处理MySQL主从库数据不一致的问题【Slave_SQL

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处理MySQL主从库数据不一致的问题【Slave_SQL_Running: No】

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Jun 07, 2016 pm 04:47 PM

有同事需要把从库中的数据，同步一份到新环境，但发现在主库上执行count语句，和从库上执行count语句得出的结果不同。

场景：有同事需要把从库中的数据，同步一份到新环境，但发现在主库上执行count语句，和从库上执行count语句得出的结果不同。

解决思路：

在从库上执行 show slave status \G ，查看返回结果：

*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.118
Master_User: bak
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000728
Read_Master_Log_Pos: 586670704
Relay_Log_File: mysqld-relay-bin.002178
Relay_Log_Pos: 457911949
Relay_Master_Log_File: mysql-bin.000709
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB: mydb
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:

Last_Errno: 1062
Last_Error: Error 'Duplicate entry 'XXXXXXX' for key 2' on query. Default database: 'mydb'. Query: 'INSERT INTO `network` (`uuid`, `machine_name`, `port`, `update_time`) VALUES ('5''
Skip_Counter: 0
Exec_Master_Log_Pos: 457911812
Relay_Log_Space: 20988097167
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
1 row in set (0.00 sec)

发现从库在同步时出错，没有能正常同步，解决方法：

第一：停止slave,slave stop;

第二：跳过一条出错的语句：set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;

第三：启动slave,slave start;

第四：使用show slave status \G 查看当前的同步情况，如果Slave_SQL_Running: Yes，则成功，如果Slave_SQL_Running: No，则再次执行一到四。如果不想一次次重复，可以在第二步中跳过多条错误的语句。

最后看看当前从库与主库的时间差：Seconds_Behind_Master: 197011

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