Broken with timezone support enabled in Django 1.4

[2012-07-09 13:04:27,650: WARNING/Beat] Process Beat:
[2012-07-09 13:04:27,650: WARNING/Beat] Traceback (most recent call last):
[2012-07-09 13:04:27,650: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/billiard/process.py", line 273, in _bootstrap
[2012-07-09 13:04:27,651: WARNING/Beat] self.run()
[2012-07-09 13:04:27,651: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/celery/beat.py", line 462, in run
[2012-07-09 13:04:27,652: WARNING/Beat] self.service.start(embedded_process=True)
[2012-07-09 13:04:27,652: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/celery/beat.py", line 400, in start
[2012-07-09 13:04:27,652: WARNING/Beat] interval = self.scheduler.tick()
[2012-07-09 13:04:27,652: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/celery/beat.py", line 193, in tick
[2012-07-09 13:04:27,653: WARNING/Beat] next_time_to_run = self.maybe_due(entry, self.publisher)
[2012-07-09 13:04:27,653: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/celery/beat.py", line 171, in maybe_due
[2012-07-09 13:04:27,653: WARNING/Beat] is_due, next_time_to_run = entry.is_due()
[2012-07-09 13:04:27,654: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/djcelery/schedulers.py", line 59, in is_due
[2012-07-09 13:04:27,654: WARNING/Beat] return self.schedule.is_due(self.last_run_at)
[2012-07-09 13:04:27,654: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/celery/schedules.py", line 72, in is_due
[2012-07-09 13:04:27,655: WARNING/Beat] rem_delta = self.remaining_estimate(last_run_at)
[2012-07-09 13:04:27,655: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/celery/schedules.py", line 42, in remaining_estimate
[2012-07-09 13:04:27,655: WARNING/Beat] now=self.now())
[2012-07-09 13:04:27,656: WARNING/Beat] File "/Users/jezdez/.virtualenvs/gidsy/lib/python2.7/site-packages/celery/utils/timeutils.py", line 145, in remaining
[2012-07-09 13:04:27,656: WARNING/Beat] return end_date - now
[2012-07-09 13:04:27,656: WARNING/Beat] TypeError: can't subtract offset-naive and offset-aware datetimes

[bmbouter]

I think this is still broken. I am using celery==3.0.3 and django-celery==3.0.1 and pytz==2012c

I am following this documentation

In my settings.py I have: CELERY_ENABLE_UTC = False CELERY_TIMEZONE = ‘America/New_York’ USE_TZ = True TIME_ZONE = ‘America/New_York’

I am using this task code. send_hour is set by this link.

I recently updated the time-zone settings and that is when this broke. I post the comment here because I received a very similar traceback as this post. I then deleted the celery scheduler database and the worker now starts correctly.

The task should be run daily at 6pm EDT, but instead I receive it perfectly at 2pm EDT, which is 6PM UTC. Therefore I conclude that some part of running celery through django-celery is not using my local timezone.

[bmbouter]

This fixed the problem perfectly for me too. I tested it!

Great job Ask!

Best, Brian

On Fri, Aug 24, 2012 at 4:18 AM, aleg [e-mail] wrote:

Great! This fixes the problem for me. Thanks linhlarry!

— Reply to this email directly or view it on GitHubhttps://github.com/celery/django-celery/issues/150#issuecomment-7995194.

Brian Bouterse The Friday Institute