I have a flask app with sqlalchemy and a celery worker up and running. I use redis as my broker. Every time someone submits a new message in a conversation, a worker is started and is supposed to send notification mails to all people participating in the conversation. Thus it connects to the database and gets all relevant email addresses.
Unfortunately there seems to be a random factor deciding, whether celery knows the task that sends mail or not. After some starts it works perfectly (sometimes), after some starts it does not work at all. The error I get, when it does not work is:
[2012-11-28 21:42:58,751: ERROR/MainProcess] Received unregistered task of type 'messages.sendnotifies'.
The message has been ignored and discarded.
Did you remember to import the module containing this task?
Or maybe you are using relative imports?
Please see http://bit.ly/gLye1c for more information.
The full contents of the message body was:
{'retries': 0, 'task': 'messages.sendnotifies', 'eta': None, 'args': [41L], 'expires': None, 'callbacks': None, 'errbacks': None, 'kwargs': {}, 'id': '47da3ba7-ec91-4056-bb4f-a6afec2f960f', 'utc': True} (183b)
Traceback (most recent call last):
File "/var/www/virtual/venv/lib/python2.7/site-packages/celery/worker/consumer.py", line 410, in on_task_received
connection = self.connection
KeyError: 'messages.sendnotifies'
When i run celery with --loglevel=DEBUG it lists the task in the tasklist though:
[Tasks]
. celery.backend_cleanup
. celery.chain
. celery.chord
. celery.chord_unlock
. celery.chunks
. celery.group
. celery.map
. celery.starmap
. event.notfiy
. messages.sendnotifies
. money.checktransaction
. money.deploypayment
. money.invoicepromotion
. protocols.plotweight
. questionnaire.deploy
. questionnaire.suitability
. registration.notify
. tracking.track
. user.checkaccount
. user.checkaccounts
. user.fixpermissions
. user.genpassreset
I could not determine a system yet, when it works and when not. But I have upgraded all relevant packages to the latest version available today and it still does not work.
I am hoping for any ideas on why this might not work and how I might be able to fix it. Every feedback is very much appreciated, as I am kind of desperate!
