mysql从库Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in binary log index file'报错处理

年后回来查看mysql运行状况与备份情况，登录mysql从库查看主从同步状态

 mysql> show slave status\G;
 *************************** . row ***************************
                Slave_IO_State:
                   Master_Host: 101.200.*.*
                   Master_User: backup
                   Master_Port:
                 Connect_Retry:
               Master_Log_File: master-bin.
           Read_Master_Log_Pos:
                Relay_Log_File: mysql-relay.
                 Relay_Log_Pos:
         Relay_Master_Log_File: master-bin.
              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:
                    Last_Error:
                  Skip_Counter:
           Exec_Master_Log_Pos:
               Relay_Log_Space:
               Until_Condition: None
                Until_Log_File:
                 Until_Log_Pos:
            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:
                 Last_IO_Error: Got fatal error  from master when reading data from binary log: 'Could not find first log file name in binary log index file'
                Last_SQL_Errno:
                Last_SQL_Error:
   Replicate_Ignore_Server_Ids:
              Master_Server_Id:
                   Master_UUID: e4a43da7-5b58-11e5-a12f-00163e003632
              Master_Info_File: /home/data/mysql/master.info
                     SQL_Delay:
           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:
                   Master_Bind:
       Last_IO_Error_Timestamp:  ::
      Last_SQL_Error_Timestamp:
                Master_SSL_Crl:
            Master_SSL_Crlpath:
            Retrieved_Gtid_Set:
             Executed_Gtid_Set:
                 Auto_Position:
  row in set (0.00 sec)

 ERROR:
 No query specified

突然之间Slave_IO_Running: 状态变成NO了

解决方法。

首先在从库上执行

stop slave;

查看主库master状态

 mysql> show master status\G;
 *************************** . row ***************************
              File: mysql-bin.
          Position:
      Binlog_Do_DB:
  Binlog_Ignore_DB:
 Executed_Gtid_Set:
  row in set (0.00 sec)

 ERROR:
 No query specified

 mysql> flush logs;
 Query OK,  rows affected (0.11 sec)

刷新binlog日志

flush logs;

刷新后的日志会+1

例如上面的 File: mysql-bin.000113 会变成 File: mysql-bin.000114

再次查看master状态

 mysql> show master status\G;
 *************************** . row ***************************
              File: mysql-bin.
          Position:
      Binlog_Do_DB:
  Binlog_Ignore_DB:
 Executed_Gtid_Set:
  row in set (0.00 sec)

 ERROR:
 No query specified

然后就不需要在操作master，切换到从库

输入CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000114',MASTER_LOG_POS=120;

执行start slave;

查看从库状态

 mysql> show slave status\G;
 *************************** . row ***************************
                Slave_IO_State: Waiting for master to send event
                   Master_Host: 101.200.*.*
                   Master_User: backup
                   Master_Port:
                 Connect_Retry:
               Master_Log_File: mysql-bin.
           Read_Master_Log_Pos:
                Relay_Log_File: mysql-relay.
                 Relay_Log_Pos:
         Relay_Master_Log_File: mysql-bin.
              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:
                    Last_Error:
                  Skip_Counter:
           Exec_Master_Log_Pos:
               Relay_Log_Space:
               Until_Condition: None
                Until_Log_File:
                 Until_Log_Pos:
            Master_SSL_Allowed: No
            Master_SSL_CA_File:
            Master_SSL_CA_Path:
               Master_SSL_Cert:
             Master_SSL_Cipher:
                Master_SSL_Key:
         Seconds_Behind_Master:
 Master_SSL_Verify_Server_Cert: No
                 Last_IO_Errno:
                 Last_IO_Error:
                Last_SQL_Errno:
                Last_SQL_Error:
   Replicate_Ignore_Server_Ids:
              Master_Server_Id:
                   Master_UUID: e4a43da7-5b58-11e5-a12f-00163e003632
              Master_Info_File: /home/data/mysql/master.info
                     SQL_Delay:
           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:
                   Master_Bind:
       Last_IO_Error_Timestamp:
      Last_SQL_Error_Timestamp:
                Master_SSL_Crl:
            Master_SSL_Crlpath:
            Retrieved_Gtid_Set:
             Executed_Gtid_Set:
                 Auto_Position:
  row in set (0.00 sec)

 ERROR:
 No query specified