mysql主从复制丛库IO进程问题的实例分析

配置mysql主从复制，启动slave进程后查看slave状态是IO进程报错：
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).

原因：丛库server-id参数和主库相同，需要修改为其它值，并重启丛库（此案例中修改后没有重启）