Cannot start Celery Worker (Kombu.asynchronous.timer)

python python-3.x celery django-celery celery-task
Kshitij G picture Kshitij G · May 24, 2018 · Viewed 8.9k times · Source

I followed the first steps with Celery (Django) and trying to run a heavy process in the background. I have RabbitMQ server installed. However, when I try, celery -A my_app worker -l info it throws the following error

File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "c:\anaconda3\lib\site-packages\celery\concurrency\prefork.py", line 
18, in <module>
from celery.concurrency.base import BasePool
File "c:\anaconda3\lib\site-packages\celery\concurrency\base.py", line 15, 
in <module>
from celery.utils import timer2
File "c:\anaconda3\lib\site-packages\celery\utils\timer2.py", line 16, in 
<module>
from kombu.asynchronous.timer import Entry
ModuleNotFoundError: No module named 'kombu.asynchronous.timer'

I've searched a lot, but can't seem to get it working. Any help will be highly appreciated. Thank you!

Answer

Corri picture Corri · Oct 4, 2019

I had this issue with the default Celery installation from pip (3.1.26Post2). As mentionned above, I installed instead version 3.1.25, but Celery was still not working. Thus I explicitly installed the latest version:

pip install Celery==4.3

and everything is working now!

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