnings in logs headers
[#3592](https://github.com/open-telemetry/opentelemetry-cpp/pull/3592)
* Bump github/codeql-action from 3.29.9 to 3.29.10
[#3595](https://github.com/open-telemetry/opentelemetry-cpp/pull/3595)
* [resource_detectors] implementation of process resource detector as per semconv
[#3591](https://github.com/open-telemetry/opentelemetry-cpp/pull/3591)
* Bump codecov/codecov-action from 5.4.3 to 5.5.0
[#3597](https://github.com/open-telemetry/opentelemetry-cpp/pull/3597)
* Bump github/codeql-action from 3.29.10 to 3.29.11
[#3602](https://github.com/open-telemetry/opentelemetry-cpp/pull/3602)
* [BAZEL] Drop rules_foreign_cc as a dependency
[#3601](https://github.com/open-telemetry/opentelemetry-cpp/pull/3601)
* [BUILD] Remove cmake support for thrift as Jaeger was removed
[#3604](https://github.com/open-telemetry/opentelemetry-cpp/pull/3604)
* [CMAKE] upgrade cmake minimum version to 3.16
[#3599](https://github.com/open-telemetry/opentelemetry-cpp/pull/3599)
* [CMAKE] Set the project version through the cmake project macro
[#3605](https://github.com/open-telemetry/opentelemetry-cpp/pull/3605)
* [CONFIGURATION] File configuration - functional tests
[#3606](https://github.com/open-telemetry/opentelemetry-cpp/pull/3606)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.37.0
[#3615](https://github.com/open-telemetry/opentelemetry-cpp/pull/3615)
* [BUILD] Use -dev versions in main branch
[#3609](https://github.com/open-telemetry/opentelemetry-cpp/pull/3609)
* [BAZEL] Fix version warnings in MODULE.bazel
[#3617](https://github.com/open-telemetry/opentelemetry-cpp/pull/3617)
* [Copilot] Add instructions for OpenTelemetry C++
[#3614](https://github.com/open-telemetry/opentelemetry-cpp/pull/3614)
* [MAINTAINER] Maintain version numbers with tbump
[#3616](https://github.com/open-telemetry/opentelemetry-cpp/pull/3616)
* Bump github/codeql-action from 3.29.11 to 3.30.0
[#3621](https://github.com/open-telemetry/opentelemetry-cpp/pull/3621)
* Bump benchmark-action/github-action-benchmark from 1.20.4 to 1.20.5
[#3623](https://github.com/open-telemetry/opentelemetry-cpp/pull/3623)
* [BUILD] Cleanup cppcheck warnings
[#3619](https://github.com/open-telemetry/opentelemetry-cpp/pull/3619)
* Bump actions/stale from 9.1.0 to 10.0.0
[#3626](https://github.com/open-telemetry/opentelemetry-cpp/pull/3626)
* Bump actions/github-script from 7.0.1 to 8.0.0
[#3627](https://github.com/open-telemetry/opentelemetry-cpp/pull/3627)
* Bump codecov/codecov-action from 5.5.0 to 5.5.1
[#3625](https://github.com/open-telemetry/opentelemetry-cpp/pull/3625)
* [resource_detectors] implementation of remaining process attributes
[#3603](https://github.com/open-telemetry/opentelemetry-cpp/pull/3603)
* Bump benchmark-action/github-action-benchmark from 1.20.5 to 1.20.7
[#3631](https://github.com/open-telemetry/opentelemetry-cpp/pull/3631)
* Bump github/codeql-action from 3.30.0 to 3.30.1
[#3630](https://github.com/open-telemetry/opentelemetry-cpp/pull/3630)
* Bump github/codeql-action from 3.30.1 to 3.30.2
[#3637](https://github.com/open-telemetry/opentelemetry-cpp/pull/3637)
* Bump step-security/harden-runner from 2.13.0 to 2.13.1
[#3636](https://github.com/open-telemetry/opentelemetry-cpp/pull/3636)
* Bump github/codeql-action from 3.30.2 to 3.30.3
[#3639](https://github.com/open-telemetry/opentelemetry-cpp/pull/3639)
* [Metrics] New Attribute Processor for Exclude list
[#3633](https://github.com/open-telemetry/opentelemetry-cpp/pull/3633)
* Implementing configurable aggregation cardinality limit
[#3624](https://github.com/open-telemetry/opentelemetry-cpp/pull/3624)
* [CMAKE] Fix CMake 4.x build error on MacOS runner and when building opentracing
[#3649](https://github.com/open-telemetry/opentelemetry-cpp/pull/3649)
* [SDK] custom hash and equality for attribute processor
[#3643](https://github.com/open-telemetry/opentelemetry-cpp/pull/3643)
* Bump actions/cache from 4.2.4 to 4.3.0
[#3658](https://github.com/open-telemetry/opentelemetry-cpp/pull/3658)
* [SDK] Fix copying overflow attributes in metric AttributesHashMap
[#3651](https://github.com/open-telemetry/opentelemetry-cpp/pull/3651)
Important changes:
* [CMAKE] Upgrade CMake minimum version to 3.16
[#3599](https://github.com/open-telemetry/opentelemetry-cpp/pull/3599)
* [BUILD] Use -dev versions in main branch
[#3609](https://github.com/open-telemetry/opentelemetry-cpp/pull/3609)
* The version number in the main branch has changed,
to better differentiate with the latest release.
* For example:
* With a latest release 1.22.0, the main branch is 1.23.0-dev
* Upon release of 1.23.0, the main branch becomes 1.24.0-dev
Breaking changes:
* [SDK] View should not have a unit
[#3552](https://github.com/open-telemetry/opentelemetry-cpp/pull/3552)
* The `unit` parameter has been removed from the `View` constructor
and `ViewFactory::Create` methods.
* Please adjust SDK configuration code accordingly.
## [1.22.0] 2025-07-11
* [DOC] Udpate link to membership document
[#3452](https://github.com/open-telemetry/opentelemetry-cpp/pull/3452)
* [CI] build examples with IWYU
[#3450](https://github.com/open-telemetry/opentelemetry-cpp/pull/3450)
* Bump ossf/scorecard-action from 2.4.1 to 2.4.2
[#3455](https://github.com/open-telemetry/opentelemetry-cpp/pull/3455)
* [SDK] Use shared_ptr internally for AttributesProcessor to prevent use-after-free
[#3457](https://github.com/open-telemetry/opentelemetry-cpp/pull/3457)
* [CI] build iwyu
[#3459](https://github.com/open-telemetry/opentelemetry-cpp/pull/3459)
* Bump github/codeql-action from 3.28.18 to 3.28.19
[#3462](https://github.com/open-telemetry/opentelemetry-cpp/pull/3462)
* [DOC] Update doc comments to pass -WDocumention check
[#3375](https://github.com/open-telemetry/opentelemetry-cpp/pull/3375)
* [TEST] test examples in CI with CMake Part 1
[#3449](https://github.com/open-telemetry/opentelemetry-cpp/pull/3449)
* [BUILD] Allow compilation with CXX26
[#3464](https://github.com/open-telemetry/opentelemetry-cpp/pull/3464)
* [SDK] Add credentials option to OTLP gRPC client
[#3403](https://github.com/open-telemetry/opentelemetry-cpp/pull/3403)
* [CI] Remove windows 2019
[#3466](https://github.com/open-telemetry/opentelemetry-cpp/pull/3466)
* [CodeHealth] fix include-what-you-use, part 8
[#3465](https://github.com/open-telemetry/opentelemetry-cpp/pull/3465)
* [BUILD] Upgrade to opentelemetry-proto 1.7.0
[#3443](https://github.com/open-telemetry/opentelemetry-cpp/pull/3443)
* Bump github/codeql-action from 3.28.19 to 3.29.0
[#3472](https://github.com/open-telemetry/opentelemetry-cpp/pull/3472)
* Bump step-security/harden-runner from 2.12.0 to 2.12.1
[#3471](https://github.com/open-telemetry/opentelemetry-cpp/pull/3471)
* [SDK] BatchLogRecordProcessor::ForceFlush is not waking up bg thread
[#3448](https://github.com/open-telemetry/opentelemetry-cpp/pull/3448)
* [CI] rely on github installed cmake for ci runners
[#3482](https://github.com/open-telemetry/opentelemetry-cpp/pull/3482)
* [CI] Increase code coverage of iwyu and clang-tidy ci jobs
[#3469](https://github.com/open-telemetry/opentelemetry-cpp/pull/3469)
* [REMOVAL] Remove CMake option WITH_REMOVE_METER_PREVIEW
[#3476](https://github.com/open-telemetry/opentelemetry-cpp/pull/3476)
* [REMOVAL] Removed deprecated semantic convention header files
[#3475](https://github.com/open-telemetry/opentelemetry-cpp/pull/3475)
* Bump docker/setup-buildx-action from 3.10.0 to 3.11.0
[#3483](https://github.com/open-telemetry/opentelemetry-cpp/pull/3483)
* Bump docker/setup-buildx-action from 3.11.0 to 3.11.1
[#3488](https://github.com/open-telemetry/opentelemetry-cpp/pull/3488)
* [Code Health] include-what-you-use cleanup, part 9
[#3492](https://github.com/open-telemetry/opentelemetry-cpp/pull/3492)
* [CodeHealth] Fix clang-tidy warnings part 1
[#3493](https://github.com/open-telemetry/opentelemetry-cpp/pull/3493)
* [CMAKE] Add thirdparty install cmake project and install bash script
[#3486](https://github.com/open-telemetry/opentelemetry-cpp/pull/3486)
* [DOC] Update community member listings
[#3499](https://github.com/open-telemetry/opentelemetry-cpp/pull/3499)
* [CodeHealth] Fix clang-tidy warnings part 2
[#3496](https://github.com/open-telemetry/opentelemetry-cpp/pull/3496)
* [CodeHealth] Fix clang-tidy warnings part 3
[#3498](https://github.com/open-telemetry/opentelemetry-cpp/pull/3498)
* [DOC] Fix outdated community membership link
[#3500](https://github.com/open-telemetry/opentelemetry-cpp/pull/3500)
* [CONFIGURATION] File configuration - trace model
[#3467](https://github.com/open-telemetry/opentelemetry-cpp/pull/3467)
* [CONFIGURATION] File configuration - sampler model
[#3468](https://github.com/open-telemetry/opentelemetry-cpp/pull/3468)
* [BUILD] Fixes grpc linking for OTLP exporter's tests
[#3435](https://github.com/open-telemetry/opentelemetry-cpp/pull/3435)
* [CONFIGURATION] File configuration - log model
[#3473](https://github.com/open-telemetry/opentelemetry-cpp/pull/3473)
* [CONFIGURATION] File configuration - metric model
[#3474](https://github.com/open-telemetry/opentelemetry-cpp/pull/3474)
* Bump github/codeql-action from 3.29.0 to 3.29.1
[#3505](https://github.com/open-telemetry/opentelemetry-cpp/pull/3505)
* [EXPORTER] Add bytes support for OTLP recordables
[#3495](https://github.com/open-telemetry/opentelemetry-cpp/pull/3495)
* [CodeHealth] Fix clang tidy warnings part 4
[#3501](https://github.com/open-telemetry/opentelemetry-cpp/pull/3501)
* [CodeHealth] Fix clang-tidy warnings part 5
[#3506](https://github.com/open-telemetry/opentelemetry-cpp/pull/3506)
* [CI] Add minimum token permissions for all github workflow files
[#3508](https://github.com/open-telemetry/opentelemetry-cpp/pull/3508)
* Bump step-security/harden-runner from 2.12.1 to 2.12.2
[#3509](https://github.com/open-telemetry/opentelemetry-cpp/pull/3509)
* Bump github/codeql-action from 3.29.1 to 3.29.2
[#3510](https://github.com/open-telemetry/opentelemetry-cpp/pull/3510)
* [BUILD] Fixes compiling problems in NDK r27
[#3517](https://github.com/open-telemetry/opentelemetry-cpp/pull/3517)
* [CMAKE] clean up googletest and benchmark dependency management
[#3485](https://github.com/open-telemetry/opentelemetry-cpp/pull/3485)
* [CONFIGURATION] File configuration - extension model
[#3503](https://github.com/open-telemetry/opentelemetry-cpp/pull/3503)
* [CONFIGURATION] File configuration - misc model
[#3504](https://github.com/open-telemetry/opentelemetry-cpp/pull/3504)
* [CONFIGURATION] File configuration - metric aggregation model
[#3502](https://github.com/open-telemetry/opentelemetry-cpp/pull/3502)
* [CMAKE] find or fetch nlohmann-json
[#3523](https://github.com/open-telemetry/opentelemetry-cpp/pull/3523)
* [CMAKE] Address the vcpkg opentelemetry-cpp port CMake patches
[#3518](https://github.com/open-telemetry/opentelemetry-cpp/pull/3518)
* [CMAKE] Add CMake script to find or fetch prometheus-cpp
[#3522](https://github.com/open-telemetry/opentelemetry-cpp/pull/3522)
* [CMAKE] Switch opentelemetry-proto to use FetchContent
[#3524](https://github.com/open-telemetry/opentelemetry-cpp/pull/3524)
* [CMAKE] Add CMake script to find or fetch Microsoft.GSL
[#3521](https://github.com/open-telemetry/opentelemetry-cpp/pull/3521)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.36.0
[#3527](https://github.com/open-telemetry/opentelemetry-cpp/pull/3527)
* [SDK] Fixes duration overflow
[#3529](https://github.com/open-telemetry/opentelemetry-cpp/pull/3529)
* [CONFIGURATION] File configuration - yaml parser
[#3519](https://github.com/open-telemetry/opentelemetry-cpp/pull/3519)
* [CONFIGURATION] File configuration - configuration parser
[#3520](https://github.com/open-telemetry/opentelemetry-cpp/pull/3520)
* [ADMIN] Remove file .github/repository-settings.md
[#3534](https://github.com/open-telemetry/opentelemetry-cpp/pull/3534)
Important changes:
* [REMOVAL] Removed deprecated semantic convention header files
[#3475](https://github.com/open-telemetry/opentelemetry-cpp/pull/3475)
* Old semantic conventions header files have been removed,
per announcement from Nov 9, 2024, see
[#3105](https://github.com/open-telemetry/opentelemetry-cpp/pull/3105)
* Mitigation steps are repeated below, for convenience.
* Two things have changed:
* the header file to use
* the symbol name to use.
Before, the semantic convention for `url.full` was:
* declared in file `semantic_conventions.h`
* declared as symbol `SemanticConventions::kUrlFull`
Now, the `url.full` convention, which is part or the `url` group, is:
* declared in file `semconv/url_attributes.h`
* declared as symbol `semconv::url::kUrlFull`
Application code that uses semantic conventions must be adjusted
accordingly.
In addition, semantic conventions that are not marked as stable
are generated in a different header file, placed under directory
`incubating`, to better separate stable and non stable code.
For example, file `semconv/incubating/url_attributes.h`
defines `semconv::url::kUrlDomain`,
which is not marked as stable in semconv v1.27.0
## [1.21.0] 2025-05-28
* [BUILD] Remove WITH_ABSEIL
[#3318](https://github.com/open-telemetry/opentelemetry-cpp/pull/3318)
* [INSTALL] Add CMake components to the opentelemetry-cpp package
[#3320](https://github.com/open-telemetry/opentelemetry-cpp/pull/3220)
* [CI] Harden GitHub Actions
[#3338](https://github.com/open-telemetry/opentelemetry-cpp/pull/3338)
* [StepSecurity] Harden GibHub Actions, part 2
[#3340](https://github.com/open-telemetry/opentelemetry-cpp/pull/3340)
* Bump github/codeql-action from 3.28.12 to 3.28.13
[#3341](https://github.com/open-telemetry/opentelemetry-cpp/pull/3341)
* [DEVCONTAINER] expose cmake version setting as docker arg and environment variable
[#3347](https://github.com/open-telemetry/opentelemetry-cpp/pull/3347)
* [CI] disable bzip2 in conan builds
[#3352](https://github.com/open-telemetry/opentelemetry-cpp/pull/3352)
* [SEMANTIC CONVENTIONS] Upgrade semantic conventions to 1.32.0
[#3351](https://github.com/open-telemetry/opentelemetry-cpp/pull/3351)
* Bump github/codeql-action from 3.28.13 to 3.28.15
[#3353](https://github.com/open-telemetry/opentelemetry-cpp/pull/3353)
* [CMAKE] bump cmake minimum required version to 3.14
[#3349](https://github.com/open-telemetry/opentelemetry-cpp/pull/3349)
* Bump codecov/codecov-action from 5.4.0 to 5.4.2
[#3362](https://github.com/open-telemetry/opentelemetry-cpp/pull/3362)
* [DOC] Fix documentation tags in logger API
[#3371](https://github.com/open-telemetry/opentelemetry-cpp/pull/3371)
* [CI] fix artifacts download/upload
[#3369](https://github.com/open-telemetry/opentelemetry-cpp/pull/3369)
* [API] Add Enabled method to Tracer
[#3357](https://github.com/open-telemetry/opentelemetry-cpp/pull/3357)
* [BUILD] Fixes warnings of ciso646 in C++17
[#3360](https://github.com/open-telemetry/opentelemetry-cpp/pull/3360)
* Bump github/codeql-action from 3.28.15 to 3.28.16
[#3377](https://github.com/open-telemetry/opentelemetry-cpp/pull/3377)
* Bump step-security/harden-runner from 2.11.1 to 2.12.0
[#3373](https://github.com/open-telemetry/opentelemetry-cpp/pull/3373)
* Bump docker/build-push-action from 6.15.0 to 6.16.0
[#3382](https://github.com/open-telemetry/opentelemetry-cpp/pull/3382)
* Bump actions/download-artifact from 4.2.1 to 4.3.0
[#3381](https://github.com/open-telemetry/opentelemetry-cpp/pull/3381)
* [CI] Harden Github actions - pinned-dependencies (part -1)
[#3380](https://github.com/open-telemetry/opentelemetry-cpp/pull/3380)
* [StepSecurity] ci: Harden GitHub Actions
[#3378](https://github.com/open-telemetry/opentelemetry-cpp/pull/3378)
* [SDK] Base2 exponential histogram aggregation
[#3346](https://github.com/open-telemetry/opentelemetry-cpp/pull/3346)
* [StepSecurity] ci: Harden GitHub Actions
[#3379](https://github.com/open-telemetry/opentelemetry-cpp/pull/3379)
* [BUILD] Fixes glibc++ 5 checking
[#3355](https://github.com/open-telemetry/opentelemetry-cpp/pull/3355)
* [TEST] Add stress test for histogram metric for multiple threads validation
[#3388](https://github.com/open-telemetry/opentelemetry-cpp/pull/3388)
* Bump github/codeql-action from 3.28.16 to 3.28.17
[#3389](https://github.com/open-telemetry/opentelemetry-cpp/pull/3389)
* [SDK] Optimize PeriodicExportingMetricReader Thread Usage
[#3383](https://github.com/open-telemetry/opentelemetry-cpp/pull/3383)
* [Metrics SDK] Use nostd::function_ref in AttributesHashMap
[#3393](https://github.com/open-telemetry/opentelemetry-cpp/pull/3393)
* [SDK] support aggregation of identical instruments
[#3358](https://github.com/open-telemetry/opentelemetry-cpp/pull/3358)
* [BUILD] Fixes unused var
[#3397](https://github.com/open-telemetry/opentelemetry-cpp/pull/3397)
* [INSTALL] Unify cmake install functions and dynamically set component dependencies
[#3368](https://github.com/open-telemetry/opentelemetry-cpp/pull/3368)
* [BUILD] Upgrade nlohmann_json to 3.12.0
[#3406](https://github.com/open-telemetry/opentelemetry-cpp/pull/3406)
* [BUILD] Upgrade opentelemetry-proto to 1.6.0
[#3407](https://github.com/open-telemetry/opentelemetry-cpp/pull/3407)
* [CMAKE] add generated protobuf headers to the opentelemetry_proto target
[#3400](https://github.com/open-telemetry/opentelemetry-cpp/pull/3400)
* [MERGE] Fix accidental rollback of nlohmann-json submodule
[#3415](https://github.com/open-telemetry/opentelemetry-cpp/pull/3415)
* Bump fossas/fossa-action from 1.6.0 to 1.7.0
[#3414](https://github.com/open-telemetry/opentelemetry-cpp/pull/3414)
* Bump docker/build-push-action from 6.16.0 to 6.17.0
[#3420](https://github.com/open-telemetry/opentelemetry-cpp/pull/3420)
* Bump codecov/codecov-action from 5.4.2 to 5.4.3
[#3419](https://github.com/open-telemetry/opentelemetry-cpp/pull/3419)
* [SEMANTIC CONVENTIONS] Upgrade semantic conventions to 1.33
[#3416](https://github.com/open-telemetry/opentelemetry-cpp/pull/3416)
* [DOCS] update the INSTALL guide on cmake components
[#3422](https://github.com/open-telemetry/opentelemetry-cpp/pull/3422)
* Bump github/codeql-action from 3.28.17 to 3.28.18
[#3423](https://github.com/open-telemetry/opentelemetry-cpp/pull/3423)
* [CMAKE] update cmake files in examples directory
[#3421](https://github.com/open-telemetry/opentelemetry-cpp/pull/3421)
* [SDK] Fix Base2ExponentialHistogramAggregation Merge with empty buckets
[#3425](https://github.com/open-telemetry/opentelemetry-cpp/pull/3425)
* [SDK] Fix MetricProducer interface
[#3413](https://github.com/open-telemetry/opentelemetry-cpp/pull/3413)
* [CMAKE] remove global include_directories usage and rely on target properties
[#3426](https://github.com/open-telemetry/opentelemetry-cpp/pull/3426)
* [BUILD] remove unused WITH_CURL build flag
[#3429](https://github.com/open-telemetry/opentelemetry-cpp/pull/3429)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.34.0
[#3428](https://github.com/open-telemetry/opentelemetry-cpp/pull/3428)
* [EXPORTER] ostream log exporter, fix memory ownership issues
[#3417](https://github.com/open-telemetry/opentelemetry-cpp/pull/3417)
* [TEST] add all components to the cmake fetch content test
[#3433](https://github.com/open-telemetry/opentelemetry-cpp/pull/3433)
* [BUILD] Error out when building DLL without MSVC
[#3438](https://github.com/open-telemetry/opentelemetry-cpp/pull/3438)
* [BUILD] Add missing CMake keyword for target_link_libraries
[#3442](https://github.com/open-telemetry/opentelemetry-cpp/pull/3442)
* [CMAKE] Remove third-party version mismatch warning
[#3432](https://github.com/open-telemetry/opentelemetry-cpp/pull/3432)
* Bump docker/build-push-action from 6.17.0 to 6.18.0
[#3446](https://github.com/open-telemetry/opentelemetry-cpp/pull/3446)
* [SEMANTIC CONVENTIONS] Fix comment style to preserve markup.
[#3444](https://github.com/open-telemetry/opentelemetry-cpp/pull/3444)
* [EXPORTER] support unix sockets in grpc client
[#3410](https://github.com/open-telemetry/opentelemetry-cpp/pull/3410)
* [BUILD] Propagate INTERFACE_COMPILE_DEFINITIONS from API through common_foo_library
[#3440](https://github.com/open-telemetry/opentelemetry-cpp/pull/3440)
New Features:
* [SDK] Base2 exponential histogram aggregation
[#3346](https://github.com/open-telemetry/opentelemetry-cpp/pull/3346)
* Add base2 exponential histogram aggregation. Includes a new aggregation type,
ostream exporter, and otlp/grpc exporter. Updated histogram aggregation and
benchmark tests.
