mysql5.6.23開啟並行復制時的冷遷移問題

本文章為各位介紹關於mysql5.6.23開啟並行復制時的冷遷移問題,大家一起來看看關於mysql5.6.23開啟並行復制時的冷遷移的一些常見問題吧.

5.6.23在開啟並行復制的時候，進行冷遷移後，start slave報錯，set global slave_parallel_workers =0後可正常進行復制。 說明：已有從庫並行復制配置：slave_parallel_workers = 4；通過停庫拷貝datadir目錄到目標機器，實現冷遷移，完成後目錄機器start slave時報如下錯誤。
具體的報錯信息
              Master_Log_File: mysql-bin.000283
          Read_Master_Log_Pos: 715296037
               Relay_Log_File: relay-log.000294
                Relay_Log_Pos: 245347818
        Relay_Master_Log_File: mysql-bin.000283
             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: mysql.%,test.%
                   Last_Errno: 1755
                   Last_Error: Cannot execute the current event group in the parallel mode. Encountered event Stop, relay-log name ./relay-log.000294, position 245347905 which prevents execution of this event group in parallel mode. Reason: possible malformed group of events from an old master.
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 245347659
              Relay_Log_Space: 715297197
              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: 0
                Last_IO_Error:
               Last_SQL_Errno: 1755
               Last_SQL_Error: Cannot execute the current event group in the parallel mode. Encountered event Stop, relay-log name ./relay-log.000294, position 245347905 which prevents execution of this event group in parallel mode. Reason: possible malformed group of events from an old master.
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 2331597761
                  Master_UUID: 75f94423-e1c1-11e5-8da4-70e2840af125
             Master_Info_File: /ssd/mysql/mysql_48284/var/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State:
              Semi_Sync_Group:
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp: 160311 15:54:17
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set:
            Executed_Gtid_Set:
                Auto_Position: 0
如上報錯後，可stop slave後，將slave_parallel_workers設置為0，關閉並行復制,然後再start slave後，重新開啟並行復制就沒有問題。