Client requested master to start replication from impossible position; the last event was read from

一：问题描述

由于10.0.3.96此虚拟机所在的物理机存储不够了，所以上面的数据库也无法访问了。
后来10.0.3.96可以正常访问后，其从库10.0.3.97却发生了异常：

    mysql> show slave status G;
    *************************** 1. row ***************************
                   Slave_IO_State:
                      Master_Host: 10.0.3.96
                      Master_User: admin
                      Master_Port: 3306
                    Connect_Retry: 60
                  Master_Log_File: mysql-bin.000417
              Read_Master_Log_Pos: 228308262
                   Relay_Log_File: vhost_eip_26-relay-bin.001024
                    Relay_Log_Pos: 228308408
            Relay_Master_Log_File: mysql-bin.000417
                 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: 0
                       Last_Error:
                     Skip_Counter: 0
              Exec_Master_Log_Pos: 228308262
                  Relay_Log_Space: 228308614
                  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: 'Client requested master to start replication from impossible position; the last event was read from './mysql-bin.000417' at 228308262, the last byte read was read from './mysql-bin.000417' at 4.'
                   Last_SQL_Errno: 0
                   Last_SQL_Error:
      Replicate_Ignore_Server_Ids:
                 Master_Server_Id: 1
    1 row in set (0.01 sec)
     
     
    ERROR:
    No query specified

经查看，该binlog文件最后一个position是228287326，没有228308262这个位置：

# at 228287326
#170223  3:25:08 server id 1  end_log_pos 228287353     Xid = 1951871937
COMMIT/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;


二：解决办法

从下一个文件mysql-bin.000418的起始位置开始复制。

    mysql> stop slave;
    Query OK, 0 rows affected (0.00 sec)
     
    mysql> CHANGE MASTER TO MASTER_HOST ='10.0.3.96',MASTER_LOG_FILE ='mysql-bin.000418',MASTER_LOG_POS = 4;
    Query OK, 0 rows affected (0.25 sec)
     
    mysql> start slave;
    Query OK, 0 rows affected (0.00 sec)
     
    mysql> show slave status G;
    *************************** 1. row ***************************
                   Slave_IO_State: Waiting for master to send event
                      Master_Host: 10.0.3.96
                      Master_User: admin
                      Master_Port: 3306
                    Connect_Retry: 60
                  Master_Log_File: mysql-bin.000418
              Read_Master_Log_Pos: 107
                   Relay_Log_File: vhost_eip_26-relay-bin.000002
                    Relay_Log_Pos: 253
            Relay_Master_Log_File: mysql-bin.000418
                 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: 0
                       Last_Error:
                     Skip_Counter: 0
              Exec_Master_Log_Pos: 107
                  Relay_Log_Space: 416
                  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: 1
    1 row in set (0.00 sec)
     
     
    ERROR:
    No query specified
---------------------
作者：雅冰石
来源：CSDN
原文：https://blog.csdn.net/yabingshi_tech/article/details/56841704
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