MySQL主从复制不能同步，查看slave状态，报错如下：
mysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.0.134 Master_User: slave Master_Port: 3306 Connect_Retry: 60 Master_Log_File: master-bin.000006 Read_Master_Log_Pos: 520 Relay_Log_File: relay-log-bin.000028 Relay_Log_Pos: 252 Relay_Master_Log_File: master-bin.000006 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 1008 Last_Error: Error 'Can't drop database 'aaa'; database doesn't exist' on query. Default database: ''. Query: 'drop database aaa' Skip_Counter: 1 Exec_Master_Log_Pos: 356 Relay_Log_Space: 868 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: NULL Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 1008 Last_SQL_Error: Error 'Can't drop database 'aaa'; database doesn't exist' on query. Default database: ''. Query: 'drop database aaa' 1 row in set (0.00 sec)
解决办法：
mysql> stop slave; Query OK, 0 rows affected (0.00 sec) mysql> set global sql_slave_skip_counter = 1; # 将同步指针向下移动一个，可以重复操作 mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.0.134 Master_User: slave Master_Port: 3306 Connect_Retry: 60 Master_Log_File: master-bin.000006 Read_Master_Log_Pos: 520 Relay_Log_File: relay-log-bin.000030 Relay_Log_Pos: 252 Relay_Master_Log_File: master-bin.000006 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: 520 Relay_Log_Space: 551 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: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: 1 row in set (0.00 sec)
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