Public bug reported:
Installation of mailman3-web (0+20200530-2.1) on mantic produces this
warning:
Creating config file /etc/mailman3/mailman-web.py with new version
/usr/lib/python3/dist-packages/django_q/conf.py:139: UserWarning: Retry and
timeout are misconfigured. Set retry larger than timeout,
failure to do so will cause the tasks to be retriggered before
completion.
See https://django-q.readthedocs.io/en/latest/configure.html#retry
for details.
This refers to the 'retry' and 'timeout' fields of the Q_CLUSTER
dictionary configured in /usr/share/mailman3-web/settings.py.
That file sets 'timeout' to 300, but has no setting for retry. The
documentation linked above states that the built-in default is 60
seconds.
Though Django reports this as a warning, clearly this configuration will
cause bugs such as tasks being executed multiple times (up to 5 retries
could be started while previous tasks may still finish).
The fix is to add a 'retry' setting to the settings file. Assuming that
the 300s timeout was deliberately chosen upstream, then setting the
retry interval to 360 would be sensible (= retry one minute after
timeout). A patch is attached.
** Affects: mailman-suite (Ubuntu)
Importance: Undecided
Status: New
** Tags: mantic
** Patch added: "Add retry setting to settings.py"
https://bugs.launchpad.net/bugs/2060293/+attachment/5761692/+files/settings.patch
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https://bugs.launchpad.net/bugs/2060293
Title:
mailman3-web needs Q_CLUSTER retry setting
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