Important changes:
* [EXPORTER] ostream log exporter, fixed memory ownership issues
[#3417](https://github.com/open-telemetry/opentelemetry-cpp/pull/3417)
* In the SDK, the following classes implementation has changed:
* opentelemetry::sdk::logs::ReadableLogRecord
* opentelemetry::sdk::logs::ReadWriteLogRecord
* An application implementing a custom log record exporter,
that reuses these classes from the opentelemetry-cpp SDK,
will need code adjustments, in particular for methods:
* GetBody()
* GetAttributes()
* Applications not using these SDK classes directly are not affected.
* [BUILD] Remove WITH_ABSEIL
[#3318](https://github.com/open-telemetry/opentelemetry-cpp/pull/3318)
* The build option `WITH_ABSEIL` is no longer used, and opentelemetry-cpp
will no longer use any release of abseil provided externally,
for its own use.
* Instead, opentelemetry-cpp will only use an internal abseil version.
* This change resolves long standing binary integrity issues,
that occurred in the past when mixing several versions of abseil
in the build.
## [1.20.0] 2025-04-01
* [BUILD] Update opentelemetry-proto version
[#3254](https://github.com/open-telemetry/opentelemetry-cpp/pull/3254)
* [BUILD] Build break with CURL 7.29.0
[#3255](https://github.com/open-telemetry/opentelemetry-cpp/pull/3255)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.30.0
[#3258](https://github.com/open-telemetry/opentelemetry-cpp/pull/3258)
* [SDK] Add tracer scope configurator
[#3137](https://github.com/open-telemetry/opentelemetry-cpp/pull/3137)
* [DOC] Add document and example for sharing gRPC Client
[#3260](https://github.com/open-telemetry/opentelemetry-cpp/pull/3260)
* [SDK] Fix BatchLogRecordProcessor to instrument shutdown
[#3262](https://github.com/open-telemetry/opentelemetry-cpp/pull/3262)
* [SDK] Support OTEL_SDK_DISABLED environment variable
[#3245](https://github.com/open-telemetry/opentelemetry-cpp/pull/3245)
* [CI] OTLP in Windows builds
[#3263](https://github.com/open-telemetry/opentelemetry-cpp/pull/3263)
* [BUILD] Fixes compatibility of type_traits
[#3274](https://github.com/open-telemetry/opentelemetry-cpp/pull/3274)
* [BUILD] Fix compilation with Regex being disabled
[#3276](https://github.com/open-telemetry/opentelemetry-cpp/pull/3276)
* [EXPORTER] Support exporting event_name using OTLP Exporter
[#3277](https://github.com/open-telemetry/opentelemetry-cpp/pull/3277)
* [CI] Add FOSSA scanning workflow
[#3279](https://github.com/open-telemetry/opentelemetry-cpp/pull/3279)
* [BUILD] Adding typecast without whom c++latest build fails
[#3281](https://github.com/open-telemetry/opentelemetry-cpp/pull/3281)
* [ADMIN] Add FOSSA badges
[#3280](https://github.com/open-telemetry/opentelemetry-cpp/pull/3280)
* [BUILD] Fix compiling problems with abiv2 and MSVC
[#3284](https://github.com/open-telemetry/opentelemetry-cpp/pull/3284)
* [BUILD] Enable old behavior of CMP0092
[#3269](https://github.com/open-telemetry/opentelemetry-cpp/pull/3269)
* [SDK] Add meter scope configurator
[#3268](https://github.com/open-telemetry/opentelemetry-cpp/pull/3268)
* [DEVCONTAINER] Support customization and run as non-root user
[#3270](https://github.com/open-telemetry/opentelemetry-cpp/pull/3270)
* [ETW] Add configuration to export 64-bit integer as timestamp
[#3286](https://github.com/open-telemetry/opentelemetry-cpp/pull/3286)
* [API] Deprecate event logger
[#3285](https://github.com/open-telemetry/opentelemetry-cpp/pull/3285)
* [BUILD] Add link directory to support curl 8.12
[#3272](https://github.com/open-telemetry/opentelemetry-cpp/pull/3272)
* [API] Change the param-pack unpacking order to start from left to right
[#3296](https://github.com/open-telemetry/opentelemetry-cpp/pull/3296)
* [SDK] Implement spec: MetricFilter
[#3235](https://github.com/open-telemetry/opentelemetry-cpp/pull/3235)
* [SEMANTIC CONVENTIONS] Upgrade semantic conventions to 1.31.0
[#3297](https://github.com/open-telemetry/opentelemetry-cpp/pull/3297)
* [SDK] Add logger scope configurator
[#3282](https://github.com/open-telemetry/opentelemetry-cpp/pull/3282)
* [EXAMPLE] fix buffer overrun in the gRPC sample project
[#3304](https://github.com/open-telemetry/opentelemetry-cpp/pull/3304)
* [CI] Bump fossas/fossa-action from 1.5.0 to 1.6.0
[#3305](https://github.com/open-telemetry/opentelemetry-cpp/pull/3305)
* [TEST] fix segfault in singleton test with cmake on macos-latest
[#3316](https://github.com/open-telemetry/opentelemetry-cpp/pull/3316)
* [TEST] fix test failure with elasticsearch exporter on cxx20
[#3308](https://github.com/open-telemetry/opentelemetry-cpp/pull/3308)
* [TEST] otlp grpc exporter retry test fix
[#3311](https://github.com/open-telemetry/opentelemetry-cpp/pull/3311)
* [SDK] Use OPENTELEMETRY_EXPORT and static local variables
[#3314](https://github.com/open-telemetry/opentelemetry-cpp/pull/3314)
* [BUILD] Fix elasticsearch exporter json compatibility
[#3313](https://github.com/open-telemetry/opentelemetry-cpp/pull/3313)
* [BUILD] Fix missing exported definition for OTLP file exporter and forceflush
[#3319](https://github.com/open-telemetry/opentelemetry-cpp/pull/3319)
* [BUILD] Remove gRPC header including in OtlpGrpcClientFactory
[#3321](https://github.com/open-telemetry/opentelemetry-cpp/pull/3321)
* [ADMIN] Add Pranav Sharma in cpp-approvers
[#3323](https://github.com/open-telemetry/opentelemetry-cpp/pull/3323)
* [DEVCONTAINER] fix grpc install
[#3325](https://github.com/open-telemetry/opentelemetry-cpp/pull/3325)
* [ADMIN] Add dbarker to approvers
[#3331](https://github.com/open-telemetry/opentelemetry-cpp/pull/3331)
* [CI] Upgrade CI to ubuntu 22.04
[#3330](https://github.com/open-telemetry/opentelemetry-cpp/pull/3330)
* [CI] Add ossf-scorecard scanning workflow
[#3332](https://github.com/open-telemetry/opentelemetry-cpp/pull/3332)
* [CI] pin cmake in ci and devcontainer
[#3336](https://github.com/open-telemetry/opentelemetry-cpp/pull/3336)
* [METRICS SDK] Fix hash collision in MetricAttributes
[#3322](https://github.com/open-telemetry/opentelemetry-cpp/pull/3322)
Important changes:
* [SDK] Support OTEL_SDK_DISABLED environment variable
[#3245](https://github.com/open-telemetry/opentelemetry-cpp/pull/3245)
* The SDK now exposes the following new methods:
* opentelemetry::sdk::trace::Provider::SetTracerProvider()
* opentelemetry::sdk::metrics::Provider::SetMeterProvider()
* opentelemetry::sdk::logs::Provider::SetLoggerProvider()
* These methods do support the `OTEL_SDK_DISABLED` environment variable,
unlike the corresponding existing API Provider classes.
* Applications are encouraged to migrate from the API to the SDK
`Provider` classes, to benefit from this feature.
* All the example code has been updated to reflect the new usage.
## [1.19.0] 2025-01-22
* [PROMETHEUS_EXPORTER] Fix default for emitting otel_scope attributes
[#3171](https://github.com/open-telemetry/opentelemetry-cpp/pull/3171)
* [Code health] Include what you use cleanup, part 5
[#3140](https://github.com/open-telemetry/opentelemetry-cpp/pull/3140)
* [BUILD] Upgrade cmake
[#3167](https://github.com/open-telemetry/opentelemetry-cpp/pull/3167)
* [SHIM] Fix string_view mappings between OT and OTel
[#3181](https://github.com/open-telemetry/opentelemetry-cpp/pull/3181)
* [EXPORTER] Refactor ElasticSearchRecordable
[#3164](https://github.com/open-telemetry/opentelemetry-cpp/pull/3164)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.29.0
[#3182](https://github.com/open-telemetry/opentelemetry-cpp/pull/3182)
* [BUILD] Fix cross-compilation with protoc
[#3186](https://github.com/open-telemetry/opentelemetry-cpp/pull/3186)
* [Code health] Perform cppcheck cleanup
[#3150](https://github.com/open-telemetry/opentelemetry-cpp/pull/3150)
* [EXPORTER] add instrumentation scope attributes
to otlp proto messages for traces and metrics
[#3185](https://github.com/open-telemetry/opentelemetry-cpp/pull/3185)
* [SDK] Tracer provider shutdown blocks in-definitively
[#3191](https://github.com/open-telemetry/opentelemetry-cpp/pull/3191)
* [SEMANTIC CONVENTIONS] Upgrade to weaver 0.11.0
[#3194](https://github.com/open-telemetry/opentelemetry-cpp/pull/3194)
* [DOC] Update existing maintaining dependencies doc
[#3195](https://github.com/open-telemetry/opentelemetry-cpp/pull/3195)
* [TEST] Change is_called_ and got_response_ to use atomic
[#3204](https://github.com/open-telemetry/opentelemetry-cpp/pull/3204)
* [SEMANTIC CONVENTIONS] update links to openmetrics to reference the v1.0.0 release
[#3205](https://github.com/open-telemetry/opentelemetry-cpp/pull/3205)
* [CI] Fix CI on ubuntu-latest
[#3207](https://github.com/open-telemetry/opentelemetry-cpp/pull/3207)
* [BUILD] Build break using protoc 3.14
[#3211](https://github.com/open-telemetry/opentelemetry-cpp/pull/3211)
* [TEST] Build the singleton test on windows
[#3183](https://github.com/open-telemetry/opentelemetry-cpp/pull/3183)
* [BUILD] Add cxx feature detections
[#3203](https://github.com/open-telemetry/opentelemetry-cpp/pull/3203)
* [SDK] Do not frequently create and destroy http client threads
[#3198](https://github.com/open-telemetry/opentelemetry-cpp/pull/3198)
* [EXPORTER] Optimize OTLP HTTP compression
[#3178](https://github.com/open-telemetry/opentelemetry-cpp/pull/3178)
* [SDK] Fix include instrumentation scope attributes in equal method
[#3214](https://github.com/open-telemetry/opentelemetry-cpp/pull/3214)
* Upgrade to opentelemetry-proto 1.5.0
[#3210](https://github.com/open-telemetry/opentelemetry-cpp/pull/3210)
* [TEST] Added support for SELINUX in functional tests
[#3212](https://github.com/open-telemetry/opentelemetry-cpp/pull/3212)
* [EDITORIAL] fix changelog entry for PR 3185
[#3217](https://github.com/open-telemetry/opentelemetry-cpp/pull/3217)
* [TEST] Functional tests for OTLP/gRPC with mutual TLS
[#3227](https://github.com/open-telemetry/opentelemetry-cpp/pull/3227)
* [SEMCONV] Metrics are incorrectly prefixed with 'metric'
[#3228](https://github.com/open-telemetry/opentelemetry-cpp/pull/3228)
* [BUILD] Add OTLP/file exporter for dll and examples
[#3231](https://github.com/open-telemetry/opentelemetry-cpp/pull/3231)
* [Code Health] Include what you use, part 6
[#3216](https://github.com/open-telemetry/opentelemetry-cpp/pull/3216)
* [CI] Spurious test failures
[#3233](https://github.com/open-telemetry/opentelemetry-cpp/pull/3233)
* [BUILD] Fix error ‘uint8_t’ does not name a type with gcc-15
[#3240](https://github.com/open-telemetry/opentelemetry-cpp/pull/3240)
* [EXPORTER] fix throw in OtlpGrpcMetricExporter with shared grpc client
[#3243](https://github.com/open-telemetry/opentelemetry-cpp/pull/3243)
* [SDK] Better control of threads executed by opentelemetry-cpp
[#3175](https://github.com/open-telemetry/opentelemetry-cpp/pull/3175)
* [Code Health] Include what you use, part 7
[#3238](https://github.com/open-telemetry/opentelemetry-cpp/pull/3238)
* [SDK] Fix lifetime of GlobalLogHandler
[#3221](https://github.com/open-telemetry/opentelemetry-cpp/pull/3221)
* [MAINTAINER] Add devcontainer
[#3123](https://github.com/open-telemetry/opentelemetry-cpp/pull/3123)
* [SDK] enable deriving from ResourceDetector to create a Resource
[#3247](https://github.com/open-telemetry/opentelemetry-cpp/pull/3247)
* [EXPORTER] Support handling retry-able errors for OTLP/HTTP
[#3223](https://github.com/open-telemetry/opentelemetry-cpp/pull/3223)
* [CI] Add GRPC in maintainer CI
[#3248](https://github.com/open-telemetry/opentelemetry-cpp/pull/3248)
* [EXPORTER] Support handling retry-able errors for OTLP/gRPC
[#3219](https://github.com/open-telemetry/opentelemetry-cpp/pull/3219)
* [SDK] Optimize Metric Processing for Single Collector with Delta Temporality
[#3236](https://github.com/open-telemetry/opentelemetry-cpp/pull/3236)
New features:
* [SDK] Better control of threads executed by opentelemetry-cpp
[#3175](https://github.com/open-telemetry/opentelemetry-cpp/pull/3175)
* This feature provides a way for applications,
when configuring the SDK and exporters,
to participate in the execution path
of internal opentelemetry-cpp threads.
* The opentelemetry-cpp library provides the following:
* a new ThreadInstrumentation interface,
* new runtime options structures, to optionally configure the SDK:
* BatchSpanProcessorRuntimeOptions
* PeriodicExportingMetricReaderRuntimeOptions
* BatchLogRecordProcessorRuntimeOptions
* new runtime options structures,
to optionally configure the OTLP HTTP exporters:
* OtlpHttpExporterRuntimeOptions
* OtlpHttpMetricExporterRuntimeOptions
* OtlpHttpLogRecordExporterRuntimeOptions
* new ThreadInstrumentation parameters,
to optionally configure the CURL HttpClient
* new runtime options structures,
to optionally configure the OTLP FILE exporters:
* OtlpFileExporterRuntimeOptions
* OtlpFileMetricExporterRuntimeOptions
* OtlpFileLogRecordExporterRuntimeOptions
* new runtime options structure,
to optionally configure the OTLP FILE client:
* OtlpFileClientRuntimeOptions
* Using the optional runtime options structures,
an application can subclass the ThreadInstrumentation interface,
and be notified of specific events of interest during the execution
of an internal opentelemetry-cpp thread.
* This allows an application to call, for example:
* pthread_setaffinity_np(), for better performances,
* setns(), to control the network namespace used by HTTP CURL connections
* pthread_setname_np(), for better observability from the operating system
* many more specific apis, as needed
* See the documentation for ThreadInstrumentation for details.
* A new example program, example_otlp_instrumented_http,
shows how to use the feature,
and add application logic in the thread execution code path.
* Note that this feature is experimental,
protected by a WITH_THREAD_INSTRUMENTATION_PREVIEW
flag in CMake. Various runtime options structures,
as well as the thread instrumentation interface,
may change without notice before this feature is declared stable.
* [EXPORTER] Support handling retry-able errors for OTLP/HTTP
[#3223](https://github.com/open-telemetry/opentelemetry-cpp/pull/3223)
* This feature is experimental,
protected by a WITH_OTLP_RETRY_PREVIEW
flag in CMake.
* [EXPORTER] Support handling retry-able errors for OTLP/gRPC
[#3219](https://github.com/open-telemetry/opentelemetry-cpp/pull/3219)
* This feature is experimental,
protected by a WITH_OTLP_RETRY_PREVIEW
flag in CMake.
## [1.18.0] 2024-11-25
* [EXPORTER] Fix crash in ElasticsearchLogRecordExporter
[#3082](https://github.com/open-telemetry/opentelemetry-cpp/pull/3082)
* [BUILD] Avoid buggy warning with gcc <= 8
[#3087](https://github.com/open-telemetry/opentelemetry-cpp/pull/3087)
* [API] Jaeger Propagator should not be deprecated
[#3086](https://github.com/open-telemetry/opentelemetry-cpp/pull/3086)
* Update bzlmod version
[#3093](https://github.com/open-telemetry/opentelemetry-cpp/pull/3093)
* [BUILD] Remove std::make_unique
[#3098](https://github.com/open-telemetry/opentelemetry-cpp/pull/3098)
* [BUILD] Fix compiling problems for gcc 4.8
[#3100](https://github.com/open-telemetry/opentelemetry-cpp/pull/3100)
* [TEST] Fix linking order and gmock linking
[#3106](https://github.com/open-telemetry/opentelemetry-cpp/pull/3106)
* [EXPORTER] Add config options to prometheus exporter
[#3104](https://github.com/open-telemetry/opentelemetry-cpp/pull/3104)
* [BUILD] Add a CMake option to disable shared libs
[#3095](https://github.com/open-telemetry/opentelemetry-cpp/pull/3095)
* [EXPORTER] Remove out of date ETW exporter doc
[#3103](https://github.com/open-telemetry/opentelemetry-cpp/pull/3103)
* [EXPORTER] Add logging for async gRPC errors
[#3108](https://github.com/open-telemetry/opentelemetry-cpp/pull/3108)
* [BUILD] Remove aligned_storage from nostd
[#3112](https://github.com/open-telemetry/opentelemetry-cpp/pull/3112)
* [EXPORTER] Elastic Search exporter follow ECS guidelines
[#3107](https://github.com/open-telemetry/opentelemetry-cpp/pull/3107)
* [INSTALL] Resolve dependencies in opentelemetry-cpp-config.cmake
[#3094](https://github.com/open-telemetry/opentelemetry-cpp/pull/3094)
* [API] Add synchronous gauge
[#3029](https://github.com/open-telemetry/opentelemetry-cpp/pull/3029)
* [BUILD] allow building with -DWITH_OTLP_HTTP_COMPRESSION=OFF without zlib
[#3120](https://github.com/open-telemetry/opentelemetry-cpp/pull/3120)
* [CI] Comment the arm64 CI
[#3125](https://github.com/open-telemetry/opentelemetry-cpp/pull/3125)
* [API] Comply with W3C Trace Context
[#3115](https://github.com/open-telemetry/opentelemetry-cpp/pull/3115)
* [EXPORTER] bump prometheus to v1.3.0
[#3122](https://github.com/open-telemetry/opentelemetry-cpp/pull/3122)
* [EXPORTER] Log SSL Connection Information
[#3113](https://github.com/open-telemetry/opentelemetry-cpp/pull/3113)
* [BUILD] Improve how to handle yield() in ARM
[#3129](https://github.com/open-telemetry/opentelemetry-cpp/pull/3129)
* [BUILD] Fix -Wmissing-template-arg-list-after-template-kw warning
[#3133](https://github.com/open-telemetry/opentelemetry-cpp/pull/3133)
* [EXPORTER]: Elasticsearch exporter put log resource in root instead of under 'resources'
[#3131](https://github.com/open-telemetry/opentelemetry-cpp/pull/3131)
* [TEST] Rename w3c_tracecontext_test to w3c_tracecontext_http_test_server
[#3132](https://github.com/open-telemetry/opentelemetry-cpp/pull/3132)
* [BUILD] Patches for building on AIX
[#3127](https://github.com/open-telemetry/opentelemetry-cpp/pull/3127)
* [SEMANTIC CONVENTIONS] Migration to weaver
[#3105](https://github.com/open-telemetry/opentelemetry-cpp/pull/3105)
* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.28.0
[#3139](https://github.com/open-telemetry/opentelemetry-cpp/pull/3139)
* [EXPORTER] handling of invalid ports in UrlParser
[#3142](https://github.com/open-telemetry/opentelemetry-cpp/pull/3142)
* [CI] speed up clang-tidy workflow
[#3148](https://github.com/open-telemetry/opentelemetry-cpp/pull/3148)
* [EXPORTER] Allow to share gRPC clients between OTLP exporters
[#3041](https://github.com/open-telemetry/opentelemetry-cpp/pull/3041)
* Bump codecov/codecov-action from 4 to 5
[#3143](https://github.com/open-telemetry/opentelemetry-cpp/pull/3143)
* [CI] Add cppcheck in the build
[#3151](https://github.com/open-telemetry/opentelemetry-cpp/pull/3151)
* [BUILD] Fix error message
[#3152](https://github.com/open-telemetry/opentelemetry-cpp/pull/3152)
* [EXPORTER] fix clang-tidy warnings in UrlParser
[#3146](https://github.com/open-telemetry/opentelemetry-cpp/pull/3146)
* [EXPORTER] Upgrade to opentelemetry-proto 1.4.0
[#3157](https://github.com/open-telemetry/opentelemetry-cpp/pull/3157)
* [TEST] refactor UrlParser tests to use value-paramterized tests
[#3153](https://github.com/open-telemetry/opentelemetry-cpp/pull/3153)
* [TEST] add a test for ElasticSearchRecordable
[#3154](https://github.com/open-telemetry/opentelemetry-cpp/pull/3154)
* [BUILD] Fix missing dependency on protoc compiler
[#3159](https://github.com/open-telemetry/opentelemetry-cpp/pull/3159)
* [bazel] Update prometheus-cpp in MODULE.bazel
[#3162](https://github.com/open-telemetry/opentelemetry-cpp/pull/3162)
* [bazel] Enable --incompatible_disallow_empty_glob
[#2642](https://github.com/open-telemetry/opentelemetry-cpp/pull/2642)
* [INSTALL] Fix cmake/opentelemetry-cpp-config.cmake.in
[#3165](https://github.com/open-telemetry/opentelemetry-cpp/pull/3165)
* [BUILD] Do not set OTELCPP_PROTO_PATH in the CMake cache
[#3160](https://github.com/open-telemetry/opentelemetry-cpp/pull/3160)
* [BUILD] Fix build for esp32
[#3155](https://github.com/open-telemetry/opentelemetry-cpp/pull/3155)
* [bazel] Update opentelemetry-proto in MODULE.bazel
[#3163](https://github.com/open-telemetry/opentelemetry-cpp/pull/3163)
Important changes:
* [API] Jaeger Propagator should not be deprecated
[#3086](https://github.com/open-telemetry/opentelemetry-cpp/pull/3086)
* Deprecation of the Jaeger propagator, as announced on 2023-01-31
in version 1.8.2, is now reverted.
* This deprecation turned out to be not justified,
as the Jaeger propagator can be used without the (now removed)
Jaeger exporter.
* [EXPORTER] Change log resources location for ElasticsearchLogRecordExporter
[#3119](https://github.com/open-telemetry/opentelemetry-cpp/pull/3131)
* Moved from `root/resources` to `root`
* [SEMANTIC CONVENTIONS] Migration to weaver
[#3105](https://github.com/open-telemetry/opentelemetry-cpp/pull/3105)
* `semantic_convention.h` header files are deprecated,
replaced by `semconv/xxx_attributes.h` header files,
for each `xxx` semantic attribute group.
