[MySQL] MySQL主从同步报错1236解决

àì夳堔傛蜴生んèń 2022-04-22 12:58 291阅读 0赞

记一次MySQL主从同步1236报错文件解决。

### 报错： ###

Slave同步失败报错1236，日志

mysql> show slave status \G
    *************************** 1. row ***************************
                   Slave_IO_State: 
                      Master_Host: 10.168.1.8
                      Master_User: replication
                      Master_Port: 3306
                    Connect_Retry: 30
                  Master_Log_File: mysql-bin.001359
              Read_Master_Log_Pos: 61919961
                   Relay_Log_File: mysql-relay-bin.003719
                    Relay_Log_Pos: 4
            Relay_Master_Log_File: mysql-bin.001359
                 Slave_IO_Running: No
                Slave_SQL_Running: No
                  Replicate_Do_DB: 
              Replicate_Ignore_DB: 
               Replicate_Do_Table: 
           Replicate_Ignore_Table: 
          Replicate_Wild_Do_Table: 
      Replicate_Wild_Ignore_Table: 
                       Last_Errno: 0
                       Last_Error: 
                     Skip_Counter: 0
              Exec_Master_Log_Pos: 61919961
                  Relay_Log_Space: 120
                  Until_Condition: None
                   Until_Log_File: 
                    Until_Log_Pos: 0
               Master_SSL_Allowed: No
               Master_SSL_CA_File: 
               Master_SSL_CA_Path: 
                  Master_SSL_Cert: 
                Master_SSL_Cipher: 
                   Master_SSL_Key: 
            Seconds_Behind_Master: NULL
    Master_SSL_Verify_Server_Cert: No
                    Last_IO_Errno: 1236
                    Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from position > file size; the first event 'mysql-bin.001359' at 61919961, the last event read from './mysql-bin.001359' at 4, the last byte read from './mysql-bin.001359' at 4.'
                   Last_SQL_Errno: 0
                   Last_SQL_Error: 
      Replicate_Ignore_Server_Ids: 
                 Master_Server_Id: 2
                      Master_UUID: 48a46c0c-eead-11e6-a73a-005056b6633d
                 Master_Info_File: /data/mysql/master.info
                        SQL_Delay: 0
              SQL_Remaining_Delay: NULL
          Slave_SQL_Running_State: 
               Master_Retry_Count: 86400
                      Master_Bind: 
          Last_IO_Error_Timestamp: 181105 08:26:10
         Last_SQL_Error_Timestamp: 
                   Master_SSL_Crl: 
               Master_SSL_Crlpath: 
               Retrieved_Gtid_Set: 
                Executed_Gtid_Set: 
                    Auto_Position: 0
    1 row in set (0.00 sec)
    
    mysql>

这种报错可能的原因是主库意外重启，意外发生前主库在一个binlog下面日志写入因为意外中断，待重新起来的时候会打开一个新的binlog从0开始写。但是这件事情Slave并不知道，它还在一直同步前一个binlog，直到pos位置id大于binlog文件位置上限触发告警。

### 解决： ###

登录到Master主机，执行命令查看对应的报错日志的结束位置

[root@mysqlmaster2 mysql]# mysqlbinlog --no-defaults mysql-bin.001359 >> /tmp/123.log
    [root@mysqlmaster2 mysql]# vi /tmp/123.log 
    [root@mysqlmaster2 mysql]# tail -f /tmp/123.log 
    insert into tb_o2n2 (device_o2_id,type,value,rectime)values(1,"N2",0,"2018-11-05 00:15:31.550817")
    /*!*/;
    # at 61918946
    #181105  0:15:36 server id 2  end_log_pos 61918977 CRC32 0xc9906a5c 	Xid = 157867719
    COMMIT/*!*/;
    DELIMITER ;
    # End of log file
    ROLLBACK /* added by mysqlbinlog */;
    /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
    /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;

发现end\_log\_pos的值为61918977，比报错日志的位置值61919961要小，直接从这个位置开始重新配置主从：

去Slave上执行

mysql> stop slave;
    Query OK, 0 rows affected (0.03 sec)
    
    mysql> CHANGE MASTER TO
        -> MASTER_HOST="192.168.1.8",
        -> MASTER_USER="replication",
        -> MASTER_PASSWORD="******",
        -> MASTER_LOG_FILE="mysql-bin.001359",
        -> MASTER_LOG_POS=61918977;
    Query OK, 0 rows affected, 2 warnings (0.16 sec)
    
    mysql> start slave;
    Query OK, 0 rows affected (0.01 sec)
    
    mysql>

主从同步状态恢复成功

mysql> show slave status \G
    *************************** 1. row ***************************
                   Slave_IO_State: Waiting for master to send event
                      Master_Host: 192.168.1.8
                      Master_User: replication
                      Master_Port: 3306
                    Connect_Retry: 30
                  Master_Log_File: mysql-bin.001360
              Read_Master_Log_Pos: 32879427
                   Relay_Log_File: mysql-relay-bin.000003
                    Relay_Log_Pos: 1526424
            Relay_Master_Log_File: mysql-bin.001360
                 Slave_IO_Running: Yes
                Slave_SQL_Running: Yes
                  Replicate_Do_DB: 
              Replicate_Ignore_DB: 
               Replicate_Do_Table: 
           Replicate_Ignore_Table: 
          Replicate_Wild_Do_Table: 
      Replicate_Wild_Ignore_Table: 
                       Last_Errno: 0
                       Last_Error: 
                     Skip_Counter: 0
              Exec_Master_Log_Pos: 1526261
                  Relay_Log_Space: 32879926
                  Until_Condition: None
                   Until_Log_File: 
                    Until_Log_Pos: 0
               Master_SSL_Allowed: No
               Master_SSL_CA_File: 
               Master_SSL_CA_Path: 
                  Master_SSL_Cert: 
                Master_SSL_Cipher: 
                   Master_SSL_Key: 
            Seconds_Behind_Master: 2849
    Master_SSL_Verify_Server_Cert: No
                    Last_IO_Errno: 0
                    Last_IO_Error: 
                   Last_SQL_Errno: 0
                   Last_SQL_Error: 
      Replicate_Ignore_Server_Ids: 
                 Master_Server_Id: 2
                      Master_UUID: 48a46c0c-eead-11e6-a73a-005056b6633d
                 Master_Info_File: /data/mysql/master.info
                        SQL_Delay: 0
              SQL_Remaining_Delay: NULL
          Slave_SQL_Running_State: System lock
               Master_Retry_Count: 86400
                      Master_Bind: 
          Last_IO_Error_Timestamp: 
         Last_SQL_Error_Timestamp: 
                   Master_SSL_Crl: 
               Master_SSL_Crlpath: 
               Retrieved_Gtid_Set: 
                Executed_Gtid_Set: 
                    Auto_Position: 0
    1 row in set (0.00 sec)
    
    mysql>