无法从从站连接到主站，错误为“连接到主站时出错 (1045)”

Question

我尝试设置从从服务器到主服务器的复制。

CHANGE MASTER TO
  MASTER_HOST = 'master',
  MASTER_PORT = 3306,
  MASTER_USER = 'repl',
  MASTER_PASSWORD = 'xxx';

而且我确实向 master 上的用户授予了权限。我可以用mysql命令从slave机器连接到master

mysql -h master -u repl -p
mysql> show grants;
GRANT RELOAD, SUPER, REPLICATION SLAVE, CREATE USER ON *.* TO 'repl'@'xxx' IDENTIFIED BY PASSWORD 'xxx'

mysql> select 1;
+---+
| 1 |
+---+
| 1 |
+---+
1 row in set (0.04 sec)

如您所见，权限正确，连接正常，但是复制到 master 的连接总是失败。

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Connecting to master
                  Master_Host: master
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File:
          Read_Master_Log_Pos: 4
               Relay_Log_File: slave-replay-bin.000002
                Relay_Log_Pos: 4
        Relay_Master_Log_File:
             Slave_IO_Running: Connecting
            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: 0
              Relay_Log_Space: 107
              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: 1045
                Last_IO_Error: error connecting to master 'repl@master:3306' - retry-time: 60  retries: 86400
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 0
1 row in set (0.00 sec)

这是由不同版本的 MySQL 服务器引起的吗？master的版本是5.0.77，slave是5.5.13。但是我能找到的所有文章都告诉我，从新的奴隶复制到旧的主人是可以的。如何解决这个问题呢？

- 更新 -

我什至尝试升级旧的 MySQL，但仍然没有解决问题。

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Connecting to master
                  Master_Host: master
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.000007
          Read_Master_Log_Pos: 107
               Relay_Log_File: slave-replay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: master-bin.000007
             Slave_IO_Running: Connecting
            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: 107
              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: 1045
                Last_IO_Error: error connecting to master 'repl@master' - retry-time: 60  retries: 86400
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 0
1 row in set (0.00 sec)

Answer 1

终于，我找到了原因。密码太长。我尝试使用短密码，它有效。如果密码太长，我认为 mysql 命令可能会截断密码，但似乎复制并没有为您做到这一点。