Celery worker not starting, *Unrecoverable error*

[alexprengere]

I just installed Celery v3.1.5 on Linux-2.6.34.9-69.fc13.x86_64-x86_64-with-fedora-13-Goddard. Fedora 13 uses Python 2.6.4.
After creating a minimalist task using Redis 2.6 as broker, I try to launch the worker, and get this error.

[ERROR/MainProcess] Unrecoverable error: TypeError('__init__() keywords must be strings',)
Traceback (most recent call last):
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/__init__.py", line 212, in start
    self.blueprint.start(self)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/bootsteps.py", line 123, in start
    step.start(parent)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/bootsteps.py", line 373, in start
    return self.obj.start()
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/consumer.py", line 270, in start
    blueprint.start(self)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/bootsteps.py", line 123, in start
    step.start(parent)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/consumer.py", line 789, in start
    c.loop(*c.loop_args())
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/loops.py", line 72, in asynloop
    next(loop)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/async/hub.py", line 333, in create_loop
    cb(*cbargs)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/transport/redis.py", line 822, in on_readable
    self._callbacks[queue](message)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/transport/virtual/__init__.py", line 502, in _callback
    message = self.Message(self, raw_message)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/transport/virtual/__init__.py", line 232, in __init__
    super(Message, self).__init__(channel, **dict(kwargs, **fields))
TypeError: __init__() keywords must be strings

A few remarks:

• I can launch the same worker with no problems on another machine I have, running Linux-3.8.13-100.fc17.x86_64-x86_64-with-fedora-17-Beefy_Miracle, using Python 2.7.3
• Celery installation went fine on both machines
• I tried a few days ago with Celery 3.1.4 and got the exact same results.

[ask]

Thanks! Please try the patch above

[alexprengere]

Thank for you very fast answer! I tried the above fix b7d6569fc19d3d6e6b552c14334a7f58497bd60e. It partially fixes the issue, since now I have a similar problem somewhere else:

[ERROR/MainProcess] Unrecoverable error: TypeError('on_heartbeat() keywords must be strings',)
Traceback (most recent call last):
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/__init__.py", line 212, in start
    self.blueprint.start(self)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/bootsteps.py", line 123, in start
    step.start(parent)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/bootsteps.py", line 373, in start
    return self.obj.start()
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/consumer.py", line 270, in start
    blueprint.start(self)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/bootsteps.py", line 123, in start
    step.start(parent)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/consumer.py", line 789, in start
    c.loop(*c.loop_args())
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/loops.py", line 72, in asynloop
    next(loop)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/async/hub.py", line 333, in create_loop
    cb(*cbargs)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/transport/redis.py", line 822, in on_readable
    self._callbacks[queue](message)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/transport/virtual/__init__.py", line 505, in _callback
    return callback(message)
  File "/home/robb/.local/lib/python2.6/site-packages/kombu/messaging.py", line 589, in _receive_callback
    return on_m(message) if on_m else self.receive(decoded, message)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/worker/consumer.py", line 738, in on_message
    worker, created = self.update_state(subject, event)
  File "/home/robb/.local/lib/python2.6/site-packages/celery/events/state.py", line 355, in worker_event
    handler(**fields)
TypeError: on_heartbeat() keywords must be strings

[alexprengere]

With the commit 4d230e2 you just referenced, it works ;). Thanks a lot for your support! I guess the next minor release will include those changes?

[ask]

Yes! They will be included in the next bugfix release!