由于主服务器异外重启, 导致从报错, 错误如下:
show slave status错误:
mysql> show slave status\G Master_Log_File: mysql-bin.000288 Read_Master_Log_Pos: 627806304 Relay_Log_File: mysql-relay-bin.000990 Relay_Log_Pos: 627806457 Relay_Master_Log_File: mysql-bin.000288 Slave_IO_Running: No Slave_SQL_Running: Yes Exec_Master_Log_Pos: 627806304 Relay_Log_Space: 627806663
...... Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from impossible position'
mysql错误日志:
tail /data/mysql/mysql-error.log 111010 17:35:49 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position ( server_errno=1236) 111010 17:35:49 [ERROR] Slave I/O: Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from impossible position', Error_code: 1236 111010 17:35:49 [Note] Slave I/O thread exiting, read up to log 'mysql-bin.000288', position 627806304
[root@db1 ~]# mysqlbinlog /data/mysql/binlog/mysql-bin.000288 > mysql-bin.000288.sql less mysql-bin.000288.sql 看最后一部分 # at 627625495 #111010 16:35:46 server id 1 end_log_pos 627625631 Query thread_id=45613333 exec_time=32758 error_code=0 SET TIMESTAMP=1318289746/*!*/; delete from freeshipping_bef_update where part='AR-4006WLM' and code='' /*!*/; # at 627625631 #111010 16:35:46 server id 1 end_log_pos 627625751 Query thread_id=45613333 exec_time=32758 error_code=0 SET TIMESTAMP=1318289746/*!*/; delete from shippingFee_special where part='AR-4006WLM' /*!*/; DELIMITER ; # End of log file ROLLBACK /* added by mysqlbinlog */; /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
找到最接近错误标记627655136的一个position是627625631.
再回到slave机器上change master, 将postion指向这个位置.
mysql> stop slave; Query OK, 0 rows affected (0.00 sec) mysql> change master to master_log_file='mysql-bin.000288',master_log_pos=627625631; Query OK, 0 rows affected (0.06 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec)
再次查看
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Queueing master event to the relay log
Master_Host: 192.168.21.105
Master_User: rep
Master_Port: 3306
Connect_Retry: 10
Master_Log_File: mysql-bin.000289
Read_Master_Log_Pos: 25433767
Relay_Log_File: mysql-relay-bin.000003
Relay_Log_Pos: 630
Relay_Master_Log_File: mysql-bin.000289
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
主从同步正常了, 同样的方法修复其它slave机器.