Kombo + SQS + PyCurl, 'NoneType' object has no attribute 'call_repeatedly'

Hi. I’m running the lastest Kombu master (w/ stable 4.0.2 Celery), SQS Broker, with Django DB Backend, and I run into this error.

[2017-05-31 08:08:47,205: ERROR/MainProcess] Pending callback raised: AttributeError("'NoneType' object has no attribute 'call_repeatedly'",)
Traceback (most recent call last):
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/celery/worker/consumer/consumer.py", line 233, in perform_pending_operations
    self._pending_operations.pop()()
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/vine/promises.py", line 139, in __call__
    return self.throw()
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/vine/promises.py", line 136, in __call__
    retval = fun(*final_args, **final_kwargs)
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/message.py", line 130, in ack_log_error
    self.ack(multiple=multiple)
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/message.py", line 125, in ack
    self.channel.basic_ack(self.delivery_tag, multiple=multiple)
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/transport/SQS.py", line 380, in basic_ack
    self.asynsqs.delete_message(message['sqs_queue'],
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/transport/SQS.py", line 436, in asynsqs
    region=self.region
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/async/aws/sqs/connection.py", line 27, in __init__
    **kwargs
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/async/aws/connection.py", line 178, in __init__
    **http_client_params)
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/async/aws/connection.py", line 151, in __init__
    self._httpclient = http_client or get_client()
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/async/http/__init__.py", line 22, in get_client
    client = hub._current_http_client = Client(hub, **kwargs)
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/async/http/__init__.py", line 13, in Client
    return CurlClient(hub, **kwargs)
  File "/home/ubuntu/ies-league/venv/local/lib/python2.7/site-packages/kombu/async/http/curl.py", line 57, in __init__
    self._timeout_check_tref = self.hub.call_repeatedly(
AttributeError: 'NoneType' object has no attribute 'call_repeatedly'
[2017-05-31 08:08:47,207: ERROR/MainProcess] Pending callback raised: AttributeError("'NoneType' object has no attribute 'call_repeatedly'",)

[alukach]

Okay, digging through the Kombu source code, it appears I needed to add the following near the top of my Consumer file:

from kombu.async import Hub, set_event_loop

set_event_loop(Hub())

This will ensure that a Hub object is returned when get_event_loop() is called in kombu/async/http/__init__.py:

def get_client(hub=None, **kwargs):
    """Get or create HTTP client bound to the current event loop."""
    hub = hub or get_event_loop()
    try:
        return hub._current_http_client
    except AttributeError:
        client = hub._current_http_client = Client(hub, **kwargs)
        return client

What would be the harm in having get_event_loop() call set_event_loop(Hub()) if no event loop currently exists? I’d be happy to make a PR for this.

[nsonic001]

Is this issue resolved, or which version is stable? I am experiencing the same issue.