Errno 10054 An existing connection was forcibly closed by the remote host. - How to debug?

Question

I'm using Google App Engine for the first time and I'm sort of confused about this error, I can't understand how to debug this any further.

I created an application under my account, then I'm trying to upload a python file into it via Google App Engine Launcher. But I keeping getting this error.

08:39 PM Host: appengine.google.com
08:39 PM Application: gappproxytestapp; version: 1
08:39 PM 
Starting update of app: gappproxytestapp, version: 1
08:39 PM Getting current resource limits.
2012-11-13 20:40:32,505 ERROR appcfg.py:2202 An error occurred processing file '': <urlopen error [Errno 10054] An existing connection was forcibly closed by the remote host>. Aborting. 
Traceback (most recent call last):
  File "C:\Program Files (x86)\Google\google_appengine\appcfg.py", line 171, in <module>
    run_file(__file__, globals())
  File "C:\Program Files (x86)\Google\google_appengine\appcfg.py", line 167, in run_file
    execfile(script_path, globals_)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 4322, in <module>
    main(sys.argv)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 4313, in main
    result = AppCfgApp(argv).Run()
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 2599, in Run
    self.action(self)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 4048, in __call__
    return method()
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 3065, in Update
    self.UpdateVersion(rpcserver, self.basepath, appyaml)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 3047, in UpdateVersion
    lambda path: self.opener(os.path.join(basepath, path), 'rb'))
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 2172, in DoUpload
    self.resource_limits = GetResourceLimits(self.rpcserver, self.config)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 357, in GetResourceLimits
    resource_limits.update(GetRemoteResourceLimits(rpcserver, config))
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appcfg.py", line 328, in GetRemoteResourceLimits
    version=config.version)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appengine_rpc.py", line 389, in Send
    f = self.opener.open(req)
  File "C:\Python27\lib\urllib2.py", line 400, in open
    response = self._open(req, data)
  File "C:\Python27\lib\urllib2.py", line 418, in _open
    '_open', req)
  File "C:\Python27\lib\urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "C:\Python27\lib\urllib2.py", line 1215, in https_open
    **return self.do_open(httplib.HTTPSConnection, req)
  File "C:\Program Files (x86)\Google\google_appengine\lib\fancy_urllib\fancy_urllib\__init__.py", line 383, in do_open
    raise url_error
urllib2.URLError: <urlopen error [Errno 10054] An existing connection was forcibly closed by the remote host>
2012-11-13 20:40:32 (Process exited with code 1)**

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How do I debug this further? Seems like urllib2 is having problems with HTTPS. But that's strange because I'm not behind any local proxy and I've never had any other HTTPS problems.

Answer 1

I faced the same issue. I closed the Google App Engine Launcher and started it again, and attempted uploading the app, it worked.