[MySQL生产环境复制故障修复] Last_IO_Errno: 1045 Last_IO_Error: error connecting to master 'replication@
1 修复集群，start slave 报错如下：
mysql> show slave status\G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.24.54.18 Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000660 Read_Master_Log_Pos: 34886442 Relay_Log_File: mysql-relay-bin.001320 Relay_Log_Pos: 253 Relay_Master_Log_File: mysql-bin.000660 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: 34886442 Relay_Log_Space: 452 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: 21 row in set (0.00 sec)
总结：DBA最重要的一点：细心，与大家共勉
