Public bug reported:
I've been checking some apparently random dep8 failures in munin that
are annoying, and I think I have identified one class of errors.
The failure is that /var/cache/munin/www/ isn't empty, but the test
cleans it like this:
# set up clean env for testing the scripts
service cron stop
rm -rf /var/cache/munin/www/*
Whenever the munin-cron test fails, I noticed it's close to the */5 cron
mark. I suspect a cron job might be running already when cron is
stopped.
Here are some samples of when this test failed:
autopkgtest [06:05:05]: test master-cron: [-----------------------
autopkgtest [15:25:08]: test master-cron: [-----------------------
autopkgtest [17:00:10]: test master-cron: [-----------------------
When it passed:
autopkgtest [16:31:56]: test master-cron: [-----------------------
autopkgtest [20:23:58]: test master-cron: [-----------------------
autopkgtest [14:25:54]: test master-cron: [-----------------------
But there are also outliers for when it passed:
autopkgtest [00:02:07]: test master-cron: [-----------------------
autopkgtest [09:44:10]: test master-cron: [-----------------------
It's probably worth it to enhance this test by also killing some munin scripts.
The cron.d file specifies:
*/5 * * * * munin if [ -x /usr/bin/munin-cron ]; then /usr/bin/munin-cron;
fi
munin-cron runs:
munin-update
munin-limits
munin-html
munin-graph
I suggest a killall for these processes right after stopping the cron
service, and before the rm -rf /var/cache/munin/www/* and starting the
tests.
** Affects: munin (Ubuntu)
Importance: Undecided
Status: New
** Tags: dep8 update-excuse
** Tags added: update-excuse
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https://bugs.launchpad.net/bugs/1865938
Title:
DEP8: master-cron can fail if started close to */5
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