2008年3月19日星期三

MySQL同步故障:" Slave_SQL_Running:No"

今天检查数据库发现一台MySQL Slave未和主机同步,查看Slave状态:
mysql> show slave status\G
Slave_IO_Running: Yes
Slave_SQL_Running: No
Last_Errno: 1062
....
Seconds_Behind_Master:NULL

原因:
1.程序可能在slave上进行了写操作
2.也可能是slave机器重起后,事务回滚造成的.

解决办法I:
1.首先停掉Slave服务:slave stop
到主服务器上查看主机状态:
记录File和Position对应的值。


mysql> show master status;
+------------------+-----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+-----------+--------------+------------------+
| mysql-bin.000020 | 135617781 | | |
+------------------+-----------+--------------+------------------+
1 row in set (0.00 sec)

3.到slave服务器上执行手动同步:

mysql> change master to
> master_host='master_ip',
> master_user='user',
> master_password='pwd',
> master_port=3307,
> master_log_file='mysql-bin.000020',
> master_log_pos=135617781;
1 row in set (0.00 sec)
mysql> slave start;
1 row in set (0.00 sec)

再次查看slave状态发现:
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
...
Seconds_Behind_Master: 0
解决办法II:
mysql> slave stop;
mysql> set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
mysql> slave start;

1 条评论:

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