Bug#964438: apt-listbugs: dns error when running from cron job

[Francesco Poli]

On Sun, 26 Jul 2020 22:06:23 +0200 Michael Biebl wrote:

> Am 26.07.20 um 21:36 schrieb Francesco Poli:
[...]
> > Dear Michael,
> > I am still convinced that this is a bug in systemd, as explained above.
> > I am reassigning back the bug report to package systemd.
> > 
> > If you think that the timer unit can be modified so that it behaves as
> > intended, please tell me how I should modify it.
> > Just to recap the intended behavior: the timer should trigger the
> > corresponding oneshot service 5 min after the timer activation and then
> > hourly, with a random delay between 0 and 20 min, *without* catching up
> > with missed execution chances, and it should *not* trigger the service
> > immediately during a wake-up from sleep.
> 
> Maybe this is a misunderstanding.

It's possible. And it may well be on my side.
Let's try and clarify...

> Persistent=true is relevant when you
> reboot/power down a system. In your case, the system is suspended and
> woken up again.

Exactly!
So why does it trigger *immediately* during wake-up?

Was the timer inactive during sleep and then re-activated during
wake-up?
If this is the case, then it should wait at least 5 min
(OnActiveSec=5min) or trigger on the basis of the calendar scheduling
(OnCalendar=*-*-* *:20) with a random delay (RandomizedDelaySec=20min).

Was the timer still considered active during sleep?
If this is the case, then the OnActiveSec=5min trigger should not
happen at all during wake-up and the timer should just trigger on the
basis of the calendar scheduling (OnCalendar=*-*-* *:20) with a random
delay (RandomizedDelaySec=20min).

Yet, the timer triggers during each wake-up, without waiting.
This is why I think the bug is in systemd.



-- 
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 There's not a second to spare! To the laboratory!
..................................................... Francesco Poli .
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