MariaDB stop slave用法

1、环境描述
MariaDB 10.1.35
CentOS 6.8

2、stop slave命令

root@MariaDB0 07:55:  [(none)]> help stopERROR 2006 (HY000): MySQL server has gone awayNo connection. Trying to reconnect...Connection id:    21Current database: *** NONE ***Name: 'STOP SLAVE'Description:Syntax:STOP SLAVE [thread_types]thread_types:    [thread_type [, thread_type] ... ]thread_type: IO_THREAD | SQL_THREADStops the slave threads. STOP SLAVE requires the SUPER privilege.Recommended best practice is to execute STOP SLAVE on the slave beforestopping the slave server (seehttp://dev.mysql.com/doc/refman/5.5/en/server-shutdown.html, for moreinformation).When using the row-based logging format: You should execute STOP SLAVEon the slave prior to shutting down the slave server if you arereplicating any tables that use a nontransactional storage engine (seethe Note later in this section). In MySQL 5.5.9 and later, you can alsouse STOP SLAVE SQL_THREAD for this purpose.Like START SLAVE, this statement may be used with the IO_THREAD andSQL_THREAD options to name the thread or threads to be stopped.*Note*: In MySQL 5.5, STOP SLAVE waits until the current replicationevent group affecting one or more non-transactional tables has finishedexecuting (if there is any such replication group), or until the userissues a KILL QUERY or KILL CONNECTION statement. (Bug #319, Bug#38205)URL: https://mariadb.com/kb/en/stop-slave/root@MariaDB0 09:07:  [(none)]> root@MariaDB0 09:07:  [(none)]> show slave status\G;*************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.56.101                  Master_User: repl                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-bin.000005          Read_Master_Log_Pos: 335               Relay_Log_File: relay-bin.000015                Relay_Log_Pos: 627        Relay_Master_Log_File: mysql-bin.000005             Slave_IO_Running: Yes            Slave_SQL_Running: Yes              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: 335              Relay_Log_Space: 5452              Until_Condition: None               Until_Log_File:                 Until_Log_Pos: 0           Master_SSL_Allowed: No           Master_SSL_CA_File:            Master_SSL_CA_Path:               Master_SSL_Cert:             Master_SSL_Cipher:                Master_SSL_Key:         Seconds_Behind_Master: 0Master_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: No                  Gtid_IO_Pos:       Replicate_Do_Domain_Ids:   Replicate_Ignore_Domain_Ids:                 Parallel_Mode: conservative1 row in set (0.00 sec)ERROR: No query specifiedroot@MariaDB0 09:07:  [(none)]> stop slave io_thread;ERROR 2006 (HY000): MySQL server has gone awayNo connection. Trying to reconnect...Connection id:    22Current database: *** NONE ***Query OK, 0 rows affected (0.01 sec)root@MariaDB0 09:09:  [(none)]> stop slave sql_thread;Query OK, 0 rows affected (0.00 sec)root@MariaDB0 09:09:  [(none)]> start slave io_thread;Query OK, 0 rows affected (0.00 sec)root@MariaDB0 09:10:  [(none)]> start slave sql_thread;Query OK, 0 rows affected (0.00 sec)root@MariaDB0 09:10:  [(none)]> show slave status\G;*************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.56.101                  Master_User: repl                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-bin.000005          Read_Master_Log_Pos: 335               Relay_Log_File: relay-bin.000016                Relay_Log_Pos: 541        Relay_Master_Log_File: mysql-bin.000005             Slave_IO_Running: Yes            Slave_SQL_Running: Yes              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: 335              Relay_Log_Space: 6040              Until_Condition: None               Until_Log_File:                 Until_Log_Pos: 0           Master_SSL_Allowed: No           Master_SSL_CA_File:            Master_SSL_CA_Path:               Master_SSL_Cert:             Master_SSL_Cipher:                Master_SSL_Key:         Seconds_Behind_Master: 0Master_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: No                  Gtid_IO_Pos:       Replicate_Do_Domain_Ids:   Replicate_Ignore_Domain_Ids:                 Parallel_Mode: conservative1 row in set (0.00 sec)ERROR: No query specifiedroot@MariaDB0 09:10:  [(none)]> stop slave;Query OK, 0 rows affected (0.00 sec)root@MariaDB0 09:10:  [(none)]> start slave;Query OK, 0 rows affected (0.00 sec)root@MariaDB0 09:10:  [(none)]>