MHA中的报错问题！_this operation cannot be performed with a running

MHA重新授权报错

问题：
ERROR 3021 (HY000): This operation cannot be performed with a running slave io thread; run STOP SLAVE IO_THREAD FOR CHANNEL ‘’ first.
  ## 错误3021 (HY000):这个操作不能在运行的io线程上执行;首先为通道运行STOP SLAVE IO_THREAD。

解决办法：
1、这时候需要在两台从服务器先关闭线程

mysql> stop slave;
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2、在 mysql1 主机上查看新的二进制文件和同步点

show master status;
+-------------------+----------+--------------+------------------+-------------------+
| File              | Positi
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