ConnectionError: HTTPConnectionPool(host='<domain>', port=<port>): Max retries exceeded with url: /...

[sentryk8sonalabsorg]

Sentry Issue: ONADATA-3A3

ParsedInstance.DoesNotExist: ParsedInstance matching query does not exist.
  File "django/db/models/query.py", line 581, in get_or_create
    return self.get(**kwargs), False
  File "django/db/models/query.py", line 435, in get
    raise self.model.DoesNotExist(

gaierror: [Errno -2] Name or service not known
  File "urllib3/connection.py", line 174, in _new_conn
    conn = connection.create_connection(
  File "urllib3/util/connection.py", line 72, in create_connection
    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
  File "socket.py", line 955, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):

NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7fc4ebb6dc00>: Failed to establish a new connection: [Errno -2] Name or service not known
(5 additional frame(s) were not displayed)
...
  File "http/client.py", line 1278, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "http/client.py", line 1038, in _send_output
    self.send(msg)
  File "http/client.py", line 976, in send
    self.connect()
  File "urllib3/connection.py", line 205, in connect
    conn = self._new_conn()
  File "urllib3/connection.py", line 186, in _new_conn
    raise NewConnectionError(

MaxRetryError: HTTPConnectionPool(host='<domain>', port=<port>): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fc4ebb6dc00>: Failed to establish a new connection: [Errno -2] Name or service not known'))
  File "requests/adapters.py", line 489, in send
    resp = conn.urlopen(
  File "urllib3/connectionpool.py", line 787, in urlopen
    retries = retries.increment(
  File "urllib3/util/retry.py", line 592, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))

ConnectionError: HTTPConnectionPool(host='<domain>', port=<port>): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fc4ebb6dc00>: Failed to establish a new connection: [Errno -2] Name or service not known'))
(2 additional frame(s) were not displayed)
...
  File "onadata/apps/restservice/utils.py", line 24, in call_service
    service.send(service_def.service_url, submission_instance)
  File "onadata/apps/restservice/services/generic_json.py", line 24, in send
    requests.post(url, headers=headers, data=post_data)