MySQL master-slave synchronization failure: Slave_SQL_Running: No two solutions

 

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: 
      ......

 

Solution one:

Slave_SQL_Running: No
1. The program may have written on the slave

2. It may also be caused by transaction rollback after the slave machine is restarted.

Generally it is caused by transaction rollback:
Solution:
mysql> stop slave;
mysql> set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
mysql> start slave;

 

Solution two:

First stop the Slave service: slave stop
to the master server to view the host status:
record the values ​​corresponding to File and Position

Enter master

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

 

Then perform manual synchronization on the slave server:

mysql> change master to 
> master_host='master_ip',
> master_user='user', 
> master_password='pwd', 
> master_port=3306, 
> master_log_file='bin.000130', 
> master_log_pos=33622483 ;
1 row in set (0.00 sec)
mysql> start slave ;
1 row in set (0.00 sec)

May report an error:log_file 不存在，这是需要查看 从数据库服务器中mysql的 log文件目录下，master_log_file 是否存在？ 不存在时，直接从主数据服务器中复制过来即可；

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:

Note: It is best to lock the main table, manual synchronization can be correct

[Detailed explanation of pictures and texts] Reference: https://www.jianshu.com/p/f704af1deb5c