Celery Received unregistered task of type (run example)

Question

I think you need to restart the worker server. I meet the same problem and solve it by restarting.

I had the same problem: The reason of "Received unregistered task of type.." was that celeryd service didn't find and register the tasks on service start (btw their list is visible when you start ./manage.py celeryd --loglevel=info ).

These tasks should be declared in CELERY_IMPORTS = ("tasks", ) in settings file.
If you have a special celery_settings.py file it has to be declared on celeryd service start as --settings=celery_settings.py as digivampire wrote.

You can see the current list of registered tasks in the celery.registry.TaskRegistry class. Could be that your celeryconfig (in the current directory) is not in PYTHONPATH so celery can't find it and falls back to defaults. Simply specify it explicitly when starting celery.

celeryd --loglevel=INFO --settings=celeryconfig

You can also set --loglevel=DEBUG and you should probably see the problem immediately.

Whether you use CELERY_IMPORTS or autodiscover_tasks, the important point is the tasks are able to be found and the name of the tasks registered in Celery should match the names the workers try to fetch.

When you launch the Celery, say celery worker -A project --loglevel=DEBUG, you should see the name of the tasks. For example, if I have a debug_task task in my celery.py.

[tasks]
. project.celery.debug_task
. celery.backend_cleanup
. celery.chain
. celery.chord
. celery.chord_unlock
. celery.chunks
. celery.group
. celery.map
. celery.starmap

If you can't see your tasks in the list, please check your celery configuration imports the tasks correctly, either in --setting, --config, celeryconfig or config_from_object.

If you are using celery beat, make sure the task name, task, you use in CELERYBEAT_SCHEDULE matches the name in the celery task list.

I also had the same problem; I added

CELERY_IMPORTS=("mytasks")

in my celeryconfig.py file to solve it.

app = Celery('proj',
             broker='amqp://',
             backend='amqp://',
             include=['proj.tasks'])

please include=['proj.tasks'] You need go to the top dir, then exec this

celery -A app.celery_module.celeryapp worker --loglevel=info

not

celery -A celeryapp worker --loglevel=info

in your celeryconfig.py input imports = ("path.ptah.tasks",)

please in other module invoke task!!!!!!!!

Using --settings did not work for me. I had to use the following to get it all to work:

celery --config=celeryconfig --loglevel=INFO

Here is the celeryconfig file that has the CELERY_IMPORTS added:

# Celery configuration file
BROKER_URL = 'amqp://'
CELERY_RESULT_BACKEND = 'amqp://'

CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = 'America/Los_Angeles'
CELERY_ENABLE_UTC = True

CELERY_IMPORTS = ("tasks",)

My setup was a little bit more tricky because I'm using supervisor to launch celery as a daemon.