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据我所知，我已经毫无问题地安装了 MySQL Connector/Python (v1.2.3) 模块。这是在 CentOS 5.4 上使用 Python 2.7.7（Anaconda 发行版，尽管在 vanilla 安装上也是如此）。我能够导入它并初始化与 MySQL 服务器（v4.1.20）的连接。该服务器通过 LAN 访问，而不是本地访问。该is_connected()方法断言我已正确连接

>>> import mysql.connector 
>>> cnx = mysql.connector.connect(<MySQL database information here>) 
>>> cursor = cnx.cursor()
>>> cnx.is_connected() 
True

但是，每当我尝试直接通过游标命令（例如cursor.execute("SELECT DATABASE();")）或间接通过 mysql.connector 方法（例如，get_database()）执行任何 SQL 查询时，我都会收到相同的错误，如下所示：

>>> cnx.get_database() 
Traceback (most recent call last): 
File "<stdin>", line 1, in <module> 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 1200, in get_database 
return self._info_query("SELECT DATABASE()")[0] 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 1434, in _info_query 
cursor.execute(query) 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/cursor.py", line 494, in execute 
self._handle_result(self._connection.cmd_query(stmt)) 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 683, in cmd_query 
statement)) 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 612, in _handle_result 
eof = self._handle_eof(self._socket.recv()) 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 554, in _handle_eof 
eof = self._protocol.parse_eof(packet) 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/protocol.py", line 252, in parse_eof 
raise errors.InterfaceError(err_msg) 
mysql.connector.errors.InterfaceError: Failed parsing EOF packet.

在此之后，似乎与 MySQL 服务器的连接丢失了。再次尝试运行get_database()返回以下错误：

>>> cnx.get_database() 
Traceback (most recent call last): 
File "<stdin>", line 1, in <module> 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 1200, in get_database 
return self._info_query("SELECT DATABASE()")[0] 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 1433, in _info_query 
cursor = self.cursor(buffered=True) 
File "/home/bgrande/software/genesis/anaconda-2.0.1/lib/python2.7/site-packages/mysql/connector/connection.py", line 1328, in cursor 
raise errors.OperationalError("MySQL Connection not available.") 
mysql.connector.errors.OperationalError: MySQL Connection not available.

该方法证实了这一点is_connected()。

>>> cnx.is_connected() 
False

此外，我应该提到，在这个 LAN 上另一台具有类似设置的计算机上（CentOS 5.5；Python 2.7.6），我已经成功地使用 MySQLdb 模块与数据库进行交互。然而，与 mysql.connector 模块相同的 Python 安装不能（由于相同的错误）。我尝试在此处提到的第一台计算机上安装 MySQLdb，但遇到了问题。我认为 MySQL 连接器/Python 会更容易工作。

恐怕这很难重现，因为它可能取决于我的特定环境。尽管如此，对于我可以采取哪些步骤来缩小问题所在的范围，我将不胜感激。谢谢！

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