* See file DEPRECATED.md for details.
Deprecations:
* This release contains deprecations, see file DEPRECATED.md for details.
## [1.17.0] 2024-10-07
* [CI] Add a clang-tidy build
[#3001](https://github.com/open-telemetry/opentelemetry-cpp/pull/3001)
* [BUILD] Upgrade to opentelemetry-proto 1.3.2
[#2991](https://github.com/open-telemetry/opentelemetry-cpp/pull/2991)
* [REMOVAL] Remove build option `WITH_DEPRECATED_SDK_FACTORY`
[#2717](https://github.com/open-telemetry/opentelemetry-cpp/pull/2717)
* [EXPORTER] ForceFlush before canceling the running requests on shutdown
[#2727](https://github.com/open-telemetry/opentelemetry-cpp/pull/2727)
* [SDK] Fix crash in PeriodicExportingMetricReader
[#2983](https://github.com/open-telemetry/opentelemetry-cpp/pull/2983)
* [SDK] Fix memory leak in TlsRandomNumberGenerator() constructor
[#2661](https://github.com/open-telemetry/opentelemetry-cpp/pull/2661)
* [EXPORTER] Ignore exception when create thread in OTLP file exporter
[#3012](https://github.com/open-telemetry/opentelemetry-cpp/pull/3012)
* [BUILD] Update the version in MODULE.bazel
[#3015](https://github.com/open-telemetry/opentelemetry-cpp/pull/3015)
* [BUILD] Fix build without vcpkg on Windows when gRPC is disabled
[#3016](https://github.com/open-telemetry/opentelemetry-cpp/pull/3016)
* [BUILD] Add abi_version_no bazel flag
[#3020](https://github.com/open-telemetry/opentelemetry-cpp/pull/3020)
* [Code health] Expand iwyu coverage to include unit tests
[#3022](https://github.com/open-telemetry/opentelemetry-cpp/pull/3022)
* [BUILD] Version opentelemetry_proto/proto_grpc shared libraries
[#2992](https://github.com/open-telemetry/opentelemetry-cpp/pull/2992)
* [SEMANTIC CONVENTIONS] Upgrade semantic conventions to 1.27.0
[#3023](https://github.com/open-telemetry/opentelemetry-cpp/pull/3023)
* [SDK] Support empty histogram buckets
[#3027](https://github.com/open-telemetry/opentelemetry-cpp/pull/3027)
* [TEST] Fix sync problems in OTLP File exporter tests
[#3031](https://github.com/open-telemetry/opentelemetry-cpp/pull/3031)
* [SDK] PeriodicExportingMetricReader: future is never set, blocks until timeout
[#3030](https://github.com/open-telemetry/opentelemetry-cpp/pull/3030)
* [Code Health] Clang Tidy cleanup, Part 2
[#3038](https://github.com/open-telemetry/opentelemetry-cpp/pull/3038)
* [Code Health] include-what-you-use cleanup, part 3
[#3004](https://github.com/open-telemetry/opentelemetry-cpp/pull/3004)
* [SDK] Fix overflow in timeout logic
[#3046](https://github.com/open-telemetry/opentelemetry-cpp/pull/3046)
* [TEST] Add missing tests to Bazel build
[#3045](https://github.com/open-telemetry/opentelemetry-cpp/pull/3045)
* [TEST] update collector tests with debug exporter
[#3050](https://github.com/open-telemetry/opentelemetry-cpp/pull/3050)
* [EXAMPLE] update collector example with debug exporter
[#3049](https://github.com/open-telemetry/opentelemetry-cpp/pull/3049)
* [TEST] update references to logging exporter
[#3053](https://github.com/open-telemetry/opentelemetry-cpp/pull/3053)
* [EXAMPLE] Clean the tracer initialization in OStream example
[#3051](https://github.com/open-telemetry/opentelemetry-cpp/pull/3051)
* [EXPORTER] Fix the format of SpanLink for ETW
[#3054](https://github.com/open-telemetry/opentelemetry-cpp/pull/3054)
* [EXPORTER] Add in-memory metric exporter
[#3043](https://github.com/open-telemetry/opentelemetry-cpp/pull/3043)
* [Code Health] include-what-you-use cleanup, part 4
[#3040](https://github.com/open-telemetry/opentelemetry-cpp/pull/3040)
* [BUILD] add loongarch info
[#3052](https://github.com/open-telemetry/opentelemetry-cpp/pull/3052)
* [CI] Update otel-collector version
[#3067](https://github.com/open-telemetry/opentelemetry-cpp/pull/3067)
* [SDK] Update MetricProducer interface to match spec
[#3044](https://github.com/open-telemetry/opentelemetry-cpp/pull/3044)
* [EXPORTER] Fix URL in ES exporter, fix ipv6 supporting for http client
[#3081](https://github.com/open-telemetry/opentelemetry-cpp/pull/3081)
* [EXPORTER] Add HttpHeaders in ElasticsearchLogRecordExporter
[#3083](https://github.com/open-telemetry/opentelemetry-cpp/pull/3083)
Breaking changes:
* [REMOVAL] Remove build option `WITH_DEPRECATED_SDK_FACTORY`
[#2717](https://github.com/open-telemetry/opentelemetry-cpp/pull/2717)
* As announced in opentelemetry-cpp previous release 1.16.0,
CMake option `WITH_DEPRECATED_SDK_FACTORY` was temporary,
and to be removed by the next release.
* This option is now removed.
* Code configuring the SDK must be adjusted, as previously described:
* [API/SDK] Provider cleanup
[#2664](https://github.com/open-telemetry/opentelemetry-cpp/pull/2664)
* Before this fix:
* SDK factory methods such as:
* opentelemetry::sdk::trace::TracerProviderFactory::Create()
* opentelemetry::sdk::metrics::MeterProviderFactory::Create()
* opentelemetry::sdk::logs::LoggerProviderFactory::Create()
* opentelemetry::sdk::logs::EventLoggerProviderFactory::Create()
returned an API object (opentelemetry::trace::TracerProvider)
to the caller.
* After this fix, these methods return an SDK level object
(opentelemetry::sdk::trace::TracerProvider) to the caller.
* Returning an SDK object is necessary for the application to
cleanup and invoke SDK level methods, such as ForceFlush(),
on a provider.
* The application code that configures the SDK, by calling
the various provider factories, may need adjustment.
* All the examples have been updated, and in particular no
longer perform static_cast do convert an API object to an SDK object.
Please refer to examples for guidance on how to adjust.
## [1.16.1] 2024-07-17
* [BUILD] Add bazel missing BUILD file
[#2720](https://github.com/open-telemetry/opentelemetry-cpp/pull/2720)
* [SDK] Added reserve for spans array in BatchSpanProcessor.
[#2724](https://github.com/open-telemetry/opentelemetry-cpp/pull/2724)
* [DOC] Update "Using triplets" section in building-with-vcpkg documentation.
[#2726](https://github.com/open-telemetry/opentelemetry-cpp/pull/2726)
* [DOC] Remove comment for unused LoggerProvider initialization params
[#2972](https://github.com/open-telemetry/opentelemetry-cpp/pull/2972)
* [SECURITY] Remove OTLP HTTP support for TLS 1.0 and TLS 1.1,
require TLS 1.2 or better
[#2722](https://github.com/open-telemetry/opentelemetry-cpp/pull/2722)
* [TEST] Fix opentelemetry-collector bind address
[#2989](https://github.com/open-telemetry/opentelemetry-cpp/pull/2989)
* [EXPORTER] Fix references in AttributeValueVisitor
[#2985](https://github.com/open-telemetry/opentelemetry-cpp/pull/2985)
* [Code health] include-what-you-use cleanup, part 2
[#2704](https://github.com/open-telemetry/opentelemetry-cpp/pull/2704)
* [Code Health] clang-tidy cleanup, part 1
[#2990](https://github.com/open-telemetry/opentelemetry-cpp/pull/2990)
* [CI] Build failures with ABSEIL 20240116 and CMAKE 3.30
[#3002](https://github.com/open-telemetry/opentelemetry-cpp/pull/3002)
* [CI] Enable bzlmod
[#2995](https://github.com/open-telemetry/opentelemetry-cpp/pull/2995)
* [Metrics SDK] Fix hash calculation for nostd::string
[#2999](https://github.com/open-telemetry/opentelemetry-cpp/pull/2999)
Breaking changes:
* [SECURITY] Remove OTLP HTTP support for TLS 1.0 and TLS 1.1,
require TLS 1.2 or better
[#2722](https://github.com/open-telemetry/opentelemetry-cpp/pull/2722)
* The OTLP HTTP exporter no longer accept options like:
* min_TLS = 1.0
* min_TLS = 1.1
* max_TLS = 1.0
* max_TLS = 1.1
* When connecting to an OTLP HTTP endpoint, using `https`,
the connection will require TLS 1.2 by default,
unless min_TLS is set to 1.3
* Plain `http` connections (insecure) are not affected.
## [1.16.0] 2024-06-21
* [BUILD] Upgrade bazel abseil from 20220623.1 to 20230802.2
[#2650](https://github.com/open-telemetry/opentelemetry-cpp/pull/2650)
* [BUILD] Use nostd::enable_if_t instead of std::enable_if_t
[#2648](https://github.com/open-telemetry/opentelemetry-cpp/pull/2648)
* [EXEMPLAR] Update ExemplarFilter and ExemplarReservoir for spec
[#2372](https://github.com/open-telemetry/opentelemetry-cpp/pull/2372)
* [BUILD] Link CoreFoundation on apple systems
[#2655](https://github.com/open-telemetry/opentelemetry-cpp/pull/2655)
* [SDK] Avoid missing conditional variable update and simplify atomic bool
[#2553](https://github.com/open-telemetry/opentelemetry-cpp/pull/2553)
* [BUILD] Build break in OLTP_FILE tests
[#2659](https://github.com/open-telemetry/opentelemetry-cpp/pull/2659)
* [EXPORTER] General cleanup for is_shutdown flags in exporters.
[#2663](https://github.com/open-telemetry/opentelemetry-cpp/pull/2663)
* [CI] Upgrade Maintainers CI to ubuntu-24.04
[#2670](https://github.com/open-telemetry/opentelemetry-cpp/pull/2670)
* [BUILD] Upgrade to opentelemetry-proto 1.3.1
[#2669](https://github.com/open-telemetry/opentelemetry-cpp/pull/2669)
* [API] Return NoopLogRecord from NoopLogger
[#2668](https://github.com/open-telemetry/opentelemetry-cpp/pull/2668)
* [BUILD] Remove the hard-coded separator in tracestate
[#2672](https://github.com/open-telemetry/opentelemetry-cpp/pull/2672)
* [SDK] Fix forceflush may wait for ever
[#2584](https://github.com/open-telemetry/opentelemetry-cpp/pull/2584)
* [API] DO not allow unsafe Logger::EmitLogRecord
[#2673](https://github.com/open-telemetry/opentelemetry-cpp/pull/2673)
* [BUILD] Read default proto version from third_party_release
[#2677](https://github.com/open-telemetry/opentelemetry-cpp/pull/2677)
* [CI] include-what-you-use
[#2629](https://github.com/open-telemetry/opentelemetry-cpp/pull/2629)
* [CI] Upgrade to clang-format 18
[#2684](https://github.com/open-telemetry/opentelemetry-cpp/pull/2684)
* [CI] Fix CI failures on Ubuntu 24.04
[#2686](https://github.com/open-telemetry/opentelemetry-cpp/pull/2686)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.26.0
[#2687](https://github.com/open-telemetry/opentelemetry-cpp/pull/2687)
* [API/SDK] Provider cleanup
[#2664](https://github.com/open-telemetry/opentelemetry-cpp/pull/2664)
* [ETW] Add table name mapping for Logs other than the default Log table
[#2691](https://github.com/open-telemetry/opentelemetry-cpp/pull/2691)
* [CI] Remove benchmark overlay for vcpkg
[#2695](https://github.com/open-telemetry/opentelemetry-cpp/pull/2695)
* [BUILD] Remove the incorrect set of CMAKE_MSVC_RUNTIME_LIBRARY for vcpkg
[#2696](https://github.com/open-telemetry/opentelemetry-cpp/pull/2696)
* [BUILD] CMakeLists.txt: Enable CMAKE_MSVC_RUNTIME_LIBRARY support
[#2652](https://github.com/open-telemetry/opentelemetry-cpp/pull/2652)
* [EXPORTER] OTLP file: use thread-safe file/io
[#2675](https://github.com/open-telemetry/opentelemetry-cpp/pull/2675)
* [bazel] Bump version and deps
[#2679](https://github.com/open-telemetry/opentelemetry-cpp/pull/2679)
* [BUILD] Add support for bzlmod
[#2608](https://github.com/open-telemetry/opentelemetry-cpp/pull/2608)
* [BUILD] Fix Import Abseil-cpp
[#2701](https://github.com/open-telemetry/opentelemetry-cpp/pull/2701)
* [Code health] include-what-you-use cleanup
[#2692](https://github.com/open-telemetry/opentelemetry-cpp/pull/2692)
* [BUILD] Restore Bazel flag removed from public API
[#2702](https://github.com/open-telemetry/opentelemetry-cpp/pull/2702)
* [DOC] Fix typo tace_id -> trace_id in logger.h
[#2703](https://github.com/open-telemetry/opentelemetry-cpp/pull/2703)
* Bump docker/build-push-action from 5 to 6
[#2705](https://github.com/open-telemetry/opentelemetry-cpp/pull/2705)
* [CI] Enable ARM64 build in CI
[#2699](https://github.com/open-telemetry/opentelemetry-cpp/pull/2699)
* [Code health] Remove Unicode Text from Source files
[#2707](https://github.com/open-telemetry/opentelemetry-cpp/pull/2707)
* [BUILD] Add option WITH_OTLP_GRPC_SSL_MTLS_PREVIEW
[#2714](https://github.com/open-telemetry/opentelemetry-cpp/pull/2714)
* [EXPORTER] All 2xx return codes should be considered successful.
[#2712](https://github.com/open-telemetry/opentelemetry-cpp/pull/2712)
Important changes:
* [API/SDK] Provider cleanup
[#2664](https://github.com/open-telemetry/opentelemetry-cpp/pull/2664)
* Before this fix:
* The API class `opentelemetry::trace::Tracer` exposed methods such
as `ForceFlush()`, `ForceFlushWithMicroseconds()`, `Close()`
and `CloseWithMicroseconds()`.
* These methods are meant to be used when configuring the SDK,
and should not be part of the API. Exposing them was an oversight.
* Two of these methods are virtual, and therefore part of the ABI.
* After this fix:
* In `OPENTELEMETRY_ABI_VERSION_NO 1`, nothing is changed,
because removing this code would break the ABI.
* In `OPENTELEMETRY_ABI_VERSION_NO 2`, these methods are moved
from the API to the SDK. This is a breaking change for ABI version 2,
which is still experimental.
* In all cases, instrumenting an application should not
invoke flush or close on a tracer, do not use these methods.
Breaking changes:
* [API/SDK] Provider cleanup
[#2664](https://github.com/open-telemetry/opentelemetry-cpp/pull/2664)
* Before this fix:
* SDK factory methods such as:
* opentelemetry::sdk::trace::TracerProviderFactory::Create()
* opentelemetry::sdk::metrics::MeterProviderFactory::Create()
* opentelemetry::sdk::logs::LoggerProviderFactory::Create()
* opentelemetry::sdk::logs::EventLoggerProviderFactory::Create()
returned an API object (opentelemetry::trace::TracerProvider)
to the caller.
* After this fix, these methods return an SDK level object
(opentelemetry::sdk::trace::TracerProvider) to the caller.
* Returning an SDK object is necessary for the application to
cleanup and invoke SDK level methods, such as ForceFlush(),
on a provider.
* The application code that configures the SDK, by calling
the various provider factories, may need adjustment.
* All the examples have been updated, and in particular no
longer perform static_cast do convert an API object to an SDK object.
Please refer to examples for guidance on how to adjust.
* If adjusting application code is impractical,
an alternate and temporary solution is to build with option
WITH_DEPRECATED_SDK_FACTORY=ON in CMake.
* Option WITH_DEPRECATED_SDK_FACTORY=ON will allow to build code
without application changes, posponing changes for later.
* WITH_DEPRECATED_SDK_FACTORY=ON is temporary, only to provide
an easier migration path. Expect this flag to be removed,
as early as by the next release.
Notes on experimental features:
* [#2372](https://github.com/open-telemetry/opentelemetry-cpp/issues/2372)
introduced `MeterProvider::SetExemplar()` which accepts en
`ExemplarFilterType` enumeration with `kAlwaysOff`, `kAlwaysOn` and
`kTraceBased`.
## [1.15.0] 2024-04-21
* [EXPORTER] Change OTLP HTTP content_type default to binary
[#2564](https://github.com/open-telemetry/opentelemetry-cpp/pull/2564)
* [DOC] Fix OTLP documentation: Default endpoint is wrong for OTLP/HTTP
[#2560](https://github.com/open-telemetry/opentelemetry-cpp/pull/2560)
* [BUILD] Fix old style cast warning
[#2567](https://github.com/open-telemetry/opentelemetry-cpp/pull/2567)
* [EXPORTER] Gzip compression support for OTLP/HTTP and OTLP/gRPC exporter
[#2530](https://github.com/open-telemetry/opentelemetry-cpp/pull/2530)
* [BUILD] update vcpkg submodule to 2024.02.14
[#2575](https://github.com/open-telemetry/opentelemetry-cpp/pull/2575)
* [SDK] Support for OTEL_SERVICE_NAME
[#2577](https://github.com/open-telemetry/opentelemetry-cpp/pull/2577)
* [EXPORTER] Support URL-encoded values for `OTEL_EXPORTER_OTLP_HEADERS`
[#2579](https://github.com/open-telemetry/opentelemetry-cpp/pull/2579)
* [BUILD] CMake cleanup for message()
[#2582](https://github.com/open-telemetry/opentelemetry-cpp/pull/2582)
* [BUILD] Bump CMake minimum required version to 3.9
[#2581](https://github.com/open-telemetry/opentelemetry-cpp/pull/2581)
* [BUILD] Provide LIKELY / UNLIKELY macros
[#2580](https://github.com/open-telemetry/opentelemetry-cpp/pull/2580)
* [EXPORTER] OTLP: Fix missing ResourceMetrics SchemaURL
[#2587](https://github.com/open-telemetry/opentelemetry-cpp/pull/2587)
* [ETW] cleanup include path
[#2594](https://github.com/open-telemetry/opentelemetry-cpp/pull/2594)
* Upgrade to googletest 1.14.0
[#2596](https://github.com/open-telemetry/opentelemetry-cpp/pull/2596)
* Upgrade to nlohmann_json 3.11.3
[#2595](https://github.com/open-telemetry/opentelemetry-cpp/pull/2595)
* [BAZEL] Move -std=c++14 to .bazelrc
[#2600](https://github.com/open-telemetry/opentelemetry-cpp/pull/2600)
* [BAZEL] Fix -std=c++14 warning on Windows
[#2601](https://github.com/open-telemetry/opentelemetry-cpp/pull/2601)
* Upgrade to benchmark 1.8.3
[#2597](https://github.com/open-telemetry/opentelemetry-cpp/pull/2597)
* Upgrade to prometheus 1.2.4
[#2598](https://github.com/open-telemetry/opentelemetry-cpp/pull/2598)
* [DOC] Fix typo: Asynchronouse -> Asynchronous in meter.h
[#2604](https://github.com/open-telemetry/opentelemetry-cpp/pull/2604)
* [BUILD] Do not link prometheus-cpp::util when it doesn't exist
[#2606](https://github.com/open-telemetry/opentelemetry-cpp/pull/2606)
* [SDK] Remove unused variable
[#2609](https://github.com/open-telemetry/opentelemetry-cpp/pull/2609)
* [METRICS SDK] Remove extra OfferMeasurement call
in SyncMetricsStorage::OfferMeasurement
[#2610](https://github.com/open-telemetry/opentelemetry-cpp/pull/2610)
* [MISC] Use set -e on all shell scripts and pass shellcheck --severity=error
[#2616](https://github.com/open-telemetry/opentelemetry-cpp/pull/2616)
* [CI] Add shellcheck --severity=error as a CI step
[#2618](https://github.com/open-telemetry/opentelemetry-cpp/pull/2618)
* [CI] Upgrade to abseil 20240116.1 (CMake only)
[#2599](https://github.com/open-telemetry/opentelemetry-cpp/pull/2599)
* [CI] Benchmark, provide units with --benchmark_min_time
[#2621](https://github.com/open-telemetry/opentelemetry-cpp/pull/2621)
* [EXPORTER] OTLP file exporter
[#2540](https://github.com/open-telemetry/opentelemetry-cpp/pull/2540)
* [CI] Use platform CMake
[#2627](https://github.com/open-telemetry/opentelemetry-cpp/pull/2627)
* [PROTO] Upgrade to opentelemetry-proto 1.2.0
[#2631](https://github.com/open-telemetry/opentelemetry-cpp/pull/2631)
* [SDK] DefaultLogHandler to print errors to std::cerr, add LogLevel::None
[#2622](https://github.com/open-telemetry/opentelemetry-cpp/pull/2622)
* [SEMANTIC CONVENTIONS] Upgrade to semantic convention 1.25.0
[#2633](https://github.com/open-telemetry/opentelemetry-cpp/pull/2633)
* [DOC] Add readme and examples for OTLP FILE exporters.
[#2638](https://github.com/open-telemetry/opentelemetry-cpp/pull/2638)
* [SEMANTIC CONVENTIONS] Rework on semantic conventions 1.25.0
[#2640](https://github.com/open-telemetry/opentelemetry-cpp/pull/2640)
* [DOC] Update INSTALL.md
[#2592](https://github.com/open-telemetry/opentelemetry-cpp/pull/2592)
Important changes:
* [EXPORTER] Gzip compression support for OTLP/HTTP and OTLP/gRPC exporter
[#2530](https://github.com/open-telemetry/opentelemetry-cpp/pull/2530)
* In the `OtlpHttpExporterOptions` and `OtlpGrpcExporterOptions`, a new
field called compression has been introduced. This field can be set
to "gzip” to enable gzip compression.
* The CMake option `WITH_OTLP_HTTP_COMPRESSION` is introduced to enable
gzip compression support for the OTLP HTTP Exporter and includes a
dependency on zlib.
* [SDK] Change OTLP HTTP content_type default to binary
[#2558](https://github.com/open-telemetry/opentelemetry-cpp/pull/2558)
* [CI] Use platform CMake
[#2627](https://github.com/open-telemetry/opentelemetry-cpp/pull/2627)
* The `CI` in github no longer install a different version of `cmake`.
* It now always use the `cmake` provided by the platform.
* As part of this change, the script `ci/setup_cmake.sh` was renamed
to `ci/setup_googletest.sh`, for clarity, now that this script
only installs googletest.
* [SDK] DefaultLogHandler to print to std::cerr, add LogLevel::None
[#2622](https://github.com/open-telemetry/opentelemetry-cpp/pull/2622)
* Change DefaultLogHandler output
* Before, the default internal logger, DefaultLogHandler,
used to print to std::cout.
* Now, DefaultLogHandler prints errors and warnings to std::cerr,
as expected, while printing info and debug messages to std::cout.
