机房断电导致MySQL同步1594错误

1、错误信息

Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'log event entry exceeded max_allowed_packet; Increase max_allowed_packet on master; the first event 'mysql-bin.001931' at 208645932, the last event read from '/home/mysql/data3002/mysql/mysql-bin.001931' at 208645932, the last byte read from '/home/mysql/data3002/mysql/mysql-bin.001931' at 208645951.'
               Last_SQL_Errno: 1594
               Last_SQL_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's relay log is corrupted (you can check this by running 'mysqlbinlog' on the relay log), a network problem, or a bug in the master's or slave's MySQL code. If you want to check the master's binary log or slave's relay log, you will be able to know their names by issuing 'SHOW SLAVE STATUS' on this slave.

2、问题解决

　　由于使用的是GTID同步，所以不能用change master to master_log_file='mysql-bin.xxx', master_log_pos='xxx';

mysql> stop slave
    -> ;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> reset slave;
Query OK, 0 rows affected (1.38 sec)

mysql> change master to master_auto_position=1;
Query OK, 0 rows affected (1.02 sec)

mysql> start slave;
Query OK, 0 rows affected (0.11 sec)

3、结果查看

mysql> show slave status G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: xxx
                  Master_User: xxx
                  Master_Port: xxx
                Connect_Retry: 60
              Master_Log_File: mysql-bin.001931
          Read_Master_Log_Pos: 77477110
               Relay_Log_File: mysql-relay.000002
                Relay_Log_Pos: 408
        Relay_Master_Log_File: mysql-bin.001931
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes