MySQL同步故障

"Slave_SQL_Running:No" 两种解决办法

故障现象：

进入slave服务器，运行：

mysql> show slave status\G

        .......
            Relay_Log_File: localhost-relay-bin.000535
             Relay_Log_Pos: 21795072
     Relay_Master_Log_File: localhost-bin.000094
           Slave_IO_Running:Yes
          Slave_SQL_Running: No
           Replicate_Do_DB: 
       Replicate_Ignore_DB: 
      ......

解决办法一、

Slave_SQL_Running: No
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.

一般是事务回滚造成的：
解决办法：
mysql> slave stop;
mysql> set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
mysql> slave start;

 

解决办法二、

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

进入master

mysql> show master status;
+----------------------+----------+--------------+------------------+
|File                | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+----------------------+----------+--------------+------------------+
| localhost-bin.000094 | 33622483|             |                 | 
+----------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

 

然后到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=3306, 
> master_log_file=localhost-bin.000094', 
> master_log_pos=33622483 ;
1 row in set (0.00 sec)
mysql> slave start;
1 row in set (0.00 sec)

 

mysql> show slave status\G
*************************** 1. row***************************
........
           Master_Log_File: localhost-bin.000094
       Read_Master_Log_Pos: 33768775
            Relay_Log_File: localhost-relay-bin.000537
             Relay_Log_Pos: 1094034
     Relay_Master_Log_File: localhost-bin.000094
           Slave_IO_Running:Yes
         Slave_SQL_Running: Yes
           Replicate_Do_DB:

手动同步需要停止master的写操作！ 

Slave_IO_Running:No

SLAVE STOP; 
CHANGE MASTER TO MASTER_LOG_FILE='mysqlcncnmaster.000079',MASTER_LOG_POS=183913220; 
SLAVE START;