* Applications that expected to find the opentelemetry-cpp internal
error log in std::cout may need adjustments, either by looking
at std::cerr instead, or by using a custom log handler.
* Additional LogLevel::None
* LogLevel::None is a new supported log level, which does not print
any message.
* Custom log handlers may need to implement a new case, to avoid
compiler warnings.
* Numbering of log levels like OTEL_INTERNAL_LOG_LEVEL_ERROR
has changed, which requires to rebuild, as the SDK ABI differs.
## [1.14.2] 2024-02-27
* [SDK] Fix observable attributes drop
[#2557](https://github.com/open-telemetry/opentelemetry-cpp/pull/2557)
## [1.14.1] 2024-02-23
* [SDK] Restore Recordable API compatibility with versions < 1.14.0
[#2547](https://github.com/open-telemetry/opentelemetry-cpp/pull/2547)
* [DOC] Add missing CHANGELOG.
[#2549](https://github.com/open-telemetry/opentelemetry-cpp/pull/2549)
* [EXPORTER] Error when grpc endpoint is empty
[#2507](https://github.com/open-telemetry/opentelemetry-cpp/pull/2507)
* [DOC] Fix typo in benchmarks.rst
[#2542](https://github.com/open-telemetry/opentelemetry-cpp/pull/2542)
Important changes:
* [SDK] Restore Recordable API compatibility with versions < 1.14.0
[#2547](https://github.com/open-telemetry/opentelemetry-cpp/pull/2547)
* For third party _extending_ the SDK, release 1.14.0 introduced
an API breaking change compared to 1.13.0
* This fix restores API (but not ABI) compatibility of
release 1.14.1 with release 1.13.0.
* This allows to build a third party exporter with no source code changes,
for both releases 1.14.1 and 1.13.0.
## [1.14.0] 2024-02-16
* [BUILD] Add DLL build CI pipeline with CXX20
[#2465](https://github.com/open-telemetry/opentelemetry-cpp/pull/2465)
* [EXPORTER] Set `is_monotonic` flag for Observable Counters
[#2478](https://github.com/open-telemetry/opentelemetry-cpp/pull/2478)
* [PROTO] Upgrade to opentelemetry-proto v1.1.0
[#2488](https://github.com/open-telemetry/opentelemetry-cpp/pull/2488)
* [BUILD] Introduce CXX 20 CI pipeline for MSVC/Windows
[#2450](https://github.com/open-telemetry/opentelemetry-cpp/pull/2450)
* [API] Propagation: fix for hex conversion to binary for odd hex strings
[#2533](https://github.com/open-telemetry/opentelemetry-cpp/pull/2533)
* [DOC] Fix calendar link
[#2532](https://github.com/open-telemetry/opentelemetry-cpp/pull/2532)
* [ETW EXPORTER] Remove namespace using in ETW exporter which affects global
namespace
[#2531](https://github.com/open-telemetry/opentelemetry-cpp/pull/2531)
* [BUILD] Don't invoke vcpkg from this repo with CMAKE_TOOLCHAIN_FILE set
[#2527](https://github.com/open-telemetry/opentelemetry-cpp/pull/2527)
* [EXPORTER] Async exporting for otlp grpc
[#2407](https://github.com/open-telemetry/opentelemetry-cpp/pull/2407)
* [METRICS SDK] Fix attribute filtering for synchronous instruments.
[#2472](https://github.com/open-telemetry/opentelemetry-cpp/pull/2472)
* [BUILD] Better handling of OPENTELEMETRY_STL_VERSION under Bazel.
[#2503](https://github.com/open-telemetry/opentelemetry-cpp/pull/2503)
* [DOC] Fixes CI markdown error MD055 - Table pipe style
[#2517](https://github.com/open-telemetry/opentelemetry-cpp/pull/2517)
* [API] Propagators: do not overwrite the active span with a default invalid
span [#2511](https://github.com/open-telemetry/opentelemetry-cpp/pull/2511)
* [BUILD] Updated the recorded vcpkg submodule version
[#2513](https://github.com/open-telemetry/opentelemetry-cpp/pull/2513)
* [BUILD] Remove unnecessary usage/includes of nostd/type_traits
[#2509](https://github.com/open-telemetry/opentelemetry-cpp/pull/2509)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.24.0
[#2461](https://github.com/open-telemetry/opentelemetry-cpp/pull/2461)
* [EXAMPLES] Improve readme of Metrics example
[#2510](https://github.com/open-telemetry/opentelemetry-cpp/pull/2510)
* [BUILD] Clang-15 warning about `__has_trivial_destructor`
[#2502](https://github.com/open-telemetry/opentelemetry-cpp/pull/2502)
* [BUILD] Fix multiple assignment operators for SpinLockMutex
[#2501](https://github.com/open-telemetry/opentelemetry-cpp/pull/2501)
* [BUILD] Alternative way of exporting symbols (generating .def file)
[#2476](https://github.com/open-telemetry/opentelemetry-cpp/pull/2476)
* [CI] Make cmake.c++20*.test actually use C++20 and add cmake.c++23*.test
[#2496](https://github.com/open-telemetry/opentelemetry-cpp/pull/2496)
* [DOCUMENTATION] Add api reference documentation for logs
[#2497](https://github.com/open-telemetry/opentelemetry-cpp/pull/2497)
* [BUILD] Fix variable shadow
[#2498](https://github.com/open-telemetry/opentelemetry-cpp/pull/2498)
* [BUILD] Fix checks on __cplusplus under MSVC, do not assume /Zc
[#2493](https://github.com/open-telemetry/opentelemetry-cpp/pull/2493)
* [EXAMPLES] Use logs API instead of logs bridge API in the example
[#2494](https://github.com/open-telemetry/opentelemetry-cpp/pull/2494)
* [EXPORTER] Fix forward protocol encoding for ETW exporter
[#2473](https://github.com/open-telemetry/opentelemetry-cpp/pull/2473)
* [BUILD] Skip patch alias target
[#2457](https://github.com/open-telemetry/opentelemetry-cpp/pull/2457)
* [EXPORTER] Rename populate_otel_scope to without_otel_scope
[#2479](https://github.com/open-telemetry/opentelemetry-cpp/pull/2479)
* [EXPORTER SDK] Additional fixes after NOMINMAX removal on Windows
[#2475](https://github.com/open-telemetry/opentelemetry-cpp/pull/2475)
* [EXPORTER] Do not use regex in `CleanUpString` because some implementations of
STL may crash.
[#2464](https://github.com/open-telemetry/opentelemetry-cpp/pull/2464)
* [EXPORTER] Fix Aggregation type detection in OTLP Exporter
[#2467](https://github.com/open-telemetry/opentelemetry-cpp/pull/2467)
* [EXPORTER] Add option to disable Prometheus otel_scope_name and
otel_scope_version attributes
[#2451](https://github.com/open-telemetry/opentelemetry-cpp/pull/2451)
* [SEMANTIC CONVENTIONS] Code generation script fails on SELINUX
[#2455](https://github.com/open-telemetry/opentelemetry-cpp/pull/2455)
* [BUILD] Fix removing of NOMINMAX on Windows
[#2449](https://github.com/open-telemetry/opentelemetry-cpp/pull/2449)
* [BUILD] Accept path list in OPENTELEMETRY_EXTERNAL_COMPONENT_PATH
[#2439](https://github.com/open-telemetry/opentelemetry-cpp/pull/2439)
* [BUILD] Remove gmock from GTEST_BOTH_LIBRARIES
[#2437](https://github.com/open-telemetry/opentelemetry-cpp/pull/2437)
* [REMOVAL] Remove option WITH_OTLP_HTTP_SSL_PREVIEW
[#2435](https://github.com/open-telemetry/opentelemetry-cpp/pull/2435)
Important changes:
Breaking changes:
* [REMOVAL] Remove option WITH_OTLP_HTTP_SSL_PREVIEW
[#2435](https://github.com/open-telemetry/opentelemetry-cpp/pull/2435)
* CMake options `WITH_OTLP_HTTP_SSL_PREVIEW` and
`WITH_OTLP_HTTP_SSL_TLS_PREVIEW` are removed. Building opentelemetry-cpp
without SSL support is no longer possible.
* [PROTO] Upgrade to opentelemetry-proto v1.1.0
[#2488](https://github.com/open-telemetry/opentelemetry-cpp/pull/2488)
* Class `opentelemetry::sdk::trace::Recordable` has a new virtual method,
`SetTraceFlags()`.
* This is an incompatible change for the SDK Recordable API and ABI.
* Applications _configuring_ the SDK are not affected.
* Third parties providing SDK _extensions_ are affected,
and must provide a `SetTraceFlags()` implementation,
starting with opentelemetry-cpp 1.14.0.
## [1.13.0] 2023-12-06
* [BUILD] Remove WITH_REMOVE_METER_PREVIEW, use WITH_ABI_VERSION_2 instead
[#2370](https://github.com/open-telemetry/opentelemetry-cpp/pull/2370)
* [SDK] Metrics ObservableRegistry Cleanup
[#2376](https://github.com/open-telemetry/opentelemetry-cpp/pull/2376)
* [BUILD] Make WITH_OTLP_HTTP_SSL_PREVIEW mainstream
[#2378](https://github.com/open-telemetry/opentelemetry-cpp/pull/2378)
* [SDK] Creating DoubleUpDownCounter with no matching view
[#2379](https://github.com/open-telemetry/opentelemetry-cpp/pull/2379)
* [API] Add InstrumentationScope attributes in TracerProvider::GetTracer()
[#2371](https://github.com/open-telemetry/opentelemetry-cpp/pull/2371)
* [BUILD] DLL export interface for Metrics
[#2344](https://github.com/open-telemetry/opentelemetry-cpp/pull/2344)
* [BUILD] enum CanonicalCode names too generic... conflict with old C defines
[#2385](https://github.com/open-telemetry/opentelemetry-cpp/pull/2385)
* [BUILD] Fix cpack broken package version
[#2386](https://github.com/open-telemetry/opentelemetry-cpp/pull/2386)
* [API] Add a new AddLink() operation to Span
[#2380](https://github.com/open-telemetry/opentelemetry-cpp/pull/2380)
* [opentracing-shim] Add check for sampled context
[#2390](https://github.com/open-telemetry/opentelemetry-cpp/pull/2390)
* [BUILD] Fix exported definitions when building DLL with STL
[#2387](https://github.com/open-telemetry/opentelemetry-cpp/pull/2387)
* [BUILD] Add missing includes to runtime_context_test
[#2395](https://github.com/open-telemetry/opentelemetry-cpp/pull/2395)
* [ADMIN] Add file .github/repository-settings.md
[#2392](https://github.com/open-telemetry/opentelemetry-cpp/pull/2392)
* [SDK] Fix GetLogger with empty library name
[#2398](https://github.com/open-telemetry/opentelemetry-cpp/pull/2398)
* [TEST] Fix compiling problem and removed -DENABLE_TEST
[#2401](https://github.com/open-telemetry/opentelemetry-cpp/pull/2401)
* [BUILD] Check windows options are not passed to non-Windows build
[#2399](https://github.com/open-telemetry/opentelemetry-cpp/pull/2399)
* [EXPORTER] Rework OTLP/HTTP and OTLP/GRPC exporter options
[#2388](https://github.com/open-telemetry/opentelemetry-cpp/pull/2388)
* [Build] Update vcpkg to latest release
[#2412](https://github.com/open-telemetry/opentelemetry-cpp/pull/2412)
* [SDK] Cardinality limits for metrics streams
(Sync Instruments + Delta Temporality)
[#2255](https://github.com/open-telemetry/opentelemetry-cpp/pull/2255)
* [EXPORTER] Prometheus: Add unit to names, convert to word
[#2213](https://github.com/open-telemetry/opentelemetry-cpp/pull/2213)
* [Metrics] Make context optional for histogram instruments in Metrics SDK
[#2416](https://github.com/open-telemetry/opentelemetry-cpp/pull/2416)
* [BUILD] Fix references to trace namespace to be fully qualified
[#2422](https://github.com/open-telemetry/opentelemetry-cpp/pull/2422)
* [BUILD] Bump third_party/googletest to same version as bazel
[#2421](https://github.com/open-telemetry/opentelemetry-cpp/pull/2421)
* [BUILD] Remove defining NOMINMAX from api
[#2420](https://github.com/open-telemetry/opentelemetry-cpp/pull/2420)
* [BUILD] 'uint8_t' not declared in this scope with gcc 13.2.1
[#2423](https://github.com/open-telemetry/opentelemetry-cpp/pull/2423)
* [BUILD] Improve the handling of OPENTELEMETRY_HAVE_WORKING_REGEX
[#2430](https://github.com/open-telemetry/opentelemetry-cpp/pull/2430)
* [SEMANTIC CONVENTION] Upgrade to semconv 1.23.1
[#2428](https://github.com/open-telemetry/opentelemetry-cpp/pull/2428)
* [BUILD] Use fully qualified references to trace/common namespace
[#2424](https://github.com/open-telemetry/opentelemetry-cpp/pull/2424)
* [API] Create root span with active span
[#2427](https://github.com/open-telemetry/opentelemetry-cpp/pull/2427)
* [REMOVAL] Remove ZPAGES
[#2433](https://github.com/open-telemetry/opentelemetry-cpp/pull/2433)
Important changes:
* [API] Add InstrumentationScope attributes in TracerProvider::GetTracer()
[#2371](https://github.com/open-telemetry/opentelemetry-cpp/pull/2371)
* TracerProvider::GetTracer() now accepts InstrumentationScope attributes.
* Because this is an `ABI` breaking change, the fix is only available
with the `CMake` option `WITH_ABI_VERSION_2=ON`.
* When building with `CMake` option `WITH_ABI_VERSION_1=ON` (by default)
the `ABI` is unchanged, and the fix is not available.
* [API] Add a new AddLink() operation to Span
[#2380](https://github.com/open-telemetry/opentelemetry-cpp/pull/2380)
* New `API` Span::AddLink() adds a single link to a span.
* New `API` Span::AddLinks() adds multiple links to a span.
* Because this is an `ABI` breaking change, the fix is only available
with the `CMake` option `WITH_ABI_VERSION_2=ON`.
* When building with `CMake` option `WITH_ABI_VERSION_1=ON` (by default)
the `ABI` is unchanged, and the fix is not available.
* [BUILD] Make WITH_OTLP_HTTP_SSL_PREVIEW mainstream
[#2378](https://github.com/open-telemetry/opentelemetry-cpp/pull/2378)
* The experimental `CMake` option `WITH_OTLP_HTTP_SSL_PREVIEW`
is now promoted to stable. The default is changed to `ON`.
* The experimental `CMake` option `WITH_OTLP_HTTP_SSL_TLS_PREVIEW`
is now promoted to stable. The default is changed to `ON`.
* These build options are scheduled to be removed by the next release,
building without SSL/TLS will no longer be possible.
* [EXPORTER] Rework OTLP/HTTP and OTLP/GRPC exporter options
[#2388](https://github.com/open-telemetry/opentelemetry-cpp/pull/2388)
* `OtlpGrpcMetricExporterOptions` used to honor `_TRACES_`
environment variables, instead of `_METRICS_` environment variables.
* The implementation of `OtlpGrpcMetricExporterOptions` is now fixed.
* Please check configuration variables,
to make sure `_METRICS_` variables are set as expected.
Breaking changes:
* [BUILD] Remove WITH_REMOVE_METER_PREVIEW, use WITH_ABI_VERSION_2 instead
[#2370](https://github.com/open-telemetry/opentelemetry-cpp/pull/2370)
* The experimental `CMake` option `WITH_REMOVE_METER_PREVIEW` is removed,
use option `WITH_ABI_VERSION_2` instead.
* [BUILD] enum CanonicalCode names too generic... conflict with old C defines
[#2385](https://github.com/open-telemetry/opentelemetry-cpp/pull/2385)
* Header file `opentelemetry/trace/canonical_code.h` is unused,
and is now removed.
* This header should not be included directly in an application.
If this is the case, please remove any remaining include directives.
* [BUILD] Fix exported definitions when building DLL with STL
[#2387](https://github.com/open-telemetry/opentelemetry-cpp/pull/2387)
* The MeterSelector, MeterSelectorFactory, InstrumentSelector,
and InstrumentSelectorFactory APIs now use const std::string&
instead of nostd::string_view for name, version and schema to
maintain a single export definition for DLL.
* [EXPORTER] Rework OTLP/HTTP and OTLP/GRPC exporter options
[#2388](https://github.com/open-telemetry/opentelemetry-cpp/pull/2388)
* `OtlpGrpcLogRecordExporter` incorrectly used `OtlpGrpcExporterOptions`,
which are options for traces and not logs.
* This created a bug: the `OtlpGrpcLogRecordExporter` honors `_TRACES_`
environment variables, instead of `_LOGS_` environment variables.
* `OtlpGrpcLogRecordExporter` is changed to use
`OtlpGrpcLogRecordExporterOptions` instead, fixing the bug.
* User code that initializes the SDK with a GRPC Log exporter,
and uses exporter options, should adjust to replace
`OtlpGrpcExporterOptions` with `OtlpGrpcLogRecordExporterOptions`.
* Please check configuration variables,
to make sure `_LOGS_` variables are set as expected.
* [REMOVAL] Remove ZPAGES
[#2433](https://github.com/open-telemetry/opentelemetry-cpp/pull/2433)
* As announced in release 1.12.0,
the deprecated ZPAGES exporter is now removed.
## [1.12.0] 2023-10-16
* [BUILD] Support `pkg-config`
[#2269](https://github.com/open-telemetry/opentelemetry-cpp/pull/2269)
* [CI] Do not automatically close stale issues
[#2277](https://github.com/open-telemetry/opentelemetry-cpp/pull/2277)
* [CI] Benchmark workflow fails, C++14 required to build grpc
[#2278](https://github.com/open-telemetry/opentelemetry-cpp/pull/2278)
* [SDK] Increase metric name maximum length from 63 to 255 characters
[#2284](https://github.com/open-telemetry/opentelemetry-cpp/pull/2284)
* [SEMANTIC CONVENTION] Deprecated semconv (in the spec)
not deprecated (in C++)
[#2285](https://github.com/open-telemetry/opentelemetry-cpp/pull/2285)
* [SDK] Remove unused member variables from SyncMetricStorage
[#2294](https://github.com/open-telemetry/opentelemetry-cpp/pull/2294)
* [DEPRECATION] Deprecate ZPAGES
[#2291](https://github.com/open-telemetry/opentelemetry-cpp/pull/2291)
* [API] Deliver ABI breaking changes
[#2222](https://github.com/open-telemetry/opentelemetry-cpp/pull/2222)
* [SDK] Allow metric instrument names to contain / characters
[#2310](https://github.com/open-telemetry/opentelemetry-cpp/pull/2310)
* [SDK] Fix Observable Counters/UpDownCounters
[#2298](https://github.com/open-telemetry/opentelemetry-cpp/pull/2298)
* [SDK] Add exemplar reservoir to async metric storage
[#2319](https://github.com/open-telemetry/opentelemetry-cpp/pull/2319)
* [TEST] Fix lifetime issues in prometheus test utils
[#2322](https://github.com/open-telemetry/opentelemetry-cpp/pull/2322)
* [EXPORTER] Prometheus: Remove explicit timestamps from metric points
[#2324](https://github.com/open-telemetry/opentelemetry-cpp/pull/2324)
* [EXPORTER] Prometheus: Handle attribute key collisions from sanitation
[#2326](https://github.com/open-telemetry/opentelemetry-cpp/pull/2326)
* [EXPORTER] Prometheus cleanup, test with TranslateToPrometheus
[#2329](https://github.com/open-telemetry/opentelemetry-cpp/pull/2329)
* [SDK] Fix log message in Meter::RegisterSyncMetricStorage
[#2325](https://github.com/open-telemetry/opentelemetry-cpp/pull/2325)
* [DOC] Simplify the project status section
[#2332](https://github.com/open-telemetry/opentelemetry-cpp/pull/2332)
* [EXPORTER] Prometheus: Sanitize labels according to spec
[#2330](https://github.com/open-telemetry/opentelemetry-cpp/pull/2330)
* [SDK] Fix deadlock when shuting down http client
[#2337](https://github.com/open-telemetry/opentelemetry-cpp/pull/2337)
* [Exporter] Group spans by resource and instrumentation scope
in OTLP export requests
[#2335](https://github.com/open-telemetry/opentelemetry-cpp/pull/2335)
* [BUILD] Need fine-grained HAVE_CPP_STDLIB
[#2304](https://github.com/open-telemetry/opentelemetry-cpp/pull/2304)
* [API] Add InstrumentationScope attributes in MeterProvider::GetMeter()
[#2224](https://github.com/open-telemetry/opentelemetry-cpp/pull/2224)
* [REMOVAL] Drop C++11 support
[#2342](https://github.com/open-telemetry/opentelemetry-cpp/pull/2342)
* [EXPORTER] prometheus: add otel_scope_name and otel_scope_version labels
[#2293](https://github.com/open-telemetry/opentelemetry-cpp/pull/2293)
* [EXPORTER] Export resource for prometheus
[#2301](https://github.com/open-telemetry/opentelemetry-cpp/pull/2301)
* [BUILD] error: read-only reference ‘value’ used as ‘asm’ output
[#2354](https://github.com/open-telemetry/opentelemetry-cpp/pull/2354)
* [BUILD] Build break with external CMake nlohman_json package
[#2353](https://github.com/open-telemetry/opentelemetry-cpp/pull/2353)
* [BUILD] Upgrade libcurl to version 8.4.0
[#2358](https://github.com/open-telemetry/opentelemetry-cpp/pull/2358)
* [BUILD] Fix opentracing-shim when added in super project
[#2356](https://github.com/open-telemetry/opentelemetry-cpp/pull/2356)
* [BUILD] Fix protoc searching with non-imported protobuf::protoc target
[#2362](https://github.com/open-telemetry/opentelemetry-cpp/pull/2362)
* [BUILD] Support to use different cmake package CONFIG of dependencies
[#2263](https://github.com/open-telemetry/opentelemetry-cpp/pull/2263)
* [SEMANTIC CONVENTION] Upgrade to semconv 1.22.0
[#2368](https://github.com/open-telemetry/opentelemetry-cpp/pull/2368)
Important changes:
* [API] Add InstrumentationScope attributes in MeterProvider::GetMeter()
[#2224](https://github.com/open-telemetry/opentelemetry-cpp/pull/2224)
* MeterProvider::GetMeter() now accepts InstrumentationScope attributes.
* Because this is an `ABI` breaking change, the fix is only available
with the `CMake` option `WITH_ABI_VERSION_2=ON`.
* When building with `CMake` option `WITH_ABI_VERSION_1=ON` (by default)
the `ABI` is unchanged, and the fix is not available.
Breaking changes:
* [BUILD] Need fine-grained HAVE_CPP_STDLIB
[#2304](https://github.com/open-telemetry/opentelemetry-cpp/pull/2304)
* In `CMAKE`, the boolean option `WITH_STL` as changed to an option
that accepts the values `OFF`, `ON`, `CXX11`, `CXX14`, `CXX17`,
`CXX20` and `CXX23`.
* Applications makefiles that did not set WITH_STL need to use
`WITH_STL=OFF` instead (this is the default).
* Applications makefiles that did set WITH_STL need to use
`WITH_STL=ON` instead, or may choose to pick a specific value.
