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报错：
1）
change master导致的：last_io_error: error connecting to master 'repl1@ip:3306' - retry-time: 60 retries 2）
在没有解锁的情况下停止slave进程：mysql> stop slave;ERROR 1192 (HY000): Can't execute the given command because you have active locked tables or an active transaction 3）
change master语法错误，落下逗号mysql> change master to-> master_host='IP'-> master_user='USER',-> master_password='PASSWD',-> master_log_file='mysql-bin.000002',-> master_log_pos=106;ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'master_user='USER',master_password='PASSWD',master_log_file='mysql-bin.000002' at line 3 MySQL（Linux）
MySQL 9.6.0是面向Linux平台的2026年创新版本，核心架构迎来重大革新。其将外键约束与级联操作从InnoDB引擎层上移至SQL层，确保所有数据变更均被完整记录至Binlog，彻底解决了CDC（变更数据捕获）与主从复制中的数据不一致难题。此外，该版本引入container_aware启动选项以原生适配容器环境，并对审计日志进行了组件化重构，为追求极致数据一致性与云原生体验的开发者提供了全新选择。
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在没有停止slave进程的情况下change master mysql> change master to master_host=‘IP', master_user='USER', master_password='PASSWD', master_log_file='mysql-bin.000001',master_log_pos=106;ERROR 1198 (HY000): This operation cannot be performed with a running slave; run STOP SLAVE first 5）
A B的server-id相同：Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids;these ids must be different for replication to work (or the --replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it).
查看server-id mysql> show variables like 'server_id';手动修改server-id mysql> set global server_id=2; #此处的数值和my.cnf里设置的一样就行mysql> slave start;6）change master之后，查看slave的状态，发现slave_IO_running 为NO需要注意的是，做完上述操作之后最后重启mysql进程摘自：ANLJF的专栏bitsCN.com