困惑解決msyql主從同步問題

目前從庫不一樣步，

查看狀態：

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: xxxx

                  Master_User: xxx
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: xxx-bin.000001
          Read_Master_Log_Pos: 1440046
               Relay_Log_File: host-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File:xxx-bin.000001
             Slave_IO_Running: No
            Slave_SQL_Running: Yes
              Replicate_Do_DB: xxx
          Replicate_Ignore_DB: mysql
           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: 1440046
              Relay_Log_Space: 106
              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: 'Could not find first log file name in binary log index file'
               Last_SQL_Errno: 0
               Last_SQL_Error:
1 row in set (0.00 sec)

 

從服務器大量錯誤日誌：

101027 16:50:58 [Note] Slave I/O thread: connected to master 'xxx@xxxxxx:3306',replication started in log 'xxx-bin.000001' at position 1440046
101027 16:50:58 [ERROR] Error reading packet from server: Could not find first log file name in binary log index file ( server_errno=1236)
101027 16:50:58 [ERROR] Slave I/O: Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in binary log index file', Error_code: 1236
101027 16:50:58 [Note] Slave I/O thread exiting, read up to log 'xxx-bin.000001', position 1440046

主狀態：

 

mysql> show master status\G
*************************** 1. row ***************************
            File: mysql-bin.000001
        Position: 1440046
    Binlog_Do_DB:
Binlog_Ignore_DB:
1 row in set (0.00 sec)

 

按照正常流程解決，應該是：

slave stop;
CHANGE MASTER TO MASTER_HOST='xxx',MASTER_USER='xx',MASTER_PASSWORD='xx',MASTER_PORT=3306,MASTER_LOG_FILE='xxx-bin.000001',MASTER_LOG_POS=1440046;

slave start;

 

問題依然存在，

 

後來通過如下步驟解決，不過有點困惑：

一、重啓主庫

二、給從庫從新受權

三、執行如下命令

slave stop; reset slave; slave start;