* In the `API` header files, the preprocessor symbol `HAVE_CPP_STDLIB`
is no longer used.
* Applications that did set `HAVE_CPP_STDLIB` before, need to set
`OPENTELEMETRY_STL_VERSION=<version>` instead, to build with a
specific STL version (2011, 2014, 2017, 2020, 2023).
* The opentelemetry-cpp makefile no longer sets
CMAKE_CXX_STANDARD by itself.
Instead, the CMAKE_CXX_STANDARD and/or compiler options -stdc++ used
by the caller are honored.
* Applications that set neither CMAKE_CXX_STANDARD nor -stdc++
options may need to provide a C++ standard in their makefiles.
* [REMOVAL] Drop C++11 support
[#2342](https://github.com/open-telemetry/opentelemetry-cpp/pull/2342)
* Building with C++11 is no longer supported.
Deprecations:
* [DEPRECATION] Deprecate ZPAGES
[#2291](https://github.com/open-telemetry/opentelemetry-cpp/pull/2291)
## [1.11.0] 2023-08-21
* [BUILD] Fix more cases for symbol name for 32-bit win32 DLL build
[#2264](https://github.com/open-telemetry/opentelemetry-cpp/pull/2264)
* [BUILD] added public link of `opentelemetry_proto_grpc` against gRPC lib (only
if gRPC library is shared)
[#2268](https://github.com/open-telemetry/opentelemetry-cpp/pull/2268)
* [CI] use ubuntu-latest for tsan CI
[#2267](https://github.com/open-telemetry/opentelemetry-cpp/pull/2267)
* [SDK] Fixing an apparent logging macro bug
[#2265](https://github.com/open-telemetry/opentelemetry-cpp/pull/2265)
* [BUILD] Support protobuf 3.22 or upper
[#2163](https://github.com/open-telemetry/opentelemetry-cpp/pull/2163)
* [BUILD] Remove extra includes
[#2252](https://github.com/open-telemetry/opentelemetry-cpp/pull/2252)
* [LOGS API SDK] Mark logs signal as stable API/SDK
[#2229](https://github.com/open-telemetry/opentelemetry-cpp/pull/2229)
* [SEMANTIC CONVENTIONS] Upgrade to 1.21.0
[#2248](https://github.com/open-telemetry/opentelemetry-cpp/pull/2248)
* [SDK] Valgrind errors on std::atomic variables
[#2244](https://github.com/open-telemetry/opentelemetry-cpp/pull/2244)
* [BUILD] Fix compile with clang 16 and libc++
[#2242](https://github.com/open-telemetry/opentelemetry-cpp/pull/2242)
* [Metrics SDK] Add unit to Instrument selection criteria
[#2236](https://github.com/open-telemetry/opentelemetry-cpp/pull/2236)
* [SDK] Add OStreamLogRecordExporterFactory
[#2240](https://github.com/open-telemetry/opentelemetry-cpp/pull/2240)
* [SDK] Add support for LowMemory metrics temporality
[#2234](https://github.com/open-telemetry/opentelemetry-cpp/pull/2234)
* [CI] Misc build scripts cleanup
[#2232](https://github.com/open-telemetry/opentelemetry-cpp/pull/2232)
* [CI] Upgrade GoogleTest version from 1.12.1 to 1.13.0
[#2114](https://github.com/open-telemetry/opentelemetry-cpp/pull/2114)
* [BUILD] include cstdint
[#2230](https://github.com/open-telemetry/opentelemetry-cpp/pull/2230)
* [EXPORTER] Support protobuf 3.22 or upper
[#2163](https://github.com/open-telemetry/opentelemetry-cpp/pull/2163)
* [SDK] Mark logs signal as stable API/SDK
[#2229](https://github.com/open-telemetry/opentelemetry-cpp/pull/2229)
Breaking changes:
* [SDK] Add unit to Instrument selection criteria
[#2236](https://github.com/open-telemetry/opentelemetry-cpp/pull/2236)
* The `View` constructor and `ViewFactory::Create` method now takes a
`unit` criteria as optional third argument.
* Please adjust SDK configuration code accordingly.
## [1.10.0] 2023-07-11
* [REMOVAL] Remove the jaeger exporter
[#2031](https://github.com/open-telemetry/opentelemetry-cpp/pull/2031)
* [CI] Add a C++11 build
[#2152](https://github.com/open-telemetry/opentelemetry-cpp/pull/2152)
* [CI] Add Include what you use
[#2214](https://github.com/open-telemetry/opentelemetry-cpp/pull/2214)
* [CI] opentelemetry-cpp project CI
[#2071](https://github.com/open-telemetry/opentelemetry-cpp/pull/2071)
* [CI] Do not tag pull_request with the "need-triage" label
[#2228](https://github.com/open-telemetry/opentelemetry-cpp/pull/2228)
* [BUILD] Fixing CMake to build GTest on Windows
[#1887](https://github.com/open-telemetry/opentelemetry-cpp/pull/1887)
* [BUILD] Remove option WITH_OTLP
[#2161](https://github.com/open-telemetry/opentelemetry-cpp/pull/2161)
* [BUILD] Link to opentelemetry_logs even without OTLP
[#2177](https://github.com/open-telemetry/opentelemetry-cpp/pull/2177)
* [BUILD] Avoid dependency on protobuf from the OTLP HTTP metrics exporter header
[#2179](https://github.com/open-telemetry/opentelemetry-cpp/pull/2179)
* [BUILD] Add ctime header to metrics_exporter.cc
[#2187](https://github.com/open-telemetry/opentelemetry-cpp/pull/2187)
* [BUILD] Fix the exported symbol name for 32-bit win32 DLL
[#2190](https://github.com/open-telemetry/opentelemetry-cpp/pull/2190)
* [BUILD] Upgrade to opentelemetry-proto 0.20.0
[#2195](https://github.com/open-telemetry/opentelemetry-cpp/pull/2195)
* [BUILD] SDK Header files cleanup, use forward declarations
[#2182](https://github.com/open-telemetry/opentelemetry-cpp/pull/2182)
* [BUILD] Enable building otel-cpp extensions from main repo
[#1937](https://github.com/open-telemetry/opentelemetry-cpp/pull/1937)
* [BUILD] Fix if check on environment variable and add CMake variable
[#2207](https://github.com/open-telemetry/opentelemetry-cpp/pull/2207)
* [BUILD] Add `OPENTELEMETRY_CPP_FOUND` into cmake CONFIG file
[#2215](https://github.com/open-telemetry/opentelemetry-cpp/pull/2215)
* [BUILD] Upgrade opentelemetry-proto to 1.0.0
[#2216](https://github.com/open-telemetry/opentelemetry-cpp/pull/2216)
* [BUILD] Include nostd/string_view which is used in severity.h
[#2219](https://github.com/open-telemetry/opentelemetry-cpp/pull/2219)
* [TEST] Expand api singleton test to cover explicit dlopen()
[#2164](https://github.com/open-telemetry/opentelemetry-cpp/pull/2164)
* [API] Remove include_trace_context
[#2194](https://github.com/open-telemetry/opentelemetry-cpp/pull/2194)
* [API] Remove Meters
[#2205](https://github.com/open-telemetry/opentelemetry-cpp/pull/2205)
* [SDK] Add AdaptingCircularBufferCounter for exponential histograms
[#2158](https://github.com/open-telemetry/opentelemetry-cpp/pull/2158)
* [SDK] Add base2 exponential histogram indexer
[#2173](https://github.com/open-telemetry/opentelemetry-cpp/pull/2173)
* [SDK] Simplify SDK version
[#2180](https://github.com/open-telemetry/opentelemetry-cpp/pull/2180)
* [SDK] Add benchmark for base2 exponential histogram indexer
[#2181](https://github.com/open-telemetry/opentelemetry-cpp/pull/2181)
* [SDK] Provide builders to avoid exposing Metrics SDK internals
[#2189](https://github.com/open-telemetry/opentelemetry-cpp/pull/2189)
* [SDK] MeterProvider should own MeterContext, not share it
[#2218](https://github.com/open-telemetry/opentelemetry-cpp/pull/2218)
* [SDK] TracerProvider should own TracerContext, not share it
[#2221](https://github.com/open-telemetry/opentelemetry-cpp/pull/2221)
* [EXPORTER] Change OTLP Json field name to camelCase
[#2162](https://github.com/open-telemetry/opentelemetry-cpp/pull/2162)
* [EXPORTER] Support empty arrays in `OtlpRecordable` attributes
[#2166](https://github.com/open-telemetry/opentelemetry-cpp/pull/2166)
* [EXPORTER] set is_monotonic only for instrument type kCounter
[#2171](https://github.com/open-telemetry/opentelemetry-cpp/pull/2171)
* [EXPORTER] Fixed HTTP CURL for 32bits platforms
[#2178](https://github.com/open-telemetry/opentelemetry-cpp/pull/2178)
* [EXPORTER] Fix OTLP HTTP exporting in sync mode
[#2193](https://github.com/open-telemetry/opentelemetry-cpp/pull/2193)
* [EXPORTER] Prometheus exporter sanitizes invalid characters
[#1934](https://github.com/open-telemetry/opentelemetry-cpp/pull/1934)
* [EXPORTER] Prometheus: Error on ingesting samples
with different value but same timestamp
[#2200](https://github.com/open-telemetry/opentelemetry-cpp/pull/2200)
* [EXPORTER] OTLP GRPC mTLS support
[#2120](https://github.com/open-telemetry/opentelemetry-cpp/pull/2120)
* [DOC] Small fix for Histogram documentation
[#2156](https://github.com/open-telemetry/opentelemetry-cpp/pull/2156)
* [DOC] Move Reiley Yang to emeritus
[#2198](https://github.com/open-telemetry/opentelemetry-cpp/pull/2198)
Important changes:
* [API] Remove Meters
[#2205](https://github.com/open-telemetry/opentelemetry-cpp/pull/2205)
* The CMake option `WITH_REMOVE_METER_PREVIEW` was added.
* This option is experimental, and may change in the future.
* Enabling it is an ABI breaking change.
Breaking changes:
* [REMOVAL] Remove the jaeger exporter
[#2031](https://github.com/open-telemetry/opentelemetry-cpp/pull/2031)
* The CMake `WITH_JAEGER` option has been removed
* Please remove usage of `WITH_JAEGER` from user scripts and makefiles.
* [SDK] MeterProvider should own MeterContext, not share it
[#2218](https://github.com/open-telemetry/opentelemetry-cpp/pull/2218)
* The `MeterProvider` constructor now takes a `unique_ptr` on
`MeterContext`, instead of a `shared_ptr`.
* Please adjust SDK configuration code accordingly.
* [SDK] TracerProvider should own TracerContext, not share it
[#2221](https://github.com/open-telemetry/opentelemetry-cpp/pull/2221)
* The `TracerProvider` constructor now takes a `unique_ptr` on
`TracerContext`, instead of a `shared_ptr`.
* The `LoggerProvider` constructor now takes a `unique_ptr` on
`LoggerContext`, instead of a `shared_ptr`.
* Please adjust SDK configuration code accordingly.
## [1.9.1] 2023-05-26
* [DEPRECATION] Drop C++11 support
[#2146](https://github.com/open-telemetry/opentelemetry-cpp/pull/2146)
* [CI] Upgrade Bazel and Bazelisk version
[#2118](https://github.com/open-telemetry/opentelemetry-cpp/pull/2118)
* [CI] Upgrade Google Benchmark version from 1.6.0 to 1.7.1
[#2116](https://github.com/open-telemetry/opentelemetry-cpp/pull/2116)
* [CI] Upgrade Nlohmann JSON library version from 3.10.5 to 3.11.2
[#2115](https://github.com/open-telemetry/opentelemetry-cpp/pull/2115)
* [BUILD] Missed include
[#2143](https://github.com/open-telemetry/opentelemetry-cpp/pull/2143)
* [BUILD] Add opentelemetry_proto_grpc and allow build shared
opentelemetry_proto and opentelemetry_proto_grpc on non-Windows platform.
[#2097](https://github.com/open-telemetry/opentelemetry-cpp/pull/2097)
* [BUILD] Warning cleanup, single character wrapped by std::string
[#2137](https://github.com/open-telemetry/opentelemetry-cpp/pull/2137)
* [BUILD] Add missing target dependencies
[#2128](https://github.com/open-telemetry/opentelemetry-cpp/pull/2128)
* [BUILD] Fix if JSON library already added another CMake target
[#2126](https://github.com/open-telemetry/opentelemetry-cpp/pull/2126)
* [BUILD] shared libraries with version suffix, along with the symbolic link
[#2109](https://github.com/open-telemetry/opentelemetry-cpp/pull/2109)
* [BUILD] Show warning message if WITH_OTLP is enabled
[#2112](https://github.com/open-telemetry/opentelemetry-cpp/pull/2112)
* [BUILD] Add missing STL header.
[#2107](https://github.com/open-telemetry/opentelemetry-cpp/pull/2107)
* [BUILD] Build break with old curl, macro CURL_VERSION_BITS unknown
[#2102](https://github.com/open-telemetry/opentelemetry-cpp/pull/2102)
* [BUILD] Transitive dependency issue with the otlp http exporter
[#2154](https://github.com/open-telemetry/opentelemetry-cpp/pull/2154)
* [TEST] Add unit test for log body implicit conversions.
[#2136](https://github.com/open-telemetry/opentelemetry-cpp/pull/2136)
* [TEST] Add event id to logger benchmark method
[#2133](https://github.com/open-telemetry/opentelemetry-cpp/pull/2133)
* [API] Fix inclusion header files and use forward declaration
[#2124](https://github.com/open-telemetry/opentelemetry-cpp/pull/2124)
* [API] Add user facing Logging API and Benchmarks
[#2094](https://github.com/open-telemetry/opentelemetry-cpp/pull/2094)
* [SDK] SDK support for the new OTel log
[#2123](https://github.com/open-telemetry/opentelemetry-cpp/pull/2123)
* [EXPORTER] Fixed HTTP session cleanup on shutdown
[#2111](https://github.com/open-telemetry/opentelemetry-cpp/pull/2111)
* [EXPORTER] Delegate all API calls of gRPC into
opentelemetry_exporter_otlp_grpc_client,
and make it contains all symbols needed.
[#2005](https://github.com/open-telemetry/opentelemetry-cpp/pull/2005)
* [DOC] Add Marc as maintainer.
[#2027](https://github.com/open-telemetry/opentelemetry-cpp/pull/2027)
Breaking changes:
* Add opentelemetry_proto_grpc and move gRPC sources into it.
[#2097](https://github.com/open-telemetry/opentelemetry-cpp/pull/2097)
* There will be no breaking changes for users who only use OTLP exporters and
do not directly use opentelemetry-cpp::proto. However, it is important to
note that `opentelemetry-cpp::proto` no longer contains generated gRPC codes
, and all components that depend on these gRPC codes should also link to
`opentelemetry-cpp::proto_grpc`.
Deprecations:
* The Jaeger Exporter is deprecated, see [DEPRECATED](./DEPRECATED.md) for details.
* C++11 support is to end, C++14 will be supported instead,
see [DEPRECATED](./DEPRECATED.md) for details.
## [1.9.0] 2023-04-12
* [CI] Make build environment parallel (Windows)
[#2080](https://github.com/open-telemetry/opentelemetry-cpp/pull/2080)
* [CI] Make build environment parallel (Linux)
[#2076](https://github.com/open-telemetry/opentelemetry-cpp/pull/2076)
* [CI] Remove separate run of metrics ostream example
[#2030](https://github.com/open-telemetry/opentelemetry-cpp/pull/2030)
* [BUILD] Include directory path added for Zipkin exporter example
[#2069](https://github.com/open-telemetry/opentelemetry-cpp/pull/2069)
* [BUILD] Ignore more warning in generated protobuf files
[#2067](https://github.com/open-telemetry/opentelemetry-cpp/pull/2067)
* [BUILD] Clean warnings in ETW exporters
[#2063](https://github.com/open-telemetry/opentelemetry-cpp/pull/2063)
* [BUILD] Fix default value of OPENTELEMETRY_INSTALL_default
[#2062](https://github.com/open-telemetry/opentelemetry-cpp/pull/2062)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.20.0
[#2088](https://github.com/open-telemetry/opentelemetry-cpp/pull/2088)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.19.0
[#2017](https://github.com/open-telemetry/opentelemetry-cpp/pull/2017)
* [API] Checking indices before dereference in string utils
[#2040](https://github.com/open-telemetry/opentelemetry-cpp/pull/2040)
* [API] Export factory class of log provider
[#2041](https://github.com/open-telemetry/opentelemetry-cpp/pull/2041)
* [SDK] Implement Forceflush for Periodic Metric Reader
[#2064](https://github.com/open-telemetry/opentelemetry-cpp/pull/2064)
* [SDK] Add `ForceFlush` for all `LogRecordExporter` and `SpanExporter`
[#2000](https://github.com/open-telemetry/opentelemetry-cpp/pull/2000)
* [SDK] Fix schema URL precedence bug in `Resource::Merge`
[#2036](https://github.com/open-telemetry/opentelemetry-cpp/pull/2036)
* [SDK] Use sdk_start_ts for MetricData start_ts for instruments having
cumulative aggregation temporality.
[#2086](https://github.com/open-telemetry/opentelemetry-cpp/pull/2086)
* [EXPORTER] Add OTLP HTTP SSL support
[#1793](https://github.com/open-telemetry/opentelemetry-cpp/pull/1793)
* [EXPORTER] GRPC endpoint scheme should take precedence over OTEL_EXPORTER_OTLP_TRACES_INSECURE
[#2060](https://github.com/open-telemetry/opentelemetry-cpp/pull/2060)
* [EXAMPLES] Remove unused 'alerting' section from prometheus.yml in examples
[#2055](https://github.com/open-telemetry/opentelemetry-cpp/pull/2055)
* [EXAMPLES] Fix view names in Prometheus example
[#2034](https://github.com/open-telemetry/opentelemetry-cpp/pull/2034)
* [DOC] Fix some docs typo
[#2057](https://github.com/open-telemetry/opentelemetry-cpp/pull/2057)
* [DOC] Update OpenTracing shim README.md
[#2028](https://github.com/open-telemetry/opentelemetry-cpp/pull/2028)
* [DOC] INSTALL doc clarifications
[#2078](https://github.com/open-telemetry/opentelemetry-cpp/pull/2078)
Important changes:
* [EXPORTER] GRPC endpoint scheme should take precedence over OTEL_EXPORTER_OTLP_TRACES_INSECURE
[#2060](https://github.com/open-telemetry/opentelemetry-cpp/pull/2060)
* The logic to decide whether or not an OTLP GRPC exporter uses SSL has
changed to comply with the specification:
* Before this change, the following settings were evaluated, in order:
* OTEL_EXPORTER_OTLP_TRACES_INSECURE (starting with 1.8.3)
* OTEL_EXPORTER_OTLP_INSECURE (starting with 1.8.3)
* OTEL_EXPORTER_OTLP_TRACES_SSL_ENABLE
* OTEL_EXPORTER_OTLP_SSL_ENABLE
* With this change, the following settings are evaluated, in order:
* The GRPC endpoint scheme, if provided:
* "https" imply with SSL,
* "http" imply without ssl.
* OTEL_EXPORTER_OTLP_TRACES_INSECURE
* OTEL_EXPORTER_OTLP_INSECURE
* OTEL_EXPORTER_OTLP_TRACES_SSL_ENABLE
* OTEL_EXPORTER_OTLP_SSL_ENABLE
* As a result, a behavior change for GRPC SSL is possible,
because the endpoint scheme now takes precedence.
Please verify configuration settings for the GRPC endpoint.
* [SDK] Add `ForceFlush` for all `LogRecordExporter` and `SpanExporter`
[#2000](https://github.com/open-telemetry/opentelemetry-cpp/pull/2000)
* `LogRecordExporter` and `SpanExporter` add a new virtual function
`ForceFlush`, and if users implement any customized `LogRecordExporter` and
`SpanExporter`, they should also implement this function.
There should be no impact if users only use factory to create exporters.
Deprecations:
* The Jaeger Exporter is deprecated, see [DEPRECATED](./DEPRECATED.md) for details.
## [1.8.3] 2023-03-06
* Provide version major/minor/patch macros
[#2014](https://github.com/open-telemetry/opentelemetry-cpp/pull/2014)
* [BUILD] Add `OPENTELEMETRY_INSTALL` to allow user to skip install targets.
[#2022](https://github.com/open-telemetry/opentelemetry-cpp/pull/2022)
* [SDK] Rename the global SDK version variables to avoid naming clash
[#2011](https://github.com/open-telemetry/opentelemetry-cpp/pull/2011)
* [BUILD] Fix typo in CMakeLists.txt
[#2010](https://github.com/open-telemetry/opentelemetry-cpp/pull/2010)
* [EXPORTER] fix Prometheus test iterator iterator increment
[#2006](https://github.com/open-telemetry/opentelemetry-cpp/pull/2006)
* [SDK]Add attributes for InstrumentationScope
[#2004](https://github.com/open-telemetry/opentelemetry-cpp/pull/2004)
* [METRICS SDK] Performance improvement in measurement processing
[#1993](https://github.com/open-telemetry/opentelemetry-cpp/pull/1993)
* [EXAMPLE] Add example for logs ostream exporter
[#1992](https://github.com/open-telemetry/opentelemetry-cpp/pull/1992)
* [ETW Exporter] Support serialize span/log attributes into JSON
[#1991](https://github.com/open-telemetry/opentelemetry-cpp/pull/1991)
* [ETW Exporter]Do not overwrite ParentId when setting attribute on Span
[#1989](https://github.com/open-telemetry/opentelemetry-cpp/pull/1989)
* Upgrade prometheus-cpp to v1.1.0
[#1954](https://github.com/open-telemetry/opentelemetry-cpp/pull/1954)
* Convert Prometheus Exporter to Pull MetricReader
[#1953](https://github.com/open-telemetry/opentelemetry-cpp/pull/1953)
* [DOCS] Add alpine packages to INSTALL.md
[#1957](https://github.com/open-telemetry/opentelemetry-cpp/pull/1957)
* [METRICS SDK] Add benchmark tests for Sum Aggregation.
[#1948](https://github.com/open-telemetry/opentelemetry-cpp/pull/1948)
* [BUILD] Build OpenTelemetry SDK and exporters into DLL
[#1932](https://github.com/open-telemetry/opentelemetry-cpp/pull/1932)
* [CI] Enforce copyright check in CI
[#1965](https://github.com/open-telemetry/opentelemetry-cpp/pull/1965)
* [BUILD] Fix typo GENENV -> GETENV
[#1972](https://github.com/open-telemetry/opentelemetry-cpp/pull/1972)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.18.0
[#1974](https://github.com/open-telemetry/opentelemetry-cpp/pull/1974)
* [EXT] Fix thread-safety when shutdown.
[#1977](https://github.com/open-telemetry/opentelemetry-cpp/pull/1977)
* [SDK] Fix missing ObservedTimestamp.
