从服务器配置没问题，一台正常可以配置，另一台报错，错误信息如下所示
ERROR 3021 (HY000): This operation cannot be performed with a running slave io thread; run STOP SLAVE IO_THREAD FOR CHANNEL ‘’ first.
解决办法
1、停止已经启动的绑定
stop slave;
2、重置绑定
reset master;
3、执行复制主机命令
change master to master_host='192.168.235.150',master_user='myslave',master_password='123456',master_log_file='master-bin.000001',master_log_pos=604;
4、发现此时已经不报错
5、启动复制
start slave;