Google app engine HTTPError:HTTP错误502:代理错误（连接被拒绝）

在本地运行devserver时，我在Google app engine上不断收到连接代理错误502（连接被拒绝）。代理是通过localserver传递的，但仍然拒绝连接

以下是我得到的：

HTTPError()
HTTPError()
Traceback (most recent call last):
  File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 1302, in communicate
    req.respond()
  File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 831, in respond
    self.server.gateway(self).respond()
  File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 2115, in respond
    response = self.req.server.wsgi_app(self.env, self.start_response)
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/wsgi_server.py", line 250, in __call__
    return app(environ, start_response)
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/request_rewriter.py", line 311, in _rewriter_middleware
    response_body = iter(application(environ, wrapped_start_response))
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/python/request_handler.py", line 89, in __call__
    self._flush_logs(response.get('logs', []))
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/python/request_handler.py", line 225, in _flush_logs
    apiproxy_stub_map.MakeSyncCall('logservice', 'Flush', request, response)
  File "/home/arslan/GAE/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 94, in MakeSyncCall
    return stubmap.MakeSyncCall(service, call, request, response)
  File "/home/arslan/GAE/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 328, in MakeSyncCall
    rpc.CheckSuccess()
  File "/home/arslan/GAE/google_appengine/google/appengine/api/apiproxy_rpc.py", line 156, in _WaitImpl
    self.request, self.response)
  File "/home/arslan/GAE/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 200, in MakeSyncCall
    self._MakeRealSyncCall(service, call, request, response)
  File "/home/arslan/GAE/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 226, in _MakeRealSyncCall
    encoded_response = self._server.Send(self._path, encoded_request)
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/appengine_rpc.py", line 393, in Send
    f = self.opener.open(req)
  File "/usr/lib/python2.7/urllib2.py", line 406, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 519, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 444, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 527, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 502: Proxy Error ( Connection refused )
Traceback (most recent call last):
  File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 1302, in communicate
    req.respond()
  File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 831, in respond
    self.server.gateway(self).respond()
  File "/home/arslan/GAE/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 2115, in respond
    response = self.req.server.wsgi_app(self.env, self.start_response)
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/wsgi_server.py", line 250, in __call__
    return app(environ, start_response)
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/request_rewriter.py", line 311, in _rewriter_middleware
    response_body = iter(application(environ, wrapped_start_response))
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/python/request_handler.py", line 89, in __call__
    self._flush_logs(response.get('logs', []))
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/devappserver2/python/request_handler.py", line 225, in _flush_logs
    apiproxy_stub_map.MakeSyncCall('logservice', 'Flush', request, response)
  File "/home/arslan/GAE/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 94, in MakeSyncCall
    return stubmap.MakeSyncCall(service, call, request, response)
  File "/home/arslan/GAE/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 328, in MakeSyncCall
    rpc.CheckSuccess()
  File "/home/arslan/GAE/google_appengine/google/appengine/api/apiproxy_rpc.py", line 156, in _WaitImpl
    self.request, self.response)
  File "/home/arslan/GAE/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 200, in MakeSyncCall
    self._MakeRealSyncCall(service, call, request, response)
  File "/home/arslan/GAE/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 226, in _MakeRealSyncCall
    encoded_response = self._server.Send(self._path, encoded_request)
  File "/home/arslan/GAE/google_appengine/google/appengine/tools/appengine_rpc.py", line 393, in Send
    f = self.opener.open(req)
  File "/usr/lib/python2.7/urllib2.py", line 406, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 519, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 444, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 527, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 502: Proxy Error ( Connection refused )
INFO     2013-07-17 20:55:24,534 module.py:595] default: "GET /favicon.ico HTTP/1.1" 500 -

我在微软的windows中也遇到了同样的错误，所以切换到了Ubuntu，但我还是得到了这个错误。在我将我的Google app engine SDK更新为1.8.2之后，出现了这个错误，之前的版本运行良好

猜猜为什么会这样

---

提前感谢。

我当时正在使用代理，GAE/Python代码段在运行服务器之前检查更新，但无法使用代理找到更新服务器。这就是为什么我会犯这样的错误。 我开始在没有代理的情况下使用网络，事情开始正常工作：）