ConnectionError: HTTPConnectionPool(host='scheduler.ii.uni.wroc.pl', port=8000): Max retries exceeded with url: /admin/login/ (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f41ce855250>: Failed to establish a new connection

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View details in Rollbar: https://app.rollbar.com/a/iiuni/fix/item/projektzapisy/542

Traceback (most recent call last):
  File "/home/zapisy/deploy/releases/20230828210355/zapisy/apps/schedulersync/management/commands/import_schedule.py", line 253, in handle
    self.import_from_api(dont_delete_terms_flag, write_to_slack_flag, interactive_flag)
  File "/home/zapisy/deploy/releases/20230828210355/zapisy/apps/schedulersync/management/commands/import_schedule.py", line 216, in import_from_api
    scheduler_data.get_scheduler_data()
  File "/home/zapisy/deploy/releases/20230828210355/zapisy/apps/schedulersync/scheduler_data.py", line 222, in get_scheduler_data
    api_config, api_task = self.fetch_data_from_scheduler()
  File "/home/zapisy/deploy/releases/20230828210355/zapisy/apps/schedulersync/scheduler_data.py", line 172, in fetch_data_from_scheduler
    client = get_logged_client()
  File "/home/zapisy/deploy/releases/20230828210355/zapisy/apps/schedulersync/scheduler_data.py", line 165, in get_logged_client
    client.get(self.api_login_url)
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/requests/sessions.py", line 602, in get
    return self.request("GET", url, **kwargs)
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/requests/adapters.py", line 519, in send
    raise ConnectionError(e, request=request)
ConnectionError: HTTPConnectionPool(host='scheduler.ii.uni.wroc.pl', port=8000): Max retries exceeded with url: /admin/login/ (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f41ce855250>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution'))Traceback (most recent call last):
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/requests/adapters.py", line 486, in send
    resp = conn.urlopen(
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 798, in urlopen
    retries = retries.increment(
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/util/retry.py", line 592, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
MaxRetryError: HTTPConnectionPool(host='scheduler.ii.uni.wroc.pl', port=8000): Max retries exceeded with url: /admin/login/ (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f41ce855250>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution'))Traceback (most recent call last):
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 714, in urlopen
    httplib_response = self._make_request(
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 415, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/connection.py", line 244, in request
    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
  File "/usr/lib/python3.8/http/client.py", line 1256, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1302, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1251, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1011, in _send_output
    self.send(msg)
  File "/usr/lib/python3.8/http/client.py", line 951, in send
    self.connect()
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/connection.py", line 205, in connect
    conn = self._new_conn()
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/connection.py", line 186, in _new_conn
    raise NewConnectionError(
NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f41ce855250>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolutionTraceback (most recent call last):
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/connection.py", line 174, in _new_conn
    conn = connection.create_connection(
  File "/home/zapisy/deploy/current/venv/lib/python3.8/site-packages/urllib3/util/connection.py", line 72, in create_connection
    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
  File "/usr/lib/python3.8/socket.py", line 918, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
gaierror: [Errno -3] Temporary failure in name resolution