对于我在Ubuntu系统上新安装的MongoDB，我也安装了MMS-Agent，但运行几分钟后会出现以下消息。
有什么问题？
xx@ubuntu12Dev:~/mms-agent$ python agent.py
2012-05-29 22:54:22,319 INFO Starting agent parent process - version: 1.4.1
2012-05-29 22:54:22,320 INFO Started agent parent process - version: 1.4.1
2012-05-29 22:54:27,409 INFO Starting agent process - version 1.4.1
2012-05-29 22:54:27,414 INFO Started agent process - parent pid: 2877 - version: 1.4.1
2012-05-29 22:56:31,391 INFO starting non-blocking stats monitoring: ubuntu12Dev:27017
2012-05-29 22:56:31,393 INFO starting blocking stats monitoring: ubuntu12Dev:27017
2012-05-29 22:56:31,393 INFO starting munin monitoring: ubuntu12Dev:4949
2012-05-29 23:04:37,040 ERROR Problem with upgrade check: Traceback (most recent call last):
File "agent.py", line 190, in run
res = urllib2.urlopen( self.settings.version_url % { 'key' : self.settings.mms_key } )
File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 400, in open
response = self._open(req, data)
File "/usr/lib/python2.7/urllib2.py", line 418, in _open
'_open', req)
File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 1215, in https_open
return self.do_open(httplib.HTTPSConnection, req)
File "/usr/lib/python2.7/urllib2.py", line 1177, in do_open
raise URLError(err)
URLError: