Celery Received unregistered task of type (run example)

Question

I\'m trying to run example from Celery documentation.

I run: celeryd --loglevel=INFO

/usr/local/lib/python2.7/dist-packages/celery/loade         


        

Answer 1

In my case the error was because one container created files in a folder that were mounted on the host file-system with docker-compose.

I just had to do remove the files created by the container on the host system and I was able to launch my project again.

sudo rm -Rf foldername

(I had to use sudo because the files were owned by the root user)

Docker version: 18.03.1

Answer 2

app = Celery(__name__, broker=app.config['CELERY_BROKER'], 
backend=app.config['CELERY_BACKEND'], include=['util.xxxx', 'util.yyyy'])

Answer 3

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.

Answer 4

I had the same problem running tasks from Celery Beat. Celery doesn't like relative imports so in my celeryconfig.py, I had to explicitly set the full package name:

app.conf.beat_schedule = {
   'add-every-30-seconds': {
        'task': 'full.path.to.add',
        'schedule': 30.0,
        'args': (16, 16)
    },
}

Answer 5

Celery doesn't support relative imports so in my celeryconfig.py, you need absolute import.

CELERYBEAT_SCHEDULE = {
        'add_num': {
            'task': 'app.tasks.add_num.add_nums',
            'schedule': timedelta(seconds=10),
            'args': (1, 2)
        }
}

Answer 6

I had this problem mysteriously crop up when I added some signal handling to my django app. In doing so I converted the app to use an AppConfig, meaning that instead of simply reading as 'booking' in INSTALLED_APPS, it read 'booking.app.BookingConfig'.

Celery doesn't understand what that means, so I added, INSTALLED_APPS_WITH_APPCONFIGS = ('booking',) to my django settings, and modified my celery.py from

app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)

to

app.autodiscover_tasks(
    lambda: settings.INSTALLED_APPS + settings.INSTALLED_APPS_WITH_APPCONFIGS
)