mysql主从库同步错误：1062 Error ‘Duplicate entry ” for key ‘PRIMARY” on query
mysql主从库在同步时会发生1062 Last_SQL_Error: Error ‘Duplicate entry ‘的问题：
显然这个问题是因为插入重复主键导致从库不工作了，错误消息如下
mysql> show slave status\G;
* 1. row *
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.10.100
Master_User: slave_user
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000773
Read_Master_Log_Pos: 63325
Relay_Log_File: server122-relay-bin.000002
Relay_Log_Pos:
Relay_Master_Log_File: mysql-bin.000771
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: 1062
Last_Error: Error ‘Duplicate entry ” for key ‘PRIMARY” on query. Default database: ‘otrs’. Query: ‘INSERT INTO ticket (tn, title, create_time_unix, queue_id, ticket_lock_id, user_id, group_id, ticket_priority_id, ticket_state_id, ticket_answered, escalation_start_time, timeout, valid_id, create_time, create_by, change_time, change_by) VALUES (‘01851’, ‘Your order ORDA000016 was bounced back’, , 44, 1, 43, 1, 3, 4, 0, , 0, 1, current_timestamp, 43, current_timestamp, 43)’
Skip_Counter: 0
Exec_Master_Log_Pos:
Relay_Log_Space:
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: 1062
Last_SQL_Error: Error ‘Duplicate entry ” for key ‘PRIMARY” on query. Default database: ‘otrs’. Query: ‘INSERT INTO ticket (tn, title, create_time_unix, queue_id, ticket_lock_id, user_id, group_id, ticket_priority_id, ticket_state_id, ticket_answered, escalation_start_time, timeout, valid_id, create_time, create_by, change_time, change_by) VALUES (‘01851’, ‘Your order ORDA000016 was bounced back’, , 44, 1, 43, 1, 3, 4, 0, , 0, 1, current_timestamp, 43, current_timestamp, 43)’
1 row in set (0.00 sec)
ERROR:
No query specified
解决的办法是在从库上执行:
mysql> slave stop;
mysql> set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
mysql> slave start;
上面的方法可以解决问题，还有一种解决问题的办法是通过修改mysql的配置文件，让从库的同步线程忽略这个错误，方法：
修改mysql配置文件 /etc/my.cnf 在 [mysqld]下加一行 slave_skip_errors = 1062 ,保存.重启mysql. mysql slave可以正常同步了.
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