mysql主从复制1236错误

今天监控显示mysql主从复制出错了，信息如下：

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: 192.168.33.230
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.000774
          Read_Master_Log_Pos: 202924128
               Relay_Log_File: 192-168-33-236-relay-bin.000065
                Relay_Log_Pos: 202924292
        Relay_Master_Log_File: master-bin.000774
             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: 202924128
              Relay_Log_Space: 202924521
              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.000774‘ at 202924128, the last event read from ‘./master-bin.000774‘ at 4, the last byte read from ‘./master-bin.000774‘ 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/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: 170817 15:37:11
     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)

ERROR:
No query specified

在mysql.cnf里面有一句跳过经常出现的错误，但是还是报了1236错误

slave-skip-errors = 1062,1091,1396,1050,1060,1054,1146,1236

尝试stop slave ； start slave 还是没有恢复

然后就照着上面的错误提示更新pos点

mysql> stop slave;
Query OK, 0 rows affected (0.01 sec)

mysql> change master to master_log_file=‘master-bin.000774‘, master_log_pos=4;
Query OK, 0 rows affected (0.12 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

然后查看状态就恢复正常了，具体原因再慢慢分析,,,,,,,

有时候还会报下面这个信息

              Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: ‘could not find next log; the first event ‘mysql-bin.001891‘ at 897184977, the last event read from ‘./mysql-bin.001891‘ at 1109808979, the last byte read from ‘./mysql-bin.001891‘ at 1109808979.‘

上面这个错误尝试stop slave ； start slave 就恢复了