pymssql连接数据报"Connection to the database failed for an unknown reason"

Python脚本采集某一台SQL Server服务器数据的时候，突然遇到“Connection to the database failed for an unknown reason”错误，更详细的信息如下

 

Traceback (most recent call last):

  File "src/pymssql.pyx", line 636, in pymssql.connect

  File "src/_mssql.pyx", line 1957, in _mssql.connect

  File "src/_mssql.pyx", line 677, in _mssql.MSSQLConnection.__init__

_mssql.MSSQLDriverException: Connection to the database failed for an unknown reason.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "/home/konglb/python/get_server_info.py", line 84, in <module>

    autocommit=True);

  File "src/pymssql.pyx", line 645, in pymssql.connect

pymssql.InterfaceError: Connection to the database failed for an unknown reason.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "/home/konglb/python/get_server_info.py", line 474, in <module>

    logger.error(fe.message)

AttributeError: 'InterfaceError' object has no attribute 'message'

 

 

后面经过仔细的对比检查、验证测试，终于发现这台机器的IP地址后面有空格（一个表存储这些信息服务器信息，但是最近这个新增的记录在INSERT的时候，SERVER_IP字段多了一个空格），直接导致Python脚本使用pymssql连接数据库的时候遇到这个错误。后面我实验验证了一把，只要pymssql.connect的host字段的变量如果有空格，就会报这个错误。特此记录一下这个比较特殊的错误！

 

...................................................

for row in rows:

    try:

        src_db_conn = pymssql.connect(

                                      host=row['SERVER_IP'],

                                      user=row['USER_NAME'],

                                      password=row['PASSWORD'],

                                      database='master',

                                      charset="utf8",

                                      autocommit=True

                                      );

        sub_cursor =src_db_conn.cursor(as_dict=True)

     ................................................

来源：oschina

链接：https://my.oschina.net/u/4399604/blog/4523352