title: Django celery 4 - ValueError: invalid literal for int() with base 10 when start celery worker
body: <p>I have configured my celery.py as its documents but I put my celery broker url to AWS SQS but I cannot start it to work. When I run the celery worker, I get the ValueError as:</p>
  
  <pre>
  
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/celery/bin/base.py", line 244, in __call__
        ret = self.run(*args, **kwargs)
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/celery/bin/worker.py", line 255, in run
        **kwargs)
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/celery/worker/worker.py", line 99, in __init__
        self.setup_instance(**self.prepare_args(**kwargs))
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/celery/worker/worker.py", line 120, in setup_instance
        self._conninfo = self.app.connection_for_read()
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/celery/app/base.py", line 752, in connection_for_read
        return self._connection(url or self.conf.broker_read_url, **kwargs)
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/celery/app/base.py", line 828, in _connection
        'broker_connection_timeout', connect_timeout
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/kombu/connection.py", line 181, in __init__
        url_params = parse_url(hostname)
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/kombu/utils/url.py", line 34, in parse_url
        scheme, host, port, user, password, path, query = _parse_url(url)
      File "/Users/abd/Desktop/proj-aws/lib/python3.6/site-packages/kombu/utils/url.py", line 52, in url_to_parts
        parts.port,
      File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/parse.py", line 167, in port
        port = int(port, 10)
      ValueError: invalid literal for int() with base 10: 'xi'
  
  </pre>
  
  <p>I've been looking around but seems to have no clue how to fix this. Please help me out with this! Much appreciated! </p>