Celery does not registering tasks

Question

Hello! I just started to use Celery with Django. I’ve a task that i need to be periodic. In admin interface I can see my task in dropdown list named “Task (registered):”. But when Celery Beat tries to execute it NotRegistered exception is thrown.

Python 3.5.2, Django 1.11.4, Celery 4.1, django-celery-beat 1.1.0, django-celery-results 1.0.1

Part of settings.py related to celery:

CELERY_BROKER_URL = 'amqp://user:*****@192.168.X.X/proj'
CELERY_ACCEPT_CONTENT = ['json']
CELERY_RESULT_BACKEND = 'django-db'
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = 'Europe/Moscow'

celery.py and proj/__init__.py are identical to documentation examples.

proj/celery.py:

from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
from django.conf import settings

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'proj.settings')

app = Celery('proj')

app.config_from_object(settings, namespace='CELERY')

app.autodiscover_tasks()

@app.task(bind=True)
def debug_task(self):
    print('Request: {0!r}'.format(self.request))

proj/__init__.py:

from __future__ import absolute_import, unicode_literals
from .celery import app as celery_app

__all__ = ['celery_app']

tasks.py:

from celery import shared_task
from core.backend.files import SFTP

@shared_task
def load_files_from_sftp():
    ftp = SFTP()
    ftp.get_files()

I get the following json result:
{“exc_message”: “‘core.tasks.load_files_from_sftp'”, “exc_type”: “NotRegistered”}

If I try to use celery.task.control.inspect() from shell, it is only debug_task() there. Just stuck! ( I’ll be grateful for any help.

Asked By: Den Gavrilov

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Source

Answer 1

As @MuhammadShoaib wrote, it’s just one thing:

from django.apps import apps 

app.config_from_object(settings)
app.autodiscover_tasks(lambda: [n.name for n in apps.get_app_configs()])

instead of

app.autodiscover_tasks()

why this is not in the documentation?…

Answered By: Den Gavrilov

Answer 2

This might hopefully help someone.
I modified my code and neglected to restart the celery worker.
Restarting the celery workers helped.

Answered By: Karuhanga

Celery does not registering tasks

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