Warnings about __version__, tz and utc_enabled

[yuvadm]

Every default celery worker running with -B prints the following warnings:

[2014-03-17 09:37:00,741: WARNING/Beat] Reset: Account for new __version__ field
[2014-03-17 09:37:00,742: WARNING/Beat] Reset: Account for new tz field
[2014-03-17 09:37:00,742: WARNING/Beat] Reset: Account for new utc_enabled field

It is not clear why they are printed, what their meaning is, or how to fix them if they actually indicate of a problematic configuration.

Can anyone shed some light on this?

[ask]

The log messages specifically means that it's upgrading a celerybeat-schedule file, but in your case I guess it's there because it had to create one (no existing db) or the db was broken.

[yuvadm]

@ask for a first run it makes sense, but this happens on subsequent start of the worker+beat process. Is my schedule not persistent? Did I perhaps forget to set Redis as the schedule backend? (Checking...)

[ask]

@yuvadm I'm not sure but it does seem like the celerybeat-schedule file is removed maybe?

[yuvadm]

@ask these are tasks running on Heroku. Do I need to explicitly tell celery to use Redis somehow? I can't find a config for this, and Redis is properly configured otherwise.

[ask]

@yuvadm This is not a regular db, it's a DBM file named celerybeat-schedule, it may end up with a suffix at the end (often .db, but this depends on the underlying dbm implementation). It will be created in the same directory as the worker, but you can specify a custom path using the --schedule argument.

[yuvadm]

@ask yeah I'm familiar with the file, I just thought there's a way to set the scheduler to use Redis as the backend for that purpose. But I don't really care about it. Just wanted to make sure these warning aren't hiding something sneaky. Thanks!