MySQL报错 Error_code: 1045

今天把两台机器恢复主从关系后，在slave上执行show slave status，结果中显示

 2017-04-21T13:46:15.133435Z 8806 [ERROR] Slave I/O for channel '': error connecting to master '[email protected]:3306' - retry-time: 60 retries: 1, Error_code: 1045

首先查看slave的错误日志文件，和上面的错误一样

接着用perror查看上一部获得的错误代码：

 [root@iZ2ze5ifr62amhrpcnpn9yZ mysql]# perror 1045
 MySQL error code 1045 (ER_ACCESS_DENIED_ERROR): Access denied for user '%-.48s'@'%-.64s' (using password: %s)

有可能是复制用的账户存在问题，先在MASTER上确认复制用户账户是否存在且是否赋了正确的权限

 mysql> show grants for repl@192.168.2.41;
 +---------------------------------------------------------+
 | Grants for repl@192.168.2.41 |
 +---------------------------------------------------------+
 | GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.2.41' |
 +---------------------------------------------------------+
 1 row in set (0.00 sec)

发现没有问题，试着从master使用该账户连接至slave，果然没连上

 [root@iZ2ze5ifr62amhrpcnpn9yZ ~]# mysql -urepl -h 192.168.2.40 -p -P3306
 Enter password:
 ERROR 1045 (28000): Access denied for user 'repl'@'192.168.2.40' (using password: YES)

之前的密码可能不对， 修改一个新的密码

 mysql> update mysql.user set authentication_string=PASSWORD('REPLsafe!@#$41') where User='repl' and host='192.168.2.41';
 Query OK, 1 row affected, 1 warning (0.00 sec)
 Rows matched: 1 Changed: 1 Warnings: 1

 mysql> commit;
 Query OK, 0 rows affected (0.00 sec)

 mysql> flush privileges;
 Query OK, 0 rows affected (0.00 sec)

试着用新的密码重建复制关系，问题解决。

 mysql> stop slave;
 Query OK, 0 rows affected (0.01 sec)

 mysql> change master to
     -> master_host='192.168.2.40',
     -> master_port=3306,
     -> master_user='repl',
     -> master_password='REPLsafe!@#$41',
     -> master_log_file='bin.000043',
     -> master_log_pos=799072709;
 Query OK, 0 rows affected, 2 warnings (0.05 sec)

 mysql> start slave;
 Query OK, 0 rows affected (0.01 sec)

 mysql> show slave status \G;
 *************************** 1. row ***************************
                Slave_IO_State: Waiting for master to send event
                   Master_Host: 192.168.2.40
                   Master_User: repl
                   Master_Port: 3306
                 Connect_Retry: 60
               Master_Log_File: bin.000043
           Read_Master_Log_Pos: 854716379
                Relay_Log_File: relay.000002
                 Relay_Log_Pos: 1135224
         Relay_Master_Log_File: bin.000043
              Slave_IO_Running: Yes
             Slave_SQL_Running: Yes
               Replicate_Do_DB:
           Replicate_Ignore_DB: cus_DEMO,cus_DEMO_0413,cus_DEMO_0414,cus_DEMO_0418
            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: 800207619
               Relay_Log_Space: 55644221
               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: 18559
 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: 40
                   Master_UUID: 1b00b716-cf6a-11e6-b66e-00163e320583
              Master_Info_File: mysql.slave_master_info
                     SQL_Delay: 0
           SQL_Remaining_Delay: NULL
       Slave_SQL_Running_State: System lock
            Master_Retry_Count: 86400
                   Master_Bind:
       Last_IO_Error_Timestamp:
      Last_SQL_Error_Timestamp:
                Master_SSL_Crl:
            Master_SSL_Crlpath:
            Retrieved_Gtid_Set: 1b00b716-cf6a-11e6-b66e-00163e320583:34573831-34680957
             Executed_Gtid_Set: 1b00b716-cf6a-11e6-b66e-00163e320583:1-33612321:34573831-34620341
                 Auto_Position: 0
          Replicate_Rewrite_DB:
                  Channel_Name:
            Master_TLS_Version:
 1 row in set (0.00 sec)

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