Error

gistfile1.txt

pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno -5] No address associated with hostname
127.0.0.1 - - [08/Jul/2019 09:29:08] "POST /auth HTTP/1.1" 500 -
127.0.0.1 - - [08/Jul/2019 09:29:10] "POST /auth HTTP/1.1" 500 -
127.0.0.1 - - [08/Jul/2019 09:29:10] "POST /auth HTTP/1.1" 500 -
127.0.0.1 - - [08/Jul/2019 09:29:10] "POST /auth HTTP/1.1" 500 -
127.0.0.1 - - [08/Jul/2019 09:29:10] "POST /auth HTTP/1.1" 500 -
127.0.0.1 - - [08/Jul/2019 09:29:11] "POST /auth HTTP/1.1" 500 -
127.0.0.1 - - [08/Jul/2019 09:29:15] "OPTIONS /addUser HTTP/1.1" 200 -
127.0.0.1 - - [08/Jul/2019 09:29:45] "POST /addUser HTTP/1.1" 500 -
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 2309, in __call__
    return self.wsgi_app(environ, start_response)
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 2295, in wsgi_app
    response = self.handle_exception(e)
  File "/usr/local/lib/python3.5/dist-packages/flask_cors/extension.py", line 161, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1741, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.5/dist-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python3.5/dist-packages/flask_cors/extension.py", line 161, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.5/dist-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.5/dist-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/dell/helios/Helios-Backend/app/auth.py", line 88, in addUser
    for x in record.find():
  File "/usr/local/lib/python3.5/dist-packages/pymongo/cursor.py", line 1225, in next
    if len(self.__data) or self._refresh():
  File "/usr/local/lib/python3.5/dist-packages/pymongo/cursor.py", line 1117, in _refresh
    self.__session = self.__collection.database.client._ensure_session()
  File "/usr/local/lib/python3.5/dist-packages/pymongo/mongo_client.py", line 1598, in _ensure_session
    return self.__start_session(True, causal_consistency=False)
  File "/usr/local/lib/python3.5/dist-packages/pymongo/mongo_client.py", line 1551, in __start_session
    server_session = self._get_server_session()
  File "/usr/local/lib/python3.5/dist-packages/pymongo/mongo_client.py", line 1584, in _get_server_session
    return self._topology.get_server_session()
  File "/usr/local/lib/python3.5/dist-packages/pymongo/topology.py", line 429, in get_server_session
    None)
  File "/usr/local/lib/python3.5/dist-packages/pymongo/topology.py", line 200, in _select_servers_loop
    self._error_message(selector))
pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno -5] No address associated with hostname