[#1985](https://github.com/open-telemetry/opentelemetry-cpp/pull/1985)
* [METRICS SDK] fix variable names
[#1987](https://github.com/open-telemetry/opentelemetry-cpp/pull/1987)
* [EXPORTER] Fix Prometheus server crash on listening to already used port
[#1986](https://github.com/open-telemetry/opentelemetry-cpp/pull/1986)
* [EXPORTER] Boolean environment variables not parsed per the spec
[#1982](https://github.com/open-telemetry/opentelemetry-cpp/pull/1982)
* [EXPORTER] Opentracing shim
[#1909](https://github.com/open-telemetry/opentelemetry-cpp/pull/1909)
## [1.8.2] 2023-01-31
* Remove redundant macro check in nostd::shared_ptr [#1939](https://github.com/open-telemetry/opentelemetry-cpp/pull/1939)
* Fix typo in packages.cmake causing incorrect nuget package versions [#1936](https://github.com/open-telemetry/opentelemetry-cpp/pull/1936)
* [METRICS] Custom Aggregation support [#1899](https://github.com/open-telemetry/opentelemetry-cpp/pull/1899)
* Small fix in INSTALL.md for enabling building package. [#1930](https://github.com/open-telemetry/opentelemetry-cpp/pull/1930)
* [METRICS] Fix warning for misconfiguration of PeriodicExportingMetricReader [#1929](https://github.com/open-telemetry/opentelemetry-cpp/pull/1929)
* Make macros.h available for all source files via version.h [#1918](https://github.com/open-telemetry/opentelemetry-cpp/pull/1918)
* [METRICS] Histogram Aggregation: Fix bucket detection logic,
performance improvements, and benchmark tests [#1869](https://github.com/open-telemetry/opentelemetry-cpp/pull/1869)
* Remove unused namespace alias for nostd [#1914](https://github.com/open-telemetry/opentelemetry-cpp/pull/1914)
* [METRICS] Update meter.h [#1907](https://github.com/open-telemetry/opentelemetry-cpp/pull/1907)
* sdk::resource::Resource::Merge should be const [#1905](https://github.com/open-telemetry/opentelemetry-cpp/pull/1905)
* [METRICS] Collect and Export metric data before
PeriodicMetricReader shutdown. [#1860](https://github.com/open-telemetry/opentelemetry-cpp/pull/1860)
* [ETW EXPORTER] Add Virtual destructor for TailSampler, Update Maintainer
mode warnings for MSVC [#1897](https://github.com/open-telemetry/opentelemetry-cpp/pull/1897)
* Fix #1867 Orderly shutdown in examples [#1868](https://github.com/open-telemetry/opentelemetry-cpp/pull/1868)
* [METRICS] minor metrics handling optimizations [#1890](https://github.com/open-telemetry/opentelemetry-cpp/pull/1890)
* fix SpinLockMutex for Intel Compiler [#1885](https://github.com/open-telemetry/opentelemetry-cpp/pull/1885)
* [LOGS] Change BatchLogRecordProcessorFactory::Create to static method [#1876](https://github.com/open-telemetry/opentelemetry-cpp/pull/1876)
* Enable generating deb, rpm, NuGet, tgz, zip package through cmake build [#1662](https://github.com/open-telemetry/opentelemetry-cpp/pull/1662)
* Updated clone command in INSTALL.md [#1818](https://github.com/open-telemetry/opentelemetry-cpp/pull/1818)
* Small cleanup to remove old metrics design docs [#1855](https://github.com/open-telemetry/opentelemetry-cpp/pull/1855)
* [BUILD] Fix build error with older version of VS2017 compiler. [1857](https://github.com/open-telemetry/opentelemetry-cpp/pull/1857)
* [EXPORTERS] Enable setting Span endtime for ETW exporter [#1846](https://github.com/open-telemetry/opentelemetry-cpp/pull/1846)
* [REMOVAL] Remove deprecated experimental semantic conventions [#1743](https://github.com/open-telemetry/opentelemetry-cpp/pull/1743)
* [EXPORTERS] Fix console debug logs for otlp exporters. [#1848](https://github.com/open-telemetry/opentelemetry-cpp/pull/1848)
* [LOGS] Add `include_trace_context` and `EventLogger` [#1884](https://github.com/open-telemetry/opentelemetry-cpp/pull/1884)
* [METRICS] Change BatchLogRecordProcessorFactory::Create to static method
* [BUILD] Fix OTELCPP_MAINTAINER_MODE [#1844](https://github.com/open-telemetry/opentelemetry-cpp/pull/1844)
* [BUILD] Fix compatibility when using clang and libc++, upgrade GTest and
cmake when using C++20 [#1852](https://github.com/open-telemetry/opentelemetry-cpp/pull/1852)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.16.0
[#1854](https://github.com/open-telemetry/opentelemetry-cpp/pull/1854)
* [SDK] BatchSpanProcessor now logs a warning when dropping a span because the
queue is full
[1871](https://github.com/open-telemetry/opentelemetry-cpp/pull/1871)
* [BUILD] Migrate from @bazel_tools//platforms to [Bazel Platforms](https://github.com/bazelbuild/platforms)
to enable Bazel 6.0.0 compatibility [#1873](https://github.com/open-telemetry/opentelemetry-cpp/pull/1873)
* [BUILD] Cleanup CMake makefiles for nlohmann_json
[#1912](https://github.com/open-telemetry/opentelemetry-cpp/pull/1912)
* [BUILD] Cleanup CMake makefiles for CURL usage
[#1916](https://github.com/open-telemetry/opentelemetry-cpp/pull/1916)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.17.0
[#1927](https://github.com/open-telemetry/opentelemetry-cpp/pull/1927)
* [MAINTAINER DOC] Define and document a deprecation process,
[DEPRECATION] Deprecate the Jaeger exporter,
implemented by [#1923](https://github.com/open-telemetry/opentelemetry-cpp/pull/1923)
* [BUILD] OTLP HTTP Exporter has build warnings in maintainer mode
[#1943](https://github.com/open-telemetry/opentelemetry-cpp/pull/1943)
Deprecations:
* [MAINTAINER DOC] Define and document a deprecation process,
[#1923](https://github.com/open-telemetry/opentelemetry-cpp/pull/1923)
* A new file, [DEPRECATED](./DEPRECATED.md) list all the code currently
deprecated.
* A new [deprecation process](./docs/deprecation-process.md) details the plan to
deprecate and later remove code.
* [DEPRECATION] Deprecate the Jaeger exporter
[#1923](https://github.com/open-telemetry/opentelemetry-cpp/pull/1923)
* The Jaeger Exporter is deprecated, see [DEPRECATED](./DEPRECATED.md) for details.
Important changes:
* [BUILD] Cleanup CMake makefiles for CURL usage
[#1916](https://github.com/open-telemetry/opentelemetry-cpp/pull/1916)
* CMake option `WITH_OTLP_HTTP`
* Before this change, the CMake option `WITH_OTLP_HTTP` was unpredictable,
sometime set to ON and sometime set to OFF by default,
depending on whether a CURL package was found or not.
The option `WITH_OTLP_HTTP` was sometime not displayed in the ccmake
UI, making it impossible to even discover there is an option of that name.
* With this change, CMake option `WITH_OTLP_HTTP` is always OFF by
default. WITH_OTLP_HTTP MUST be set to ON explicitly to build the
OTLP HTTP exporter. The option is always visible in the ccmake UI.
* CMake option `BUILD_W3CTRACECONTEXT_TEST`
* Before this change, the W3C trace context tests were built, or
not, in an unpredictable way, depending on the presence, or not, of a
CURL package. In particular, the build could ignore the W3C trace
context tests even when BUILD_W3CTRACECONTEXT_TEST=ON.
* With this change, option BUILD_W3CTRACECONTEXT_TEST is honored.
* HTTP client/server examples
* Before this change, the HTTP client/server examples were built, or
not, in an unpredictable way, depending on the presence, or not, of a
CURL package.
* With this change, a new option `WITH_EXAMPLES_HTTP` is used to
build the HTTP client/server examples.
## [1.8.1] 2022-12-04
* [ETW Exporter] Tail based sampling support [#1780](https://github.com/open-telemetry/opentelemetry-cpp/pull/1780)
* [EXPORTERS] fix typo [affecting otlp exported histogram metrics max uint] [#1827](https://github.com/open-telemetry/opentelemetry-cpp/pull/1827)
* [EXPORTERS] fix enum-compare-switch warning [#1833](https://github.com/open-telemetry/opentelemetry-cpp/pull/1833)
* [METRICS] Change default temporality as "Cumulative" for OTLP metrics
exporters [#1828](https://github.com/open-telemetry/opentelemetry-cpp/pull/1828)
* [BUILD] Moved otlp_grpc_utils.cc to opentelemetry_exporter_otlp_grpc_client.
[#1829](https://github.com/open-telemetry/opentelemetry-cpp/pull/1829)
* Fix type mismatch when move nostd::shared_ptr [#1815](https://github.com/open-telemetry/opentelemetry-cpp/pull/1815)
* [BUILD] Fix Prometheus target name [#1820](https://github.com/open-telemetry/opentelemetry-cpp/pull/1820)
* Clean unused docker files [#1817](https://github.com/open-telemetry/opentelemetry-cpp/pull/1817)
* [BUILD] Fix default bazel build [#1816](https://github.com/open-telemetry/opentelemetry-cpp/pull/1816)
* [BUILD] move client::nosend under test_common [#1811](https://github.com/open-telemetry/opentelemetry-cpp/pull/1811)
* [BUILD] Fix opentelemetry-proto file exists check [#1824](https://github.com/open-telemetry/opentelemetry-cpp/pull/1824)
## [1.8.0] 2022-11-27
* [DOC] Update Metrics status in README.md [#1722](https://github.com/open-telemetry/opentelemetry-cpp/pull/1722)
* [DOC] Remove misleading comments about ABI compatibility for nostd::span [#1731](https://github.com/open-telemetry/opentelemetry-cpp/pull/1731)
* [BUILD] Bump abseil-cpp for cmake CI [#1807](https://github.com/open-telemetry/opentelemetry-cpp/pull/1807)
* [Exporter] Add status code to OTLP grpc trace log [#1792](https://github.com/open-telemetry/opentelemetry-cpp/pull/1792)
* [Exporter] add fix for prometheus exporter build [#1795](https://github.com/open-telemetry/opentelemetry-cpp/pull/1795)
* [BUILD] Add option WITH_BENCHMARK to disable building benchmarks [#1794](https://github.com/open-telemetry/opentelemetry-cpp/pull/1794)
* [BUILD] Fix CI benchmark [#1799](https://github.com/open-telemetry/opentelemetry-cpp/pull/1799)
* [BUILD] bump to gRPC v1.48.1 for bazel CIs [#1786](https://github.com/open-telemetry/opentelemetry-cpp/pull/1786)
* [BUILD] Fix CI build [#1798](https://github.com/open-telemetry/opentelemetry-cpp/pull/1798)
* [BUILD] Fix clang-format in CI [#1796](https://github.com/open-telemetry/opentelemetry-cpp/pull/1796)
* Fix session lock of OtlpHttpClient [#1760](https://github.com/open-telemetry/opentelemetry-cpp/pull/1760)
* [Metrics SDK] Add MeterContext::ForEachMeter() method to process callbacks on
Meter in thread-safe manner [#1783](https://github.com/open-telemetry/opentelemetry-cpp/pull/1783)
* [DOC] Document that clang-format version 10.0 is used. [#1782](https://github.com/open-telemetry/opentelemetry-cpp/pull/1782)
* [BUILD] Upgrade bazel build to use abseil-cpp-20220623.1 [#1779](https://github.com/open-telemetry/opentelemetry-cpp/pull/1779)
* Fix GlobalLogHandler singleton creation order [#1767](https://github.com/open-telemetry/opentelemetry-cpp/pull/1767)
* [Metrics SDK] Change Prometheus CMake target name [#1765](https://github.com/open-telemetry/opentelemetry-cpp/pull/1765)
* [DOC] Cleanup INSTALL.md [#1757](https://github.com/open-telemetry/opentelemetry-cpp/pull/1757)
* [DOC] Format config options in OTLP exporter readme [#1748](https://github.com/open-telemetry/opentelemetry-cpp/pull/1748)
* [DOC] Cleanup ENABLE_METRICS_PREVIEW [#1745](https://github.com/open-telemetry/opentelemetry-cpp/pull/1745)
* [Build] Multiple CURL packages leads to invalid build (#1738) [#1739](https://github.com/open-telemetry/opentelemetry-cpp/pull/1739)
* [Metrics SDK] Cleanup ENABLE_METRICS_PREVIEW [#1735](https://github.com/open-telemetry/opentelemetry-cpp/pull/1735)
* [Logs SDK] LogProcessor, LogExporter class name [#1736](https://github.com/open-telemetry/opentelemetry-cpp/pull/1736)
* [Metrics SDK] Cleanup of old _metric api/sdk [#1734](https://github.com/open-telemetry/opentelemetry-cpp/pull/1734)
* [ETW Exporter] Fix span timestamp(s) precision to nanoseconds [#1726](https://github.com/open-telemetry/opentelemetry-cpp/pull/1726)
* [LOGS SDK] Rename LogProcessor and LogExporter to LogRecordProcessor and LogRecordExporter
[#1727](https://github.com/open-telemetry/opentelemetry-cpp/pull/1727)
* [METRICS SDK] - Remove old metrics from Github CI
[#1733](https://github.com/open-telemetry/opentelemetry-cpp/pull/1733)
* [BUILD] Add CMake OTELCPP_PROTO_PATH [#1730](https://github.com/open-telemetry/opentelemetry-cpp/pull/1730)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.15.0
[#1761](https://github.com/open-telemetry/opentelemetry-cpp/pull/1761)
* [LOGS SDK] New LogRecord and logs::Recordable implementations.
[#1766](https://github.com/open-telemetry/opentelemetry-cpp/pull/1766)
Deprecation notes:
* [Deprecation] Deprecate experimental semantic conventions
[#1744](https://github.com/open-telemetry/opentelemetry-cpp/pull/1744)
* The file
`api/include/opentelemetry/trace/experimental_semantic_conventions.h`
is deprecated, and will be removed in a future release.
Use file
`api/include/opentelemetry/trace/semantic_conventions.h`
instead.
* The file
`sdk/include/opentelemetry/sdk/resource/experimental_semantic_conventions.h`
is deprecated, and will be removed in a future release.
Use file
`sdk/include/opentelemetry/sdk/resource/semantic_conventions.h`
instead.
* The function, declared in the global namespace
`uint32_t hashCode(const char *str, uint32_t h = 0)`
is deprecated, and will be removed in a future release.
No replacement will be provided.
Note that function `opentelemetry::utils::hashCode`,
declared in the ETW exporter, is not affected by this deprecation.
Breaking changes:
* [SEMANTIC CONVENTIONS] Upgrade to version 1.15.0
[#1761](https://github.com/open-telemetry/opentelemetry-cpp/pull/1761)
* Naming of semantic conventions has changed from uppercase constants,
like `SemanticConventions::SERVICE_NAME`,
to camel case, like `SemanticConventions::kServiceName`.
This is necessary to avoid collisions with macros in general,
which breaks the build on some platforms.
* Semantic conventions are flagged as experimental,
which is why this change is done in this release.
## [1.7.0] 2022-10-28
* [METRICS SDK] Validate Instrument meta data (name, unit, description) [#1713](https://github.com/open-telemetry/opentelemetry-cpp/pull/1713)
* [DOCS] Document libthrift 0.12.0 doesn't work with Jaeger exporter [#1714](https://github.com/open-telemetry/opentelemetry-cpp/pull/1714)
* [Metrics SDK] Add Monotonic Property to Sum Aggregation, and
unit tests for Up Down Counter [#1675](https://github.com/open-telemetry/opentelemetry-cpp/pull/1675)
* [Metrics SDK] Move Metrics Exemplar processing behind feature flag [#1710](https://github.com/open-telemetry/opentelemetry-cpp/pull/1710)
* [Metrics API/SDK] Change Meter API/SDK to return nostd::unique_ptr
for Sync Instruments [#1707](https://github.com/open-telemetry/opentelemetry-cpp/pull/1707)
which includes breaking change in the Metrics api and sdk.
* [BUILD] Add e2e test to asan & tsan CI [#1670](https://github.com/open-telemetry/opentelemetry-cpp/pull/1670)
* [BUILD] Add otlp-grpc example bazel [#1708](https://github.com/open-telemetry/opentelemetry-cpp/pull/1708)
* [TRACE SDK] Fix debug log of OTLP HTTP exporter and ES log exporter [#1703](https://github.com/open-telemetry/opentelemetry-cpp/pull/1703)
* [METRICS SDK] Fix a potential precision loss on integer in
ReservoirCellIndexFor [#1696](https://github.com/open-telemetry/opentelemetry-cpp/pull/1696)
* [METRICS SDK] Fix Histogram crash [#1685](https://github.com/open-telemetry/opentelemetry-cpp/pull/1685)
* [METRICS SDK] Fix:1676 Segfault when short export period is used for metrics [#1682](https://github.com/open-telemetry/opentelemetry-cpp/pull/1682)
* [METRICS SDK] Add timeout support to MeterContext::ForceFlush [#1673](https://github.com/open-telemetry/opentelemetry-cpp/pull/1673)
* [DOCS] - Minor updates to OStream Metrics exporter documentation [#1679](https://github.com/open-telemetry/opentelemetry-cpp/pull/1679)
* [DOCS] Fix:#1575 API Documentation for Metrics SDK and API [#1678](https://github.com/open-telemetry/opentelemetry-cpp/pull/1678)
* [BUILD] Fixed compiler warnings [#1677](https://github.com/open-telemetry/opentelemetry-cpp/pull/1677)
* [METRICS SDK] Fix threading issue between Meter::RegisterSyncMetricStorage
and Meter::Collect [#1666](https://github.com/open-telemetry/opentelemetry-cpp/pull/1666)
* [METRICS SDK] Fix data race on MeterContext::meters_ [#1668](https://github.com/open-telemetry/opentelemetry-cpp/pull/1668)
* [METRICS SDK] Fix observable Gauge metrics generation [#1651](https://github.com/open-telemetry/opentelemetry-cpp/pull/1651)
* [BUILD] Detect ARCH=sparc in CMake [#1660](https://github.com/open-telemetry/opentelemetry-cpp/pull/1660)
* [SDK] Add user agent for OTLP http/grpc client [#1657](https://github.com/open-telemetry/opentelemetry-cpp/pull/1657)
* [BUILD] Fix clang and gcc warnings [#1658](https://github.com/open-telemetry/opentelemetry-cpp/pull/1658)
* [Metrics SDK] Add Metrics ExemplarFilter and ExemplarReservoir [#1584](https://github.com/open-telemetry/opentelemetry-cpp/pull/1584)
* [LOGS SDK] Rename OnReceive to OnEmit [#1652](https://github.com/open-telemetry/opentelemetry-cpp/pull/1652)
* [METRICS SDK] Fix Observable Gauge does not reflect updated values,
and send the old value always [#1641](https://github.com/open-telemetry/opentelemetry-cpp/pull/1641)
* [Metrics SDK] Change boundary type to double for Explicit Bucket Histogram Aggregation,
and change default bucket range [#1626](https://github.com/open-telemetry/opentelemetry-cpp/pull/1626)
* [METRICS SDK] Fix occasional Segfault with LongCounter instrument [#1638](https://github.com/open-telemetry/opentelemetry-cpp/pull/1638)
* [BUILD] Bump vcpk to 2022.08.15 [#1633](https://github.com/open-telemetry/opentelemetry-cpp/pull/1633)
* [BUILD] Bump gRPC to v1.48.1 for CMake Linux CI [#1608](https://github.com/open-telemetry/opentelemetry-cpp/pull/1608)
* [Metrics] Switch to explicit 64 bit integers [#1686](https://github.com/open-telemetry/opentelemetry-cpp/pull/1686)
which includes breaking change in the Metrics api and sdk.
* [Metrics SDK] Add support for Pull Metric Exporter [#1701](https://github.com/open-telemetry/opentelemetry-cpp/pull/1701)
which includes breaking change in the Metrics api.
* [BUILD] Add CMake OTELCPP_MAINTAINER_MODE [#1650](https://github.com/open-telemetry/opentelemetry-cpp/pull/1650)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.14.0 [#1697](https://github.com/open-telemetry/opentelemetry-cpp/pull/1697)
Notes:
Metrics API/SDK GA release includes PRs [#1686](https://github.com/open-telemetry/opentelemetry-cpp/pull/1686),
[#1701](https://github.com/open-telemetry/opentelemetry-cpp/pull/1701), and
[#1707](https://github.com/open-telemetry/opentelemetry-cpp/pull/1707)
with breaking changes in the Metrics API and SDK.
## [1.6.1] 2022-09-22
* [BUILD] Upgrade opentelemetry-proto to v0.19.0 [#1579](https://github.com/open-telemetry/opentelemetry-cpp/pull/1579)
* [METRICS EXPORTER] Add `OtlpGrpcMetricExporterFactory` and `OtlpHttpMetricExporterFactory`.
[#1606](https://github.com/open-telemetry/opentelemetry-cpp/pull/1606)
* [SEMANTIC CONVENTIONS] Upgrade to version 1.13.0 [#1624](https://github.com/open-telemetry/opentelemetry-cpp/pull/1624)
* [BUILD] Fixes span creation benchmark issue. [#1622](https://github.com/open-telemetry/opentelemetry-cpp/pull/1622)
* [BUILD] Fix more build warnings (#1616) [#1620](https://github.com/open-telemetry/opentelemetry-cpp/pull/1620)
* [SDK gRPC]: Fix out-of-bounds access of string_view in GrpcClientCarrier in
the example
[#1619](https://github.com/open-telemetry/opentelemetry-cpp/pull/1619)
* [EXPORTER ETW] Add Trace flags in SpanContext [#1618](https://github.com/open-telemetry/opentelemetry-cpp/pull/1618)
* [SDK] resource sdk: Update Resource::Merge function docs [#1615](https://github.com/open-telemetry/opentelemetry-cpp/pull/1615)
* [BUILD] Fix build warnings [#1613](https://github.com/open-telemetry/opentelemetry-cpp/pull/1613)
* [API BUILD] Fix header only api singletons (#1520) [#1604](https://github.com/open-telemetry/opentelemetry-cpp/pull/1604)
* [METRICS SDK] Fix default value of
`OtlpHttpMetricExporterOptions::aggregation_temporality`.
[#1601](https://github.com/open-telemetry/opentelemetry-cpp/pull/1601)
* [METRICS EXAMPLE] Example for OTLP gRPC exporter for Metrics. [#1598](https://github.com/open-telemetry/opentelemetry-cpp/pull/1598)
* [SDK] Fix `LoggerContext::Shutdown` and tsan of `OtlpHttpClient` [#1592](https://github.com/open-telemetry/opentelemetry-cpp/pull/1592)
* [METRICS SDK] Fix 1585 - Multiple cumulative metric collections without
measurement recording.
[#1586](https://github.com/open-telemetry/opentelemetry-cpp/pull/1586)
* [BUILD] metrics warnings [#1583](https://github.com/open-telemetry/opentelemetry-cpp/pull/1583)
* [METRICS SDK] Fix ObservableInstrument::RemoveCallback [#1582](https://github.com/open-telemetry/opentelemetry-cpp/pull/1582)
* [SDK] Add error log when getting a http error code [#1581](https://github.com/open-telemetry/opentelemetry-cpp/pull/1581)
* [EXPORTER] ETW Exporter - Add support for Sampler and ID Generator [#1547](https://github.com/open-telemetry/opentelemetry-cpp/pull/1547)
Notes:
While [OpenTelemetry semantic
convention](https://github.com/open-telemetry/opentelemetry-specification/tree/main/semantic_conventions)
is still in experimental state, PR
[#1624](https://github.com/open-telemetry/opentelemetry-cpp/pull/1624) upgraded
it from 1.12.0 to 1.13.0 which **MAY** break the instrumentation library. Please
update the semantic convention in instrumentation library is needed.
