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1、从库上看到如下错误
mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.18.10.11 Master_User: rep Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000021 Read_Master_Log_Pos: 273 Relay_Log_File: mysql-relay-bin.000051 Relay_Log_Pos: 336 Relay_Master_Log_File: mysql-bin.000021 Slave_IO_Running: Yes Slave_SQL_Running: No 从库SQL线程已经停止 Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 1007 报错（错误代码1007） Last_Error: Error ‘Can‘t create database ‘shaw‘; database exists‘ on query. Default database: ‘shaw‘. Query: ‘create database shaw‘ Skip_Counter: 0 Exec_Master_Log_Pos: 190 Relay_Log_Space: 721 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: 1007 Last_SQL_Error: Error ‘Can‘t create database ‘shaw‘; database exists‘ on query. Default database: ‘shaw‘. Query: ‘create database shaw‘ Replicate_Ignore_Server_Ids: Master_Server_Id: 1 1 row in set (0.00 sec)
2、查看错误代码，确定错误类型
3、根据错误提示和错误代码，我们可以确定，从库已经有"shaw",这个库，导致同步主库上的"shaw"库时，发生冲突
4、解决方法（从库上操作）
mysql> stop slave; Query OK, 0 rows affected (0.00 sec) mysql> set global sql_slave_skip_counter=1; Query OK, 0 rows affected (0.00 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec)
5、再次查看状态（从库）
mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.18.10.11 Master_User: rep Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000021 Read_Master_Log_Pos: 273 Relay_Log_File: mysql-relay-bin.000052 Relay_Log_Pos: 253 Relay_Master_Log_File: mysql-bin.000021 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: 273 Relay_Log_Space: 721 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: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 1 row in set (0.00 sec)
6、测试主从同步是否正常
mysql> show databases; 主库数据 +--------------------+ | Database | +--------------------+ | information_schema | | gamedb | | mysql | | performance_schema | | shaw | | test | +--------------------+
mysql> show databases; 从库数据 +--------------------+ | Database | +--------------------+ | information_schema | | gamedb | | mysql | | performance_schema | | shaw | | test | +--------------------+
mysql> drop database shaw; 主库上删除数据 Query OK, 0 rows affected (0.01 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | gamedb | | mysql | | performance_schema | | test | +--------------------+
mysql> show databases; 从库已经同步主库数据 +--------------------+ | Database | +--------------------+ | information_schema | | gamedb | | mysql | | performance_schema | | test | +--------------------+
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原文地址：http://my.oschina.net/u/2428313/blog/496967
