HTTP錯誤503：服務在appengine python「留言簿」應用程序中不可用

Question

我正在Google AppEngine Python SDK上運行演示python留言簿應用程序，但它在瀏覽器中發出此類錯誤。我沒有改變腳本文件中的任何一行代碼。

我使用的Python版本2.7.10 谷歌的Python SDK版本 「GoogleAppEngine-1.9.28.exe」 和webapp2的框架。

錯誤：

the runtime process gave a bad HTTP response: '' 

WARNING 2015-11-17 08:29:59,892 tasklets.py:410] suspended generator run_to_queue(query.py:938) raised HTTPError(HTTP Error 503: Service Unavailable) 
WARNING 2015-11-17 08:29:59,894 tasklets.py:410] suspended generator helper(context.py:876) raised HTTPError(HTTP Error 503: Service Unavailable) 
ERROR 2015-11-17 08:29:59,894 webapp2.py:1552] HTTP Error 503: Service Unavailable 
Traceback (most recent call last): 
    File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1535, in __call__ 
    rv = self.handle_exception(request, response, e) 
    File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1529, in __call__ 
    rv = self.router.dispatch(request, response) 
    File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1278, in default_dispatcher 
    return route.handler_adapter(request, response) 
    File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1102, in __call__ 
    return handler.dispatch() 
    File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 572, in dispatch 
    return self.handle_exception(e, self.app.debug) 
    File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 570, in dispatch 
    return method(*args, **kwargs) 
    File "C:\Users\abhilash singh\Documents\guestbook\guestbook.py", line 42, in get 
    for greeting in greetings: 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\query.py", line 1774, in next 
    self._more_results) = self._fut.get_result() 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\tasklets.py", line 326, in get_result 
    self.check_success() 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\context.py", line 876, in helper 
    batch, i, ent = yield inq.getq() 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\query.py", line 938, in run_to_queue 
    batch = yield rpc 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\tasklets.py", line 455, in _on_rpc_completion 
    result = rpc.get_result() 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_stub_map.py", line 613, in get_result 
    return self.__get_result_hook(self) 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\datastore\datastore_query.py", line 2907, in __query_result_hook 
    self._batch_shared.conn.check_rpc_success(rpc) 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\datastore\datastore_rpc.py", line 1371, in check_rpc_success 
    rpc.check_success() 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_stub_map.py", line 579, in check_success 
    self.__rpc.CheckSuccess() 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_rpc.py", line 157, in _WaitImpl 
    self.request, self.response) 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\remote_api\remote_api_stub.py", line 201, in MakeSyncCall 
    self._MakeRealSyncCall(service, call, request, response) 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\remote_api\remote_api_stub.py", line 227, in _MakeRealSyncCall 
    encoded_response = self._server.Send(self._path, encoded_request) 
    File "C:\Program Files (x86)\Google\google_appengine\google\appengine\tools\appengine_rpc.py", line 393, in Send 
    f = self.opener.open(req) 
    File "C:\Python27\lib\urllib2.py", line 437, in open 
    response = meth(req, response) 
    File "C:\Python27\lib\urllib2.py", line 550, in http_response 
    'http', request, response, code, msg, hdrs) 
    File "C:\Python27\lib\urllib2.py", line 475, in error 
    return self._call_chain(*args) 
    File "C:\Python27\lib\urllib2.py", line 409, in _call_chain 
    result = func(*args) 
    File "C:\Python27\lib\urllib2.py", line 558, in http_error_default 
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) 
HTTPError: HTTP Error 503: Service Unavailable 

有什麼建議？

Answer 1

你運行的哪個命令失敗了？根據您提供的堆棧跟蹤，看起來您正在使用Remote API連接到已部署的應用程序並通過數據存儲實體進行查詢。如果您尚未將應用程序部署到App Engine的服務器，則此命令將不會成功，並且很可能會導致您分享的503錯誤。