## [1.6.0] 2022-08-15
* [METRICS SDK] Calling Observable Instruments callback during metrics
collection
[#1554](https://github.com/open-telemetry/opentelemetry-cpp/pull/1554)
* [METRICS CI] Add CI jobs for new and deprecated metrics [#1531](https://github.com/open-telemetry/opentelemetry-cpp/pull/1531)
* [METRICS BUILD] Fix metrics asan and tsan CI [#1562](https://github.com/open-telemetry/opentelemetry-cpp/pull/1562)
* [METRICS SDK] remove throw check from metrics with noexcept [#1560](https://github.com/open-telemetry/opentelemetry-cpp/pull/1560)
* [METRICS SDK] fix metrics race condition [#1552](https://github.com/open-telemetry/opentelemetry-cpp/pull/1552)
* [METRICS SDK] Fix metrics context circular reference [#1535](https://github.com/open-telemetry/opentelemetry-cpp/pull/1535)
* [METRICS EXPORTER] Improve scope/instrument names in metrics ostream exporter [#1544](https://github.com/open-telemetry/opentelemetry-cpp/pull/1544)
* [METRICS BUILD] fix IWYU error in instruments.h [#1555](https://github.com/open-telemetry/opentelemetry-cpp/pull/1555)
* [EXPORTER] Prometheus exporter support Gauge Type [#1553](https://github.com/open-telemetry/opentelemetry-cpp/pull/1553)
* [METRICS SDK] Fix default Metric view name [#1515](https://github.com/open-telemetry/opentelemetry-cpp/pull/1515)
* [SDK] Fix infinitely waiting when shutdown with more than one running http
sessions.
[#1549](https://github.com/open-telemetry/opentelemetry-cpp/pull/1549)
* [METRICS SDK] Fix OTLP gRPC Metrics env variables [#1543](https://github.com/open-telemetry/opentelemetry-cpp/pull/1543)
* [METRICS SDK] Metric aggregation temporality controls [#1541](https://github.com/open-telemetry/opentelemetry-cpp/pull/1541)
* [METRICS SDK] Histogram min/max support [#1540](https://github.com/open-telemetry/opentelemetry-cpp/pull/1540)
* [METRICS EXPORTER] ostream exporter should print out resource attributes [#1523](https://github.com/open-telemetry/opentelemetry-cpp/pull/1523)
* [METRICS SDK] Support multiple async callbacks [#1495](https://github.com/open-telemetry/opentelemetry-cpp/pull/1495)
* [BUILD] Fix code scanning alert [#1530](https://github.com/open-telemetry/opentelemetry-cpp/pull/1530)
* [BUILD] Fix several compiling/linking errors [#1539](https://github.com/open-telemetry/opentelemetry-cpp/pull/1539)
* [TRACE SDK] Add SpanData getter for Span Recordable [#1508](https://github.com/open-telemetry/opentelemetry-cpp/pull/1508)
* [LOG SDK] Fix log sdk builder (#1486) [#1524](https://github.com/open-telemetry/opentelemetry-cpp/pull/1524)
* [METRICS SDK] Add configuration options for Aggregation creation [#1513](https://github.com/open-telemetry/opentelemetry-cpp/pull/1513)
* [METRICS TEST] Fix metrics unit test memory leack [#1533](https://github.com/open-telemetry/opentelemetry-cpp/pull/1533)
* [LOG SDK] Add log sdk builders (#1486) [#1524](https://github.com/open-telemetry/opentelemetry-cpp/pull/1524)
## [1.5.0] 2022-07-29
* [EXPORTER BUILD] Add resources to dep list of prometheus exporter test [#1527](https://github.com/open-telemetry/opentelemetry-cpp/pull/1527)
* [BUILD] Don't require applications using jaeger exporter to know about libcurl
[#1518](https://github.com/open-telemetry/opentelemetry-cpp/pull/1518)
* [EXPORTER] Inline print_value() in ostream exporter [#1512](https://github.com/open-telemetry/opentelemetry-cpp/pull/1512)
* [SDK] fix: urlPaser will incorrect parsing url like `http://abc.com/xxx@xxx/a/b`
[#1511](https://github.com/open-telemetry/opentelemetry-cpp/pull/1511)
* [SDK] Rename `InstrumentationLibrary` to `InstrumentationScope` [#1507](https://github.com/open-telemetry/opentelemetry-cpp/pull/1507)
* [BUILD] Try to build nlohmann-json only it's depended. [#1505](https://github.com/open-telemetry/opentelemetry-cpp/pull/1505)
* [EXPORTER BUILD] Link opentelemetry_api to ETW exporter test [#1503](https://github.com/open-telemetry/opentelemetry-cpp/pull/1503)
* [SDK] Add automatically semantic conventions from the spec (#873) [#1497](https://github.com/open-telemetry/opentelemetry-cpp/pull/1497)
* [SDK] Use template class for in-memory data. [#1496](https://github.com/open-telemetry/opentelemetry-cpp/pull/1496)
* [SDK] fix compiler warnings [#1499](https://github.com/open-telemetry/opentelemetry-cpp/pull/1499)
* [TRACE SDK] Add trace sdk builders (#1393) [#1471](https://github.com/open-telemetry/opentelemetry-cpp/pull/1471)
* [METRICS BUILD] Enable bazel build for metrics proto files [#1489](https://github.com/open-telemetry/opentelemetry-cpp/pull/1489)
* [METRICS EXPORTER] Add metrics OTLP/HTTP exporter [#1487](https://github.com/open-telemetry/opentelemetry-cpp/pull/1487)
* [EXPORTER] fix otlp grpc exporter naming [#1488](https://github.com/open-telemetry/opentelemetry-cpp/pull/1488)
* [BUILD] Remove `--config Debug` when installing. [#1480](https://github.com/open-telemetry/opentelemetry-cpp/pull/1480)
* [EXPORTER] Fix endpoint in otlp grpc exporter [#1474](https://github.com/open-telemetry/opentelemetry-cpp/pull/1474)
* [EXAMPLE] Fix memory ownership of InMemorySpanExporter (#1473) [#1471](https://github.com/open-telemetry/opentelemetry-cpp/pull/1471)
* [EXPORTER TESTS] Prometheus unit test [#1461](https://github.com/open-telemetry/opentelemetry-cpp/pull/1461)
* [DOCS] Update docs to use relative code links. [#1447](https://github.com/open-telemetry/opentelemetry-cpp/pull/1447)
* [SDK] Remove reference to deprecated InstrumentationLibrary in OTLP [#1469](https://github.com/open-telemetry/opentelemetry-cpp/pull/1469)
* [SDK] Fix trace kIsSampled flag set incorrectly [#1465](https://github.com/open-telemetry/opentelemetry-cpp/pull/1465)
* [METRICS EXPORTER] OTLP gRPC Metrics Exporter [#1454](https://github.com/open-telemetry/opentelemetry-cpp/pull/1454)
* [EXPORTER] fix prometheus exporter failure type [#1460](https://github.com/open-telemetry/opentelemetry-cpp/pull/1460)
* [SDK] Fix build warnings about missing aggregates. [#1368](https://github.com/open-telemetry/opentelemetry-cpp/pull/1368)
* [EXT] `curl::HttpClient` use `curl_multi_handle` instead of creating a thread
for every request and it's able to reuse connections now. ([#1317](https://github.com/open-telemetry/opentelemetry-cpp/pull/1317))
* [SEMANTIC CONVENTIONS] Upgrade to version 1.12.0 [#873](https://github.com/open-telemetry/opentelemetry-cpp/pull/873)
## [1.4.1] 2022-06-19
* [METRICS SDK] Fix variables inizialization [#1430](https://github.com/open-telemetry/opentelemetry-cpp/pull/1430)
* [DOCS] Fixed broken link to OpenTelemetry.io (#1445) [#1446](https://github.com/open-telemetry/opentelemetry-cpp/pull/1446)
* [BUILD] Upgrade nlohmann_json to 3.10.5 (#1438) [#1441](https://github.com/open-telemetry/opentelemetry-cpp/pull/1441)
* [METRICS SDK] fix histogram [#1440](https://github.com/open-telemetry/opentelemetry-cpp/pull/1440)
* [DOCS] Fix GettingStarted documentation for Jaeger HTTP exporter (#1347) [#1439](https://github.com/open-telemetry/opentelemetry-cpp/pull/1439)
* [BUILD] install sdk-config.h [#1419](https://github.com/open-telemetry/opentelemetry-cpp/pull/1419)
* [EXAMPLE] Log current timestamp instead of epoch time [#1434](https://github.com/open-telemetry/opentelemetry-cpp/pull/1434)
* [METRICS SDK] Add attributes/dimensions to metrics ostream exporter [#1400](https://github.com/open-telemetry/opentelemetry-cpp/pull/1400)
* [SDK] Fix global log handle symbols when using dlopen [#1420](https://github.com/open-telemetry/opentelemetry-cpp/pull/1420)
* [METRICS] Only record non-negative / finite / Non-NAN histogram values([#1427](https://github.com/open-telemetry/opentelemetry-cpp/pull/1427))
* [ETW EXPORTER] Fix ETW log exporter header inclusion [#1426](https://github.com/open-telemetry/opentelemetry-cpp/pull/1426)
* [ETW EXPORTER] Copy string_view passed to ETW exporter in PropertyVariant [#1425](https://github.com/open-telemetry/opentelemetry-cpp/pull/1425)
* [METRICS API/SDK] Pass state to async callback function. [#1408](https://github.com/open-telemetry/opentelemetry-cpp/pull/1408)
* [BUILD] fix nlohmann_json's (third party) include dir [#1415](https://github.com/open-telemetry/opentelemetry-cpp/pull/1415)
* [SDK] fix: WaitOnSocket select error when sockfd above FD_SETSIZE [#1410](https://github.com/open-telemetry/opentelemetry-cpp/pull/1410)
* [SDK] fix OTEL_INTERNAL_LOG_INFO [#1407](https://github.com/open-telemetry/opentelemetry-cpp/pull/1407)
* [DOCS] Document Getting Started with Prometheus and Grafana [#1396](https://github.com/open-telemetry/opentelemetry-cpp/pull/1396)
## [1.4.0] 2022-05-17
* [API SDK] Upgrade proto to v0.17.0, update log data model ([#1383](https://github.com/open-telemetry/opentelemetry-cpp/pull/1383))
* [BUILD] Alpine image ([#1382](https://github.com/open-telemetry/opentelemetry-cpp/pull/1382))
* [LOGS SDK] Get span_id from context when Logger::Log received invalid span_id
([#1398](https://github.com/open-telemetry/opentelemetry-cpp/pull/1398))
* [METRICS SDK] Connect async storage with async instruments ([#1388](https://github.com/open-telemetry/opentelemetry-cpp/pull/1388))
* [DOCS] Getting started document using ostream exporter ([#1394](https://github.com/open-telemetry/opentelemetry-cpp/pull/1394))
* [BUILD] Fix missing link to nlohmann_json ([#1390](https://github.com/open-telemetry/opentelemetry-cpp/pull/1390))
* [SDK] Fix sharing resource in batched exported spans ([#1386](https://github.com/open-telemetry/opentelemetry-cpp/pull/1386))
* [PROTOCOL \& LOGS] Upgrade proto to v0.17.0, update log data model ([#1383](https://github.com/open-telemetry/opentelemetry-cpp/pull/1383))
* [METRICS SDK] Remove un-necessary files. ([#1379](https://github.com/open-telemetry/opentelemetry-cpp/pull/1379))
* [EXPORTER] Prometheus exporter meters and instrument name ([#1378](https://github.com/open-telemetry/opentelemetry-cpp/pull/1378))
* [API] Add noexcept/const qualifier at missing places for Trace API. ([#1374](https://github.com/open-telemetry/opentelemetry-cpp/pull/1374))
* [SDK] Fix empty tracestate header propagation ([#1373](https://github.com/open-telemetry/opentelemetry-cpp/pull/1373))
* [METRICS SDK] Reuse temporal metric storage for sync storage ([#1369](https://github.com/open-telemetry/opentelemetry-cpp/pull/1369))
* [SDK] Fix baggage propagation for empty/invalid baggage context ([#1367](https://github.com/open-telemetry/opentelemetry-cpp/pull/1367))
* [BUILD] Export opentelemetry_otlp_recordable ([#1365](https://github.com/open-telemetry/opentelemetry-cpp/pull/1365))
* [TESTS] Disable test on prometheus-cpp which not need ([#1363](https://github.com/open-telemetry/opentelemetry-cpp/pull/1363))
* [METRICS] Fix class member initialization order ([#1360](https://github.com/open-telemetry/opentelemetry-cpp/pull/1360))
* [METRICS SDK] Simplify SDK Configuration: Use View with default aggregation if
no matching View is configured
([#1358](https://github.com/open-telemetry/opentelemetry-cpp/pull/1358))
* [BUILD] Add missing include guard ([#1357](https://github.com/open-telemetry/opentelemetry-cpp/pull/1357))
* [ETW EXPORTER] Fix scalar delete against array ([#1356](https://github.com/open-telemetry/opentelemetry-cpp/pull/1356))
* [ETW EXPORTER] Conditional include for codecvt header ([#1355](https://github.com/open-telemetry/opentelemetry-cpp/pull/1355))
* [BUILD] Use latest TraceLoggingDynamic.h ([#1354](https://github.com/open-telemetry/opentelemetry-cpp/pull/1354))
* [SDK] Add explicit type cast in baggage UrlDecode ([#1353](https://github.com/open-telemetry/opentelemetry-cpp/pull/1353))
* [METRICS SDK] Remove exporter registration to meter provider ([#1350](https://github.com/open-telemetry/opentelemetry-cpp/pull/1350))
* [METRICS SDK] Fix output time in metrics OStream exporter ([#1346](https://github.com/open-telemetry/opentelemetry-cpp/pull/1346))
* [BUILD] ostream metrics cmake ([#1344](https://github.com/open-telemetry/opentelemetry-cpp/pull/1344))
* [BUILD] Link `opentelemetry_ext` with `opentelemetry_api` ([#1336](https://github.com/open-telemetry/opentelemetry-cpp/pull/1336))
* [METRICS SDK] Enable metric collection for Async Instruments - Delta and
Cumulative
([#1334](https://github.com/open-telemetry/opentelemetry-cpp/pull/1334))
* [BUILD] Dependencies image as artifact ([#1333](https://github.com/open-telemetry/opentelemetry-cpp/pull/1333))
* [EXAMPLE] Prometheus example ([#1332](https://github.com/open-telemetry/opentelemetry-cpp/pull/1332))
* [METRICS EXPORTER] Prometheus exporter ([#1331](https://github.com/open-telemetry/opentelemetry-cpp/pull/1331))
* [METRICS] Metrics histogram example ([#1330](https://github.com/open-telemetry/opentelemetry-cpp/pull/1330))
* [TESTS] Replace deprecated googletest API ([#1327](https://github.com/open-telemetry/opentelemetry-cpp/pull/1327))
* [BUILD] Fix Ninja path ([#1326](https://github.com/open-telemetry/opentelemetry-cpp/pull/1326))
* [API] Update yield logic for ARM processor ([#1325](https://github.com/open-telemetry/opentelemetry-cpp/pull/1325))
* [BUILD] Fix metrics compiler warnings ([#1328](https://github.com/open-telemetry/opentelemetry-cpp/pull/1328))
* [METRICS SDK] Implement Merge and Diff operation for Histogram Aggregation ([#1303](https://github.com/open-telemetry/opentelemetry-cpp/pull/1303))
Notes:
While opentelemetry-cpp Logs are still in experimental stage,
[#1383](https://github.com/open-telemetry/opentelemetry-cpp/pull/1383) updated
opentelemetry-proto to 0.17.0, which includes some breaking change in the
protocol, like
[this](https://github.com/open-telemetry/opentelemetry-proto/pull/373). This
makes `name` parameter for our log API unnecessary. However, this parameter is
marked deprecated instead of being removed in this release, and it will be
removed in future release.
## [1.3.0] 2022-04-11
* [ETW EXPORTER] ETW provider handle cleanup ([#1322](https://github.com/open-telemetry/opentelemetry-cpp/pull/1322))
* [BUILD] Move public definitions into `opentelemetry_api`. ([#1314](https://github.com/open-telemetry/opentelemetry-cpp/pull/1314))
* [METRICS] OStream example ([#1312](https://github.com/open-telemetry/opentelemetry-cpp/pull/1312))
* [BUILD] Rename `http_client_curl` to `opentelemetry_http_client_curl` ([#1301](https://github.com/open-telemetry/opentelemetry-cpp/pull/1301))
* [METRICS SDK] Add InstrumentationInfo and Resource to the metrics data to be
exported.
([#1299](https://github.com/open-telemetry/opentelemetry-cpp/pull/1299))
* [TESTS] Add building test without RTTI ([#1294](https://github.com/open-telemetry/opentelemetry-cpp/pull/1294))
* [METRICS SDK] Implement periodic exporting metric reader ([#1286](https://github.com/open-telemetry/opentelemetry-cpp/pull/1286))
* [SDK] Bugfix: span SetAttribute crash ([#1283](https://github.com/open-telemetry/opentelemetry-cpp/pull/1283))
* [BUG] Remove implicitly deleted default constructor ([#1267](https://github.com/open-telemetry/opentelemetry-cpp/pull/1267))
* [METRICS SDK] Synchronous Metric collection (Delta , Cumulative) ([#1265](https://github.com/open-telemetry/opentelemetry-cpp/pull/1265))
* [METRICS SDK] Metrics exemplar round 1 ([#1264](https://github.com/open-telemetry/opentelemetry-cpp/pull/1264))
* [EXPORTER] Fix: use CURLOPT_TIMEOUT_MS to config OtlpHttpExporter's timeout
instead of CURLOPT_TIMEOUT
([#1261](https://github.com/open-telemetry/opentelemetry-cpp/pull/1261))
* [EXPORTER] Jaeger Exporter - Populate Span Links ([#1251](https://github.com/open-telemetry/opentelemetry-cpp/pull/1251))
* [SDK] Reorder the destructor of members in LoggerProvider and TracerProvider ([#1245](https://github.com/open-telemetry/opentelemetry-cpp/pull/1245))
* [METRICS SDK] Enable metric collection from MetricReader ([#1241](https://github.com/open-telemetry/opentelemetry-cpp/pull/1241))
* [METRICS SDK] Asynchronous Aggregation storage ([#1232](https://github.com/open-telemetry/opentelemetry-cpp/pull/1232))
* [METRICS SDK] Synchronous Instruments - Aggregation Storage(s) creation for
configured views
([#1219](https://github.com/open-telemetry/opentelemetry-cpp/pull/1219))
* [BUILD] Added s390x arch into CMake build. ([#1216](https://github.com/open-telemetry/opentelemetry-cpp/pull/1216))
* [API] Allow extension of the lifetime of ContextStorage. ([#1214](https://github.com/open-telemetry/opentelemetry-cpp/pull/1214))
* [METRICS SDK] Add Aggregation storage ([#1213](https://github.com/open-telemetry/opentelemetry-cpp/pull/1213))
* [TESTS] Fix ostream_log_test Mac ([#1208](https://github.com/open-telemetry/opentelemetry-cpp/pull/1208))
* [BUILD] Update grpc to v1.43.2 to support VS2022/MSVC 19.30 and bazel 5.0 ([#1207](https://github.com/open-telemetry/opentelemetry-cpp/pull/1207))
* [DOCS] Benchmark documentation ([#1205](https://github.com/open-telemetry/opentelemetry-cpp/pull/1205))
* [DOCS] Fix errors in SDK documentation ([#1201](https://github.com/open-telemetry/opentelemetry-cpp/pull/1201))
* [METRICS EXPORTER] Ostream metric exporter ([#1196](https://github.com/open-telemetry/opentelemetry-cpp/pull/1196))
* [Metrics SDK] Filtering metrics attributes ([#1191](https://github.com/open-telemetry/opentelemetry-cpp/pull/1191))
* [Metrics SDK] Sync and Async Instruments SDK ([#1184](https://github.com/open-telemetry/opentelemetry-cpp/pull/1184))
* [Metrics SDK] Add Aggregation as part of metrics SDK. ([#1178](https://github.com/open-telemetry/opentelemetry-cpp/pull/1178))
* [BUILD] Cmake: thrift requires boost headers, include them as
Boost_INCLUDE_DIRS
([#1100](https://github.com/open-telemetry/opentelemetry-cpp/pull/1100))
Notes:
[#1301](https://github.com/open-telemetry/opentelemetry-cpp/pull/1301) added
`opentelemetry_` as prefix to http_client_curl library for resolving potential
naming conflict, this could break existing cmake build if http_client_curl is
listed as explicit dependency in user's cmake file.
## [1.2.0] 2022-01-31
* [CI] Continuous benchmark tests as part of the CI ([#1174](https://github.com/open-telemetry/opentelemetry-cpp/pull/1174))
* [API] Allow to use external abseil for bazel targets ([#1172](https://github.com/open-telemetry/opentelemetry-cpp/pull/1172))
* [EXPORTER] Importing gsl::span if std::span is not available ([#1167](https://github.com/open-telemetry/opentelemetry-cpp/pull/1167))
* [EXPORTER] Synchronized calls to Exporter::Export & Shutdown ([#1164](https://github.com/open-telemetry/opentelemetry-cpp/pull/1164))
* [EXPORTER] OTLP http exporter block thread ([#1163](https://github.com/open-telemetry/opentelemetry-cpp/pull/1163))
* [TESTS] Jaeger: ThriftSender unit test ([#1162](https://github.com/open-telemetry/opentelemetry-cpp/pull/1162))
* [EXPORTER] InMemorySpanExporter shutdown fix ([#1161](https://github.com/open-telemetry/opentelemetry-cpp/pull/1161))
* [EXPORTER] Fix leak in Jaeger exporter ([#1160](https://github.com/open-telemetry/opentelemetry-cpp/pull/1160))
* [TESTS] ZipkinExporter unit-tests ([#1155](https://github.com/open-telemetry/opentelemetry-cpp/pull/1155))
* [SDK] Logger: propagating resources through LoggerProvider ([#1154](https://github.com/open-telemetry/opentelemetry-cpp/pull/1154))
* [SDK] Logger: support for instrumentation library ([#1149](https://github.com/open-telemetry/opentelemetry-cpp/pull/1149))
* [SDK] Add log level for internal log of sdk ([#1147](https://github.com/open-telemetry/opentelemetry-cpp/pull/1147))
* [METRICS] Metrics SDK: View API ([#1110](https://github.com/open-telemetry/opentelemetry-cpp/pull/1110))
Notes on experimental features:
[#1149](https://github.com/open-telemetry/opentelemetry-cpp/pull/1149) and
[#1154](https://github.com/open-telemetry/opentelemetry-cpp/pull/1154) from
above CHANGELOG introduced API changes which are not backward compatible with
previous logs, please update API package to this release if
`ENABLE_LOGS_PREVIEW` is turned on (it is turned off by default).
