1
2019-07-21 10:56:02.514949 app[web.1]:  Exception in thread Thread-2:
2019-07-21 10:56:02.514963 app[web.1]:  Traceback (most recent call last):
2019-07-21 10:56:02.514965 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/connectionpool.py", line 384, in _make_request
2019-07-21 10:56:02.514967 app[web.1]:  six.raise_from(e, None)
2019-07-21 10:56:02.514969 app[web.1]:  File "<string>", line 2, in raise_from
2019-07-21 10:56:02.514971 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/connectionpool.py", line 380, in _make_request
2019-07-21 10:56:02.514973 app[web.1]:  httplib_response = conn.getresponse()
2019-07-21 10:56:02.514976 app[web.1]:  File "/app/.heroku/python/lib/python3.7/http/client.py", line 1321, in getresponse
2019-07-21 10:56:02.514978 app[web.1]:  response.begin()
2019-07-21 10:56:02.514980 app[web.1]:  File "/app/.heroku/python/lib/python3.7/http/client.py", line 296, in begin
2019-07-21 10:56:02.514982 app[web.1]:  version, status, reason = self._read_status()
2019-07-21 10:56:02.514985 app[web.1]:  File "/app/.heroku/python/lib/python3.7/http/client.py", line 257, in _read_status
2019-07-21 10:56:02.514987 app[web.1]:  line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
2019-07-21 10:56:02.514989 app[web.1]:  File "/app/.heroku/python/lib/python3.7/socket.py", line 589, in readinto
2019-07-21 10:56:02.514991 app[web.1]:  return self._sock.recv_into(b)
2019-07-21 10:56:02.514996 app[web.1]:  socket.timeout: timed out
2019-07-21 10:56:02.514999 app[web.1]:
2019-07-21 10:56:02.515001 app[web.1]:  During handling of the above exception, another exception occurred:
2019-07-21 10:56:02.515003 app[web.1]:
2019-07-21 10:56:02.515005 app[web.1]:  Traceback (most recent call last):
2019-07-21 10:56:02.515007 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/requests/adapters.py", line 449, in send
2019-07-21 10:56:02.515009 app[web.1]:  timeout=timeout
2019-07-21 10:56:02.515011 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/connectionpool.py", line 638, in urlopen
2019-07-21 10:56:02.515013 app[web.1]:  _stacktrace=sys.exc_info()[2])
2019-07-21 10:56:02.515015 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/util/retry.py", line 367, in increment
2019-07-21 10:56:02.515018 app[web.1]:  raise six.reraise(type(error), error, _stacktrace)
2019-07-21 10:56:02.515020 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/packages/six.py", line 686, in reraise
2019-07-21 10:56:02.515022 app[web.1]:  raise value
2019-07-21 10:56:02.515024 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/connectionpool.py", line 600, in urlopen
2019-07-21 10:56:02.515026 app[web.1]:  chunked=chunked)
2019-07-21 10:56:02.515028 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/connectionpool.py", line 386, in _make_request
2019-07-21 10:56:02.515030 app[web.1]:  self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
2019-07-21 10:56:02.515032 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/urllib3/connectionpool.py", line 306, in _raise_timeout
2019-07-21 10:56:02.515034 app[web.1]:  raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
2019-07-21 10:56:02.515038 app[web.1]:  urllib3.exceptions.ReadTimeoutError: HTTPConnectionPool(host='sarabot2.herokuapp.com', port=80): Read timed out. (read timeout=50)
2019-07-21 10:56:02.515039 app[web.1]:
2019-07-21 10:56:02.515041 app[web.1]:  During handling of the above exception, another exception occurred:
2019-07-21 10:56:02.515044 app[web.1]:
2019-07-21 10:56:02.515046 app[web.1]:  Traceback (most recent call last):
2019-07-21 10:56:02.515048 app[web.1]:  File "/app/.heroku/python/lib/python3.7/threading.py", line 917, in _bootstrap_inner
2019-07-21 10:56:02.515050 app[web.1]:  self.run()
2019-07-21 10:56:02.515052 app[web.1]:  File "/app/.heroku/python/lib/python3.7/threading.py", line 865, in run
2019-07-21 10:56:02.515054 app[web.1]:  self._target(*self._args, **self._kwargs)
2019-07-21 10:56:02.515056 app[web.1]:  File "/app/app.py", line 1055, in restart
2019-07-21 10:56:02.515058 app[web.1]:  requests.head(f'http://{domain}.herokuapp.com/gtcheck',timeout=50)
2019-07-21 10:56:02.515060 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/requests/api.py", line 101, in head
2019-07-21 10:56:02.515062 app[web.1]:  return request('head', url, **kwargs)
2019-07-21 10:56:02.515064 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/requests/api.py", line 60, in request
2019-07-21 10:56:02.515066 app[web.1]:  return session.request(method=method, url=url, **kwargs)
2019-07-21 10:56:02.515068 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/requests/sessions.py", line 524, in request
2019-07-21 10:56:02.515070 app[web.1]:  resp = self.send(prep, **send_kwargs)
2019-07-21 10:56:02.515072 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/requests/sessions.py", line 637, in send
2019-07-21 10:56:02.515075 app[web.1]:  r = adapter.send(request, **kwargs)
2019-07-21 10:56:02.515076 app[web.1]:  File "/app/.heroku/python/lib/python3.7/site-packages/requests/adapters.py", line 529, in send
2019-07-21 10:56:02.515078 app[web.1]:  raise ReadTimeout(e, request=request)
2019-07-21 10:56:02.515081 app[web.1]:  requests.exceptions.ReadTimeout: HTTPConnectionPool(host='sarabot2.herokuapp.com', port=80): Read timed out. (read timeout=50)
2019-07-21 10:56:02.515083 app[web.1]:

Will @app.before_serving cause this ?


Exception in thread Thread-2: Where it happens

Smart Manoj
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1 Answers1

1

Will @app.before_serving cause this ?

Yes, if the @app.before_serving decorated function doesn't finish the app will not start serving requests. In your case it looks as if sarabot2.herokuapp.com isn't replying promptly to your request.

Also note that requests is synchronous and hence will block the event loop, aiohttp (or requests-async) would be better choices.

pgjones
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