connect  slave,127.0.0.1,root,,,$SERVER_MYPORT_3;
change master 'master1' to 
master_port=MYPORT_1, 
master_host='127.0.0.1', master_ssl_verify_server_cert=0,
master_user='root';
start slave 'master1';
set default_master_connection = 'master1';
include/wait_for_slave_to_start.inc
connect  master1,127.0.0.1,root,,,$SERVER_MYPORT_1;
drop table if exists t1;
create table t1 (i int) engine=MyISAM;
insert into t1 values (1),(2);
connection slave;
stop slave 'master1';
show slave 'master1' status;
Slave_IO_State 
Master_Host 127.0.0.1
Master_User root
Master_Port MYPORT_1
Connect_Retry 60
Master_Log_File master-bin.000001
Read_Master_Log_Pos <read_master_log_pos>
Relay_Log_File mysqld-relay-bin-master1.000002
Relay_Log_Pos <relay_log_pos>
Relay_Master_Log_File master-bin.000001
Slave_IO_Running No
Slave_SQL_Running No
Replicate_Do_DB 
Replicate_Ignore_DB 
Replicate_Do_Table 
Replicate_Ignore_Table 
Replicate_Wild_Do_Table 
Replicate_Wild_Ignore_Table 
Last_Errno 0
Last_Error 
Skip_Counter 0
Exec_Master_Log_Pos <read_master_log_pos>
Relay_Log_Space <relay_log_space>
Until_Condition None
Until_Log_File 
Until_Log_Pos 0
Master_SSL_Allowed Yes
Master_SSL_CA_File 
Master_SSL_CA_Path 
Master_SSL_Cert 
Master_SSL_Cipher 
Master_SSL_Key 
Seconds_Behind_Master NULL
Master_SSL_Verify_Server_Cert No
Last_IO_Errno 0
Last_IO_Error 
Last_SQL_Errno 0
Last_SQL_Error 
Replicate_Ignore_Server_Ids 
Master_Server_Id 1
Master_SSL_Crl 
Master_SSL_Crlpath 
Using_Gtid Slave_Pos
Gtid_IO_Pos 0-1-3
Replicate_Do_Domain_Ids 
Replicate_Ignore_Domain_Ids 
Parallel_Mode optimistic
SQL_Delay 0
SQL_Remaining_Delay NULL
Slave_SQL_Running_State 
Slave_DDL_Groups 2
Slave_Non_Transactional_Groups 1
Slave_Transactional_Groups 0
Replicate_Rewrite_DB 
Connects_Tried 1
Master_Retry_Count 100000
mysqld-relay-bin-master1.000001
mysqld-relay-bin-master1.000002
mysqld-relay-bin-master1.index
reset slave 'master1';
show slave 'master1' status;
Slave_IO_State 
Master_Host 127.0.0.1
Master_User root
Master_Port MYPORT_1
Connect_Retry 60
Master_Log_File 
Read_Master_Log_Pos 4
Relay_Log_File 
Relay_Log_Pos <relay_log_pos>
Relay_Master_Log_File 
Slave_IO_Running No
Slave_SQL_Running No
Replicate_Do_DB 
Replicate_Ignore_DB 
Replicate_Do_Table 
Replicate_Ignore_Table 
Replicate_Wild_Do_Table 
Replicate_Wild_Ignore_Table 
Last_Errno 0
Last_Error 
Skip_Counter 0
Exec_Master_Log_Pos 0
Relay_Log_Space <relay_log_space>
Until_Condition None
Until_Log_File 
Until_Log_Pos 0
Master_SSL_Allowed Yes
Master_SSL_CA_File 
Master_SSL_CA_Path 
Master_SSL_Cert 
Master_SSL_Cipher 
Master_SSL_Key 
Seconds_Behind_Master NULL
Master_SSL_Verify_Server_Cert No
Last_IO_Errno 0
Last_IO_Error 
Last_SQL_Errno 0
Last_SQL_Error 
Replicate_Ignore_Server_Ids 
Master_Server_Id 0
Master_SSL_Crl 
Master_SSL_Crlpath 
Using_Gtid Slave_Pos
Gtid_IO_Pos 
Replicate_Do_Domain_Ids 
Replicate_Ignore_Domain_Ids 
Parallel_Mode optimistic
SQL_Delay 0
SQL_Remaining_Delay NULL
Slave_SQL_Running_State 
Slave_DDL_Groups 2
Slave_Non_Transactional_Groups 1
Slave_Transactional_Groups 0
Replicate_Rewrite_DB 
Connects_Tried 0
Master_Retry_Count 100000
reset slave 'master1' all;
show slave 'master1' status;
ERROR HY000: There is no master connection 'master1'
drop table t1;
include/reset_master_slave.inc
disconnect slave;
connection master1;
drop table t1;
include/reset_master_slave.inc
disconnect master1;