MySQL主从复制不能同步，查看slave状态，报错如下：
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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:
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