MySQL主从失败报错误： Got fatal error 1236

最新推荐文章于 2024-09-02 09:52:11 发布

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原文链接：http://www.cnblogs.com/cyleon/p/10101787.html

文章标签：

#数据库 #开发工具

本文详细介绍了当MySQL主库意外重启导致从库同步失败时的解决步骤。通过定位错误信息，解析binlog日志，重新指定同步位置，成功恢复了主从同步状态。

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一、问题原因及报错误信息

由于MySQL主库意外重启，导致从库无法同步报错如下：

登录从库查看主从同步的错误信息

[root@192-168-7-101 mysql]# vim mysqld-error.log 
2018-12-11 12:57:35 1788 [ERROR] Error reading packet from server: Client requested master to start replication from position > file size; the first event 'master-bin.002295' at 1021866995, the last event read from './master-bin.002295' at 4, the last byte read from './master-bin.002295' at 4. (server_errno=1236)
2018-12-11 12:57:35 1788 [ERROR] Slave I/O: 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 'master-bin.002295' at 1021866995, the last event read from './master-bin.002295' at 4, the last byte read from './master-bin.002295' at 4.', Error_code: 1236

[root@192-168-7-101 mysql]# mysql -u root -p
mysql> show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 192.168.3.230
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.002295
          Read_Master_Log_Pos: 1021866995
               Relay_Log_File: 192-168-3-236-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: master-bin.002295
             Slave_IO_Running: No
            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: 1021866995
              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 'master-bin.002295' at 1021866995, the last event read from './master-bin.002295' at 4, the last byte read from './master-bin.002295' at 4.'
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 1
                  Master_UUID: f7c24af7-a54a-11e6-88b4-525400169c04
             Master_Info_File: /Data/work/local/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 181211 12:57:35
     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)

二、解决方法

1. 先登录到MySQL主库，搜索后并未找到position的位置

[root@192-168-7-100 mysql]# mysqlbinlog  --no-defaults --start-position=1021866995 master-bin.002295   
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#181210 22:41:27 server id 1  end_log_pos 120 CRC32 0x1fe77f51     Start: binlog v 4, server v 5.6.30-log created 181210 22:41:27
BINLOG '
F3sOXA8BAAAAdAAAAHgAAAAAAAQANS42LjMwLWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAXAAEGggAAAAICAgCAAAACgoKGRkAAVF/
5x8=
'/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;

2. 解析binlog日志文件，找到离1021866995最近的position最近的位置102186424

[root@192-168-7-100 mysql]# mysqlbinlog  --no-defaults  master-bin.002295 >/root/test.sql
[root@192-168-7-100 mysql]# vim /root/test.sql
# at 102186284
#181211  0:05:07 server id 1  end_log_pos 102186315 CRC32 0xd5613884    Xid = 1912388
COMMIT/*!*/;
# at 102186315
#181211  0:05:07 server id 1  end_log_pos 102186392 CRC32 0x2b89095e    Query   thread_id=13545 exec_time=1     error_code=0
SET TIMESTAMP=1544457907/*!*/;
BEGIN
/*!*/;
# at 102186392
# at 102186424


3.登录从库，重新指定主从的同步位置
[root@192-168-7-101 mysql]# mysql -u root -p
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> change master to master_log_file='master-bin.002295',master_log_pos=102186424;
Query OK, 0 rows affected (0.16 sec)

mysql> start slave;
Query OK, 0 rows affected (0.03 sec)

mysql> show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: Queueing master event to the relay log
                  Master_Host: 192.168.3.230
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.002295
          Read_Master_Log_Pos: 155577520
               Relay_Log_File: 192-168-7.100-relay-bin.000002
                Relay_Log_Pos: 498191
        Relay_Master_Log_File: master-bin.002295
             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: 102684331
              Relay_Log_Space: 53391561
              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: 46929
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: 1
                  Master_UUID: f7c24af7-a54a-11e6-88b4-525400169c04
             Master_Info_File: /Data/work/local/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: updating
           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)