Error in logfile

[timrichardson]

Summary:

Include a brief description of the problem here, and fill out the version info below.

Error in stderr. Searching (chatgpt) indicates a problem with old versions, but I am using the latest.
Although the error trace indicates that this is a celery redis backend problem, not specifically celery-beat, I never see this error in other logfiles.

The tasks that are run in celery-beat are invoked in other ways (e.g. from django admin "run" or simply from a python shell) and I never see this error elsewhere. This is why I have reported it here.

My requirements are managed in requirements.txt imported into Dockerfile

• Celery Version: celery==5.3.6
• Celery-Beat Version:
• django-celery-beat==2.5.0

Exact steps to reproduce the issue:

1. I have periodic scheduled tasks.

Detailed information

I am running celery-beat via supervisor.

It is invoked via this configuration:

[program:celery_beat]
directory = /opt/app
command = celery --app project beat --pidfile=  --loglevel info --scheduler django_celery_beat.schedulers:DatabaseScheduler
autorestart = true
startretries=3

The supervisor log has repeated messages like this
( from celery_beat-stderr---supervisor-51cyqtpg.log )

Exception ignored in: <function AsyncResult.__del__ at 0x7f422d71cb80> 
Traceback (most recent call last): 
  File "/usr/local/lib/python3.11/site-packages/celery/result.py", line 417, in __del__ 
    self.backend.remove_pending_result(self) 
  File "/usr/local/lib/python3.11/site-packages/celery/backends/asynchronous.py", line 208, in remove_pending_result 
    self.on_result_fulfilled(result) 
  File "/usr/local/lib/python3.11/site-packages/celery/backends/asynchronous.py", line 216, in on_result_fulfilled 
    self.result_consumer.cancel_for(result.id) 
  File "/usr/local/lib/python3.11/site-packages/celery/backends/redis.py", line 183, in cancel_for 
    with self.reconnect_on_error(): 
  File "/usr/local/lib/python3.11/contextlib.py", line 155, in __exit__ 
    self.gen.throw(typ, value, traceback) 
  File "/usr/local/lib/python3.11/site-packages/celery/backends/redis.py", line 130, in reconnect_on_error 
    self._ensure(self._reconnect_pubsub, ()) 
  File "/usr/local/lib/python3.11/site-packages/celery/backends/redis.py", line 384, in ensure 
    return retry_over_time( 
           ^^^^^^^^^^^^^^^^ 
  File "/usr/local/lib/python3.11/site-packages/kombu/utils/functional.py", line 318, in retry_over_time 
    return fun(*args, **kwargs) 
           ^^^^^^^^^^^^^^^^^^^^ 
  File "/usr/local/lib/python3.11/site-packages/celery/backends/redis.py", line 122, in _reconnect_pubsub 
    self._pubsub.connection.register_connect_callback(self._pubsub.on_connect) 
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
AttributeError: 'Connection' object has no attribute 'register_connect_callback'

Please include more detailed information here, such as relevant information about your system setup, things you did to try and debug the problem, log messages, etc.

[timrichardson]

also
django-redis==5.4.0

[cclauss]

Please retry with v2.6.0 which was released yesterday.

• https://github.com/celery/django-celery-beat/releases

[timrichardson]

thanks. So far after a few minutes I have not seen this, I will come back in a few days either way.