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: 165661
 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 '1438019' 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 ('2012061310001851', 'Your order ORD201205A000016 was bounced back', 1339585744, 44, 1, 43, 1, 3, 4, 0, 1339585744, 0, 1, current_timestamp, 43, current_timestamp, 43)'
 Skip_Counter: 0
 Exec_Master_Log_Pos: 41969067
 Relay_Log_Space: 625695
 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 '1438019' 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 ('2012061310001851', 'Your order ORD201205A000016 was bounced back', 1339585744, 44, 1, 43, 1, 3, 4, 0, 1339585744, 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.