MySQL更改relay-bin名称导致同步停止的解决办法

今天在优化io的时候，移动了从库relay-bin的位置，并将hostname部分去掉了，启动后，从库slave状态如下：

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: 127.0.0.1
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000226
          Read_Master_Log_Pos: 175251675
               Relay_Log_File: iZ23nn1p4mjZ-relay-bin.000464
                Relay_Log_Pos: 175251629
        Relay_Master_Log_File: mysql-bin.000226
             Slave_IO_Running: No
            Slave_SQL_Running: No
              Replicate_Do_DB: db_rsk,db_sys
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table: db_rsk.tb_act_unitequitiesposition,db_rsk.tb_act_productposition,db_rsk.tb_act_productunitasset,db_rsk.tb_act_productaccount,db_rsk.tb_act_unitaccount,db_rsk.tb_act_operationconfig,db_rsk.tb_rsk_assetvaluecompliance,db_rsk.tb_rsk_stockcostcompliance,db_rsk.tb_rsk_stockpoolcompliance,db_rsk.tb_rsk_stockquantitycompliance,db_rsk.tb_rsk_stockvaluecompalince,db_rsk.tb_rsk_tradelimitcompliance,db_rsk.tb_rsk_reversetradecompliance,db_rsk.tb_rsk_navcompliance,db_rsk.tb_rsk_rulescompliancecode,db_rsk.tb_rsk_usernavsection,db_rsk.tb_rsk_complianceset,db_rsk.tb_rsk_customdimensionstock,db_rsk.tb_rsk_customdimensiontype,db_rsk.tb_rsk_indexstock,db_rsk.tb_rsk_indextype,db_rsk.tb_rsk_industryclassification,db_rsk.tb_rsk_industrystock,db_rsk.tb_rsk_industrytype,db_rsk.tb_rsk_userdimensionstock,db_rsk.tb_rsk_userdimensiontype,db_rsk.tb_rsk_productmonitorset,db_rsk.tb_rsk_stockmonitorset,db_sys.tb_sys_bond_info,db_sys.tb_sys_code_map,db_sys.tb_sys_company,db_sys.tb_sys_dictionary,db_sys.tb_sys_exchange_info,db_sys.tb_sys_function_info,db_sys.tb_sys_menu,db_sys.tb_sys_menu_function,db_sys.tb_sys_operator,db_sys.tb_sys_operator_company,db_sys.tb_sys_operator_menu,db_sys.tb_sys_operator_parameter,db_sys.tb_sys_operator_role,db_sys.tb_sys_operator_unit,db_sys.tb_sys_order_direction,db_sys.tb_sys_parameter,db_sys.tb_sys_role,db_sys.tb_sys_role_menu,db_sys.tb_sys_stock_type,db_sys.tb_sys_system_info,db_sys.tb_sys_trade_date,db_sys.tb_sys_trade_time,db_sys.tb_sys_task_ex
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 1872
                   Last_Error: Slave failed to initialize relay log info structure from the repository
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 175251424
              Relay_Log_Space: 0
              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: 1872
               Last_SQL_Error: Slave failed to initialize relay log info structure from the repository
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 0
                  Master_UUID: 96b464e1-b68f-11e6-8321-00163f00368a
             Master_Info_File: /usr/local/Percona-Server-5.7.16-10-Linux.x86_64.ssl101/data2/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State:
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp: 170314 19:34:56
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set:
            Executed_Gtid_Set:
                Auto_Position: 0
         Replicate_Rewrite_DB: (db_act,db_rsk)
                 Channel_Name:
           Master_TLS_Version:
1 row in set (0.00 sec)

ERROR:
No query specified

使用start slave命令开启失败：

　　mysql> start slave；

　　ERROR 1872 (HY000)： Slave failed to initialize relay log info structure from the repository

　　使用reset slave命令解决：

　　mysql> reset slave；

　　Query OK， 0 rows affected (0.01 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: 127.0.0.1
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000223
          Read_Master_Log_Pos: 62998
               Relay_Log_File: relay-bin.000003
                Relay_Log_Pos: 11565
        Relay_Master_Log_File: mysql-bin.000223
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: db_rsk,db_sys
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table: db_rsk.tb_act_unitequitiesposition,db_rsk.tb_act_productposition,db_rsk.tb_act_productunitasset,db_rsk.tb_act_productaccount,db_rsk.tb_act_unitaccount,db_rsk.tb_act_operationconfig,db_rsk.tb_rsk_assetvaluecompliance,db_rsk.tb_rsk_stockcostcompliance,db_rsk.tb_rsk_stockpoolcompliance,db_rsk.tb_rsk_stockquantitycompliance,db_rsk.tb_rsk_stockvaluecompalince,db_rsk.tb_rsk_tradelimitcompliance,db_rsk.tb_rsk_reversetradecompliance,db_rsk.tb_rsk_navcompliance,db_rsk.tb_rsk_rulescompliancecode,db_rsk.tb_rsk_usernavsection,db_rsk.tb_rsk_complianceset,db_rsk.tb_rsk_customdimensionstock,db_rsk.tb_rsk_customdimensiontype,db_rsk.tb_rsk_indexstock,db_rsk.tb_rsk_indextype,db_rsk.tb_rsk_industryclassification,db_rsk.tb_rsk_industrystock,db_rsk.tb_rsk_industrytype,db_rsk.tb_rsk_userdimensionstock,db_rsk.tb_rsk_userdimensiontype,db_rsk.tb_rsk_productmonitorset,db_rsk.tb_rsk_stockmonitorset,db_sys.tb_sys_bond_info,db_sys.tb_sys_code_map,db_sys.tb_sys_company,db_sys.tb_sys_dictionary,db_sys.tb_sys_exchange_info,db_sys.tb_sys_function_info,db_sys.tb_sys_menu,db_sys.tb_sys_menu_function,db_sys.tb_sys_operator,db_sys.tb_sys_operator_company,db_sys.tb_sys_operator_menu,db_sys.tb_sys_operator_parameter,db_sys.tb_sys_operator_role,db_sys.tb_sys_operator_unit,db_sys.tb_sys_order_direction,db_sys.tb_sys_parameter,db_sys.tb_sys_role,db_sys.tb_sys_role_menu,db_sys.tb_sys_stock_type,db_sys.tb_sys_system_info,db_sys.tb_sys_trade_date,db_sys.tb_sys_trade_time,db_sys.tb_sys_task_ex
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 11360
              Relay_Log_Space: 63396
              Until_Condition: None
               Until_Log_File:
                Until_Log_Pos: 0