mysql 复制停止且无错误

Question

我在设置主从复制时遇到了这个问题。复制停止且没有错误，但是当我执行：slave stop;slave start;时，它又可以正常工作了。

mysql --version
mysql  Ver 14.14 Distrib 5.5.41, for debian-linux-gnu (x86_64) using 

readline 6.2

root@localhost:mysqld.sock:localhost/(none)> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 62.xx.222.99
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.002022
          Read_Master_Log_Pos: 59142342
               Relay_Log_File: mysqld-relay-bin.002651
                Relay_Log_Pos: 2192375
        Relay_Master_Log_File: mysql-bin.002022
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: edata
          Replicate_Ignore_DB: 
           Replicate_Do_Table: edata.c,edata.odetails,edata.e,edata.o,edata.mailing
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 59142342
              Relay_Log_Space: 10458329
              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: 0
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
1 row in set (0.00 sec)

通常复制工作正常，但有时它会停止并且我看不到任何错误。