TypeError: not all arguments converted during string formatting; from AMQPError('Unknown AMQP method %s' % method_sig)

[yourcelf]

I just upgraded from:

amqplib==1.0.2
celery==3.0.11
django-celery==3.0.10
kombu==2.4.7

to

amqp==1.0.6
celery==3.0.12
django-celery==3.0.11
kombu==2.5.3

After upgrading, attempting to launch celeryd with python manage.py celeryd fails with:

Traceback (most recent call last):
  File "/venv/lib/python2.6/site-packages/celery/worker/__init__.py", line 347, in start
    component.start()
  File "/venv/lib/python2.6/site-packages/celery/worker/consumer.py", line 389, in start
    self.reset_connection()
  File "/venv/lib/python2.6/site-packages/celery/worker/consumer.py", line 736, in reset_connection
    self.reset_pidbox_node()
  File "/venv/lib/python2.6/site-packages/celery/worker/consumer.py", line 679, in reset_pidbox_node
    callback=self.on_control)
  File "/venv/lib/python2.6/site-packages/kombu/pidbox.py", line 71, in listen
    consumer.consume()
  File "/venv/lib/python2.6/site-packages/kombu/messaging.py", line 398, in consume
    self._basic_consume(T, no_ack=no_ack, nowait=False)
  File "/venv/lib/python2.6/site-packages/kombu/messaging.py", line 519, in _basic_consume
    no_ack=no_ack, nowait=nowait)
  File "/venv/lib/python2.6/site-packages/kombu/entity.py", line 571, in consume
    nowait=nowait)
  File "/venv/lib/python2.6/site-packages/amqp/channel.py", line 1767, in basic_consume
    (60, 21),  # Channel.basic_consume_ok
  File "/venv/lib/python2.6/site-packages/amqp/abstract_channel.py", line 68, in wait
    self.channel_id, allowed_methods)
  File "/venv/lib/python2.6/site-packages/amqp/connection.py", line 239, in _wait_method
    self.wait()
  File "/venv/lib/python2.6/site-packages/amqp/abstract_channel.py", line 70, in wait
    return self.dispatch_method(method_sig, args, content)
  File "/venv/lib/python2.6/site-packages/amqp/abstract_channel.py", line 84, in dispatch_method
    raise AMQPError('Unknown AMQP method %r' % method_sig)
TypeError: not all arguments converted during string formatting

Inspecting with the debugger, it looks like method_sig is a two-tuple of integers, hence the error. Changing the formatting string to accept two arguments doesn't fix the real problem, however; celeryd still crashes with the Unknown AMQP method error.

[sdistefano]

+1

[sdistefano]

Downgrading kombu to 2.4.7 fixed this for me

[mwalling]

+1 as well. The unknown AMQP method is (10, 60). Like @sdistefano said, downgrading fixes it.

[andreif]

It does fix, however celeryev raises pkg_resources.DistributionNotFound: kombu>=2.4.8,<3.0 for the old kombu.

[scardine]

I have the same issue here. I would be more than happy to fix it but I'm a little lost here. If you are familiar with this codebase, please give some hint about how to approach the problem.

I think I will check kombu to see what changed between versions.

[bastibense]

+1 here. Had to downgrade to kombu 2.4.10 to make this work. Anything newer will prevent celery worker from starting up. Using celery v3.0.15 with Django 1.5.

[ask]

Hey guys!

The rabbitmq-server you're using is not new enough to support AMQP 0-9-1,
you can either upgrade to the latest version or use the amqplib:// transport.

I will be updating the specs to specify which version is required,
apparently Debian has a very old version

[danieljb]

Not having permissions to upgrade the rabbitMQ server replacing

  BROKER_URL = 'amqp://…' 

to

  BROKER_URL = 'amqplib://…' 

fixed it for me. Just for the record.

[shrikantkakani]

I'm getting a new error: 'pkg_resources.DistributionNotFound: kombu>=3.0.8,<4.0'.
Currently I'm using Kombu version 3.0.24 which is the latest available version which does comes between the version numbers mentioned above (List of Kombu versions: http://kombu.readthedocs.org/en/latest/changelog.html). Did anyone of you ever got troubled with this? If yes, then what did you do to resolve this?