## [1.1.1] 2021-12-20
* [SDK] Rename OTEL_CPP_GET_ATTR macro, and define it using fully qualified attr
function
([#1140](https://github.com/open-telemetry/opentelemetry-cpp/pull/1140))
* [SDK] Default resource attributes and attributes in OTEL_RESOURCE_ATTRIBUTES
are missing when using Otlp*LogExporter
([#1082](https://github.com/open-telemetry/opentelemetry-cpp/pull/1082))
* [METRICS] Add Meter and MeterProvider in the SDK
([#1078](https://github.com/open-telemetry/opentelemetry-cpp/pull/1078))
* [EXPORTER] ZipkinExporter shutdown
([#1153](https://github.com/open-telemetry/opentelemetry-cpp/pull/1153))
* [EXPORTER] Jaeger exporter shutdown
([#1150](https://github.com/open-telemetry/opentelemetry-cpp/pull/1150))
* [EXPORTER] Bugfix: `jaeger::TUDPTransport::write` crash when `getaddrinfo`
returns error
([#1116](https://github.com/open-telemetry/opentelemetry-cpp/pull/1116))
* [EXPORTER] Bugfix: Jaeger exporter: extend supported attributes types
([#1106](https://github.com/open-telemetry/opentelemetry-cpp/pull/1106))
* [EXPORTER] Fix otlp generates null span ids
([#1113](https://github.com/open-telemetry/opentelemetry-cpp/pull/1113))
* [EXPORTER] Jaeger bazel (Linux only)
([#1077](https://github.com/open-telemetry/opentelemetry-cpp/pull/1077))
* [DOCS] Add note on DLL support
([#1137](https://github.com/open-telemetry/opentelemetry-cpp/pull/1137))
* [DOCS] Improve the instructions for Bazel build
([#1136](https://github.com/open-telemetry/opentelemetry-cpp/pull/1136))
* [DOCS] Document dependencies
([#1119](https://github.com/open-telemetry/opentelemetry-cpp/pull/1119))
* [DOCS] Dockerfile for quick demo/troubleshooting purpose
([#905](https://github.com/open-telemetry/opentelemetry-cpp/pull/905))
* [TESTS] Fix data race in BM_ThreadYieldSpinLockThrashing
([#1099](https://github.com/open-telemetry/opentelemetry-cpp/pull/1099))
* [EXAMPLE] Otlp gRPC log example
([#1083](https://github.com/open-telemetry/opentelemetry-cpp/pull/1083))
* [BUILD] C++20 not Building with VS2019
([#1144](https://github.com/open-telemetry/opentelemetry-cpp/pull/1144))
* [BUILD] Mark tags to bazel
targets([#1075](https://github.com/open-telemetry/opentelemetry-cpp/pull/1075))
## [1.1.0] 2021-11-19
* [BUILD] build release tarball when nlohmann-json not installed
([#1074](https://github.com/open-telemetry/opentelemetry-cpp/pull/1074))
* [SDK] Bugfix: regex is neither working on GCC 4.9.x
([#1069](https://github.com/open-telemetry/opentelemetry-cpp/pull/1069))
* [SDK] Improvement: span_id should not break strict aliasing.
([#1068](https://github.com/open-telemetry/opentelemetry-cpp/pull/1068))
* [EXAMPLE] OTLP HTTP log example
([#1062](https://github.com/open-telemetry/opentelemetry-cpp/pull/1062))
* [SDK] OTLP gRPC log export should fail after shutdown
([#1064](https://github.com/open-telemetry/opentelemetry-cpp/pull/1064))
* [BUILD] Building otlp exporter from the release tarball
([#1056](https://github.com/open-telemetry/opentelemetry-cpp/pull/1056))
* [METRICS] Move old metrics implementation to different directory, and rename
targets to \_deprecated
([#1053](https://github.com/open-telemetry/opentelemetry-cpp/pull/1053))
* [EXPORTER] Add OTLP/gRPC Log Exporter
([#1048](https://github.com/open-telemetry/opentelemetry-cpp/pull/1048))
* [EXPORTER] Prometheus Exporter
([#1031](https://github.com/open-telemetry/opentelemetry-cpp/pull/1031))
* [EXPORTER] Add OTLP/HTTP Log Exporter
([#1030](https://github.com/open-telemetry/opentelemetry-cpp/pull/1030))
* [SDK] fix: issue 368- consistent namespace scope resolution
([#1008](https://github.com/open-telemetry/opentelemetry-cpp/pull/1008))
## [1.0.1] 2021-10-21
* [EXPORTER] Exports span attributes to ETW
([#1021](https://github.com/open-telemetry/opentelemetry-cpp/pull/1021))
* [BUILD] cmake: add FindThrift.cmake find module method for thrift
([#1020](https://github.com/open-telemetry/opentelemetry-cpp/pull/1020))
* [BUILD] Fix nlohmann_json package dependency
([#1017](https://github.com/open-telemetry/opentelemetry-cpp/pull/1017))
* [EXPORTER] Change OTLP/HTTP default port from 4317 to 4318
([#1018](https://github.com/open-telemetry/opentelemetry-cpp/pull/1018))
* [EXPORTER] ETW Log Exporter
([#1006](https://github.com/open-telemetry/opentelemetry-cpp/pull/1006))
* [API] Adding new Logger:log() method
([#1005](https://github.com/open-telemetry/opentelemetry-cpp/pull/1005))
* [EXPORTER] Remove scheme from OTLP endpoint before passing to gRPC
([#988](https://github.com/open-telemetry/opentelemetry-cpp/pull/988))
* [BUILD] Update opentelemetry-proto for bazel build to 0.9.0
([#984](https://github.com/open-telemetry/opentelemetry-cpp/pull/984))
* [BUILD] Cross compling grpc_cpp_plugin not found bug
([#982](https://github.com/open-telemetry/opentelemetry-cpp/pull/982))
* [EXPORTER] Support environment variables for both `OtlpGrpcExporter` and
`OtlpHttpExporter`
([#983](https://github.com/open-telemetry/opentelemetry-cpp/pull/983))
* [API/SDK] Add schema_url support to both Resource and InstrumentationLibrary
([#979](https://github.com/open-telemetry/opentelemetry-cpp/pull/979))
* [BUILD] Fix build issue where _memcpy_ was not declared in scope
([#985](https://github.com/open-telemetry/opentelemetry-cpp/issues/985))
## [1.0.0] 2021-09-16
### API
* Document DefaultSpan, remove DefaultTracer
([#959](https://github.com/open-telemetry/opentelemetry-cpp/pull/959))
* Separate baggage<->Context api from Baggage Propagator
([#963](https://github.com/open-telemetry/opentelemetry-cpp/pull/963))
* Remove unused public API to_span_ptr
([#964](https://github.com/open-telemetry/opentelemetry-cpp/pull/964))
* :collision: Make span context management public
([#967](https://github.com/open-telemetry/opentelemetry-cpp/pull/967))
* Support determining parent span from Context while creating new Span
([#969](https://github.com/open-telemetry/opentelemetry-cpp/pull/969))
* :collision: Traces: Add note on experimental semantic convention
implementation, prefix semantics headers with experimental tag
([#970](https://github.com/open-telemetry/opentelemetry-cpp/pull/970))
* Increment OPENTELEMETRY_ABI_VERSION_NO to 1
([#980](https://github.com/open-telemetry/opentelemetry-cpp/pull/980))
### SDK
* Clean up `GetEnvironmentVariable` and remove unused variable under `NO_GETENV`
([#976](https://github.com/open-telemetry/opentelemetry-cpp/pull/976))
* :collision: Resources: Add note on experimental semantic convention
implementation, prefix semantics headers with experimental tag
([#970](https://github.com/open-telemetry/opentelemetry-cpp/pull/970))
### OTLP Exporter
* :bug: Ignore status description if status code is not Error
([#962](https://github.com/open-telemetry/opentelemetry-cpp/pull/962))
* :collision: Make Otlp exporter configuration environment variables
specs-compliant
([#974](https://github.com/open-telemetry/opentelemetry-cpp/pull/974))
### Zipkin Exporter
* :bug: Don't set parentId in case parentId is empty
([#943](https://github.com/open-telemetry/opentelemetry-cpp/pull/943))
* :rocket: Extend zipkin exporter with ability to provide headers
([#951](https://github.com/open-telemetry/opentelemetry-cpp/pull/951))
### DOCS
* :book: Add getting-started documentation for SDK:
([#942](https://github.com/open-telemetry/opentelemetry-cpp/pull/942))
* :book: Remove unnecessary spaces and spelling of gRPC in README
([#965](https://github.com/open-telemetry/opentelemetry-cpp/pull/965))
### BUILD
* Disable bazel build for gcc 4.8, upgrade versions for grpc(v1.39.1) and
bazel(4.2.0), document bazel support
([#953](https://github.com/open-telemetry/opentelemetry-cpp/pull/953))
* Move CMake config template to cmake folder
([#958](https://github.com/open-telemetry/opentelemetry-cpp/pull/958))
* Enable CMake to search the new package variable `<PackageName>_ROOT`
([#975](https://github.com/open-telemetry/opentelemetry-cpp/pull/975))
* :bug: Do not override CMAKE_CXX_STANDARD
([#977](https://github.com/open-telemetry/opentelemetry-cpp/pull/977))
### :construction: Experiemental Features (Will change in future)
* Semantic Conventions for traces - As the specs is still experimental, the
implementation will change in future.
* Semantic Convention for resource - As the specs is still experimental, the
implementation will change in future.
* Logs and Metrics API & SDK - These are not compliant, and are behind feature
flag. Not recommended to use for now.
## [1.0.0-rc4] 2021-08-04
* [EXPORTER] `BREAKING CHANGE` Fix default HTTP port for OTLP HTTP Exporter
([#939](https://github.com/open-telemetry/opentelemetry-cpp/pull/939))
* [API] Fix timeout calculation for Tracer::Flush() and Tracer::Close()
([#937](https://github.com/open-telemetry/opentelemetry-cpp/pull/937))
* [API] Fix for Stack::Resize that new_capacity is not assigned to capacity_
([#934](https://github.com/open-telemetry/opentelemetry-cpp/pull/934))
* [SDK] Fix race condition in circular buffer simulation test
([#931](https://github.com/open-telemetry/opentelemetry-cpp/pull/931))
* [EXPORTER] Fix error logging in Jaeger Exporter
([#930](https://github.com/open-telemetry/opentelemetry-cpp/pull/930))
* [BUILD] Use latest grpc version (v1.39.0) for cmake build of otlp exporter
([#927](https://github.com/open-telemetry/opentelemetry-cpp/pull/927))
* [EXPORTER] Add Jaeger Thrift HTTP exporter
([#926](https://github.com/open-telemetry/opentelemetry-cpp/pull/926))
* [SDK] Move env-var read logic to common dir, and optional reading of env-var
([#924](https://github.com/open-telemetry/opentelemetry-cpp/pull/924))
* [EXPORTER] Remove recordable header from CMake install rules for exporters
([#923](https://github.com/open-telemetry/opentelemetry-cpp/pull/923))
* [EXPORTER] `BREAKING CHANGE` Rename Recordable to JaegerRecordable in Jaeger
exporter
([#919](https://github.com/open-telemetry/opentelemetry-cpp/pull/919))
* [EXPORTER] `BREAKING CHANGE` Rename Jaeger exporter target
([#918](https://github.com/open-telemetry/opentelemetry-cpp/pull/918))
* [EXPORTER] Add Zipkin exporter example
([#917](https://github.com/open-telemetry/opentelemetry-cpp/pull/917))
* [EXPORTER] Bazel build for Zipkin exorter
([#916](https://github.com/open-telemetry/opentelemetry-cpp/pull/916))
* [BUILD] Allow to use local GSL
([#915](https://github.com/open-telemetry/opentelemetry-cpp/pull/915))
* [DOCS] Document vcpkg toolchain configuration
([#913](https://github.com/open-telemetry/opentelemetry-cpp/pull/913))
* [SDK] Fix for resource deletion after tracer provider shutdown
([#911](https://github.com/open-telemetry/opentelemetry-cpp/pull/911))
* [BUILD] Add bazel build for grpc example
([#910](https://github.com/open-telemetry/opentelemetry-cpp/pull/910))
* [EXPORTER] Add resource and instrumentation library support for
OStreamSpanExporter
([#906](https://github.com/open-telemetry/opentelemetry-cpp/pull/906))
* [API] Adding semantic-convention attributes for trace
([#868](https://github.com/open-telemetry/opentelemetry-cpp/pull/868))
## [1.0.0-rc3] 2021-07-12
* [DOCS] Add doxygen reference docs for SDK
([#902](https://github.com/open-telemetry/opentelemetry-cpp/pull/902))
* [EXPORTER] Jaeger Exporter - Populate resource attributes into process tags in
Jaeger ([#897](https://github.com/open-telemetry/opentelemetry-cpp/pull/897))
* [EXPORTER] Zipkin Exporter - Report Event timestamp into microseconds
([#896](https://github.com/open-telemetry/opentelemetry-cpp/pull/896))
* [EXPORTER] Jaeger Exporter - Handle span events
([#895](https://github.com/open-telemetry/opentelemetry-cpp/pull/895))
* [DOCS] Fix API docs for Scope object
([#894](https://github.com/open-telemetry/opentelemetry-cpp/pull/894))
* [BUILD] Fix Linking error for libcurl on some macOS environments
([#893](https://github.com/open-telemetry/opentelemetry-cpp/pull/893))
* [API] Context cleanup from Runtime Storage
([#885](https://github.com/open-telemetry/opentelemetry-cpp/pull/885))
* [DOCS] Document strategy to avoid conflict between two different versions of
Abseil ([#883](https://github.com/open-telemetry/opentelemetry-cpp/pull/883/))
* [EXPORTER] ETW Exporter - Document example for ETW Exporter
([#882](https://github.com/open-telemetry/opentelemetry-cpp/pull/882))
* [SDK] Create Span with Valid spanId and traceId irrespective of Sampling
decision
([#879](https://github.com/open-telemetry/opentelemetry-cpp/pull/879))
* [EXPORTER] Jaeger Exporter - Rename bswap macros to avoid clash on some
systems ([#876](https://github.com/open-telemetry/opentelemetry-cpp/pull/876))
* [API] Add Semantics Conventions attributes for Resources
([#872](https://github.com/open-telemetry/opentelemetry-cpp/pull/872))
* [BUILD] Use nlohmann-json from submodules if not already installed
([#870](https://github.com/open-telemetry/opentelemetry-cpp/pull/870))
## [1.0.0-rc2] 2021-06-18
* [EXPORTER] Jaeger Exporter - Support for Instrumentation Library
([#864](https://github.com/open-telemetry/opentelemetry-cpp/pull/864))
* [TESTS] Adding benchmark tests for baggage api
([#861](https://github.com/open-telemetry/opentelemetry-cpp/pull/861))
* [BUILD] Fix for GCC9/C++20 Support for using STL for modern C++ features
([#860](https://github.com/open-telemetry/opentelemetry-cpp/pull/860))
* [TESTS] Adding benchmark tests for span create api
([#856](https://github.com/open-telemetry/opentelemetry-cpp/pull/856))
* [BUILD] Fix for using Abseil library for modern C++ features
([#850](https://github.com/open-telemetry/opentelemetry-cpp/pull/850))
* [BUILD] Fix issues with win32/x86 compilation
([#847](https://github.com/open-telemetry/opentelemetry-cpp/pull/847))
* [DOCS] Document OSS dependencies and their licenses
([#844](https://github.com/open-telemetry/opentelemetry-cpp/pull/844))
* [BUILD] Various fixes to build with Visual Studio 2015
([#840](https://github.com/open-telemetry/opentelemetry-cpp/pull/840))
* [INSTRUMENTATION] HTTPClient: Change support for full URL argument
([#833](https://github.com/open-telemetry/opentelemetry-cpp/pull/833))
* [EXPORTER] Jaeger Exporter - fix endianness of Jaeger IDs for transmission
([#832](https://github.com/open-telemetry/opentelemetry-cpp/pull/832))
* [INSTRUMENTATION] fix protobuf compilation warning in gRPC example
([#830](https://github.com/open-telemetry/opentelemetry-cpp/pull/830))
* [EXPORTER] `BREAKING CHANGE` - Add OTLP/HTTP+JSON Protocol exporter; Rename
`OtlpExporter` to `OtlpGrpcExporter`
([#810](https://github.com/open-telemetry/opentelemetry-cpp/pull/810))
## [1.0.0-rc1] 2021-06-04
* [BUILD] Enable Jaeger exporter build in Windows
([#815](https://github.com/open-telemetry/opentelemetry-cpp/pull/815))
* [DOCS] Versioning doc update to clarify release and versioning policy
([#811](https://github.com/open-telemetry/opentelemetry-cpp/pull/811))
* [LOGS] Move Logging implementation under feature-flag
([#807](https://github.com/open-telemetry/opentelemetry-cpp/pull/807))
* [BUILD] Filter metric headers files from `opentelemetry-api` and
`opentelemetry-sdk` targets if metrics feature-flag is disabled
([#806](https://github.com/open-telemetry/opentelemetry-cpp/pull/806))
* [BUILD] Fix install rule for ostream exporter, Jaeger, ETW, ElasticSearch
([#805](Fix install rule for header files of ostream exporter))
* [API/SDK] Switch from mpark::variant to absl::variant as default
([#771](https://github.com/open-telemetry/opentelemetry-cpp/pull/771))
* [API/SDK] Support `const char *` as acceptable data type for attributes and
resources
([#771](https://github.com/open-telemetry/opentelemetry-cpp/pull/771))
* [EXAMPLE] gRPC instrumentation example with context propagation
([#729](https://github.com/open-telemetry/opentelemetry-cpp/pull/729))
## [0.7.0] 2021-05-26
* [METRICS] Move metrics api/sdk under preview feature flag
([#745](https://github.com/open-telemetry/opentelemetry-cpp/pull/745))
* [DOCS] Add instructions to build using Bazel
([#747](https://github.com/open-telemetry/opentelemetry-cpp/pull/747))
* [DOCS] Update copyright headers
([#754](https://github.com/open-telemetry/opentelemetry-cpp/pull/754))
* [EXPORTER] Populate resource to OTLP proto data
([#758](https://github.com/open-telemetry/opentelemetry-cpp/pull/758))
* [CI] Add CodeQL security scan CI workflow
([#770](https://github.com/open-telemetry/opentelemetry-cpp/pull/770))
* [BUILD] Enable building API only CMake Project
([#778](https://github.com/open-telemetry/opentelemetry-cpp/pull/778))
* [SDK] Fix for sampling of root span
([#784](https://github.com/open-telemetry/opentelemetry-cpp/pull/784))
* [CI] Add Jaeger exporter to CMake CI build
([#786](https://github.com/open-telemetry/opentelemetry-cpp/pull/786))
* [API] `BREAKING CHANGE` - Tracer::WithActiveSpan() to return Scope object
intead of unique_ptr
([#788](https://github.com/open-telemetry/opentelemetry-cpp/pull/788))
* [DOCS] Add docs for nested spans and context propagation in readthedocs
([#792](https://github.com/open-telemetry/opentelemetry-cpp/pull/792))
* [CI] Output verbose error for failed unit-test in CI
([#796](https://github.com/open-telemetry/opentelemetry-cpp/pull/796))
## [0.6.0] 2021-05-11
* [EXPORTER] Add Jaeger exporter
([#534](https://github.com/open-telemetry/opentelemetry-cpp/pull/534))
* [SDK] Support multiple processors
([#692](https://github.com/open-telemetry/opentelemetry-cpp/pull/692))
* [SDK] Add instrumentation library and multiple tracer support
([#693](https://github.com/open-telemetry/opentelemetry-cpp/pull/693))
* [SDK] Resource integration with Exporters
([#706](https://github.com/open-telemetry/opentelemetry-cpp/pull/706))
* [EXAMPLE] Enhance existing http example with propagation
([#727](https://github.com/open-telemetry/opentelemetry-cpp/pull/727))
## [0.5.0] 2021-04-26
* [SDK] Support custom span-id and trace-id generator
([#681](https://github.com/open-telemetry/opentelemetry-cpp/pull/681))
* [SDK] Add SpanContext (and TraceState) to Recordable
([#667](https://github.com/open-telemetry/opentelemetry-cpp/pull/667))
* [SDK] Global Propagator
([#668](https://github.com/open-telemetry/opentelemetry-cpp/pull/668))
* [SDK] Create SharedContext for updating span pipeline
([#650](https://github.com/open-telemetry/opentelemetry-cpp/pull/650))
* [API] Baggage implementation
([#676](https://github.com/open-telemetry/opentelemetry-cpp/pull/676))
* [API] Move class from opentelemetry::core namespace to opentelemetry::common
namespace
([#686](https://github.com/open-telemetry/opentelemetry-cpp/pull/686))
## [0.4.0] 2021-04-12
* [EXPORTER] ETW Exporter enhancements
([#519](https://github.com/open-telemetry/opentelemetry-cpp/pull/519))
* [EXPORTER] Read Zipkin endpoint from environment variable.
([#624](https://github.com/open-telemetry/opentelemetry-cpp/pull/624))
* [EXPORTER] Split Zpages webserver hosting from Exporter
([#626](https://github.com/open-telemetry/opentelemetry-cpp/pull/626))
* [EXPORTER] ETW Exporter Usage Instructions
([#628](https://github.com/open-telemetry/opentelemetry-cpp/pull/628))
* [INSTRUMENTATION] HTTP Client/Server Instrumentation example
([#632](https://github.com/open-telemetry/opentelemetry-cpp/pull/632))
* [EXPORTER] Enable tls authentication for otlp grpc exporter ([#635](Enable tls
authentication for otlp grpc exporter))
* [API] Refactoring trace_state to reuse common functionality in baggage
([#638](https://github.com/open-telemetry/opentelemetry-cpp/pull/638/files))
## [0.3.0] 2021-03-19
* [EXPORTER] Added Zipkin Exporter.
([#471](https://github.com/open-telemetry/opentelemetry-cpp/pull/471))
* [API] Added Jaeger propagator.
([#599](https://github.com/open-telemetry/opentelemetry-cpp/pull/599))
* [PROPAGATOR] Added Composite Propagator
([#597](https://github.com/open-telemetry/opentelemetry-cpp/pull/597))
* [API] Propagate traceflag from parent
([#603](https://github.com/open-telemetry/opentelemetry-cpp/pull/603))
* [DOCS] Add sphinx support for api doc generation
([595](https://github.com/open-telemetry/opentelemetry-cpp/pull/595))
* [SDK] Add service.name if missing in Resource
([#616](https://github.com/open-telemetry/opentelemetry-cpp/pull/616))
## [0.2.0] 2021-03-02
* [SDK] Added `ForceFlush` to `TracerProvider`.
([#588](https://github.com/open-telemetry/opentelemetry-cpp/pull/588)).
* [SDK] Added Resource API.
([#502](https://github.com/open-telemetry/opentelemetry-cpp/pull/502))
* [API] Modified TraceState support for w3c trace context as per specs.
* [SDK] TraceState implementation as per spec
([#551](https://github.com/open-telemetry/opentelemetry-cpp/pull/551))
* [API] Added B3 Propagator.
([#523](https://github.com/open-telemetry/opentelemetry-cpp/pull/523))
* [Exporter] Added ETW Exporter.
([#376](https://github.com/open-telemetry/opentelemetry-cpp/pull/376))
* [CI] Enable cache for Bazel for faster builds.
([#505](https://github.com/open-telemetry/opentelemetry-cpp/pull/505))
## [0.0.1] 2020-12-16
### Added
* Trace API and SDK experimental
* OTLP Exporter
### Changed
### Removed
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