[systemd-devel] Service fails to start with no log messages

[Jeffrey Walton]

On Mon, Jan 6, 2020 at 8:56 PM Reindl Harald <h.reindl at thelounge.net> wrote:
>
> Am 07.01.20 um 02:42 schrieb Jeffrey Walton:
> > On Mon, Jan 6, 2020 at 8:34 PM Reindl Harald <h.reindl at thelounge.net> wrote:
> >>
> >> Am 07.01.20 um 02:28 schrieb Jeffrey Walton:
> >>> I'm trying to determine my service fails to start. I copied the
> >>> service to the systemd unit directory, and then enabled and started
> >>> the service. Upon reboot the service is not started automatically.
> >>>
> >>> Here are the logs:
> >>
> >> Jan 06 20:25:33 raspberrypi systemd[1]: graphical.target: Job
> >> callboot-ui.service/start deleted to break ordering cycle starting
> >> with graphical.target/start
> >>
> >> you have some conflicting After/Before ordering which is impossible to
> >> solve automatically, it's that simple
> >
> > But there is no ordering problem. callboot-ui.service is not related
> > to callboot-monitor.service. callboot-ui.service is a Qt program and
> > front-end to the LCD screen. callboot-monitor.service is a command
> > line program that waits for reads of the modem.
> >
> > The only thing they have in common is they use the same database.
>
> frankly "to break ordering cycle starting with graphical.target" and
> your "callboot-monitor.service" has "Wants=graphical.target" and you
> call that "not releated"?
>
> Especially the "Wants" is problematic and noramlly not needed for
> enabled services, normally your only use After/NBefore unless there is a
> compelling resason for Wants/Requires and with growing useless
> dependencies you add to your units problems gow
>
> perfomance wise because you break parallel starts for no benefit and
> because of such unsolveable cycles if you obviously don't understand
> what you define becaus eotherwise you won't have After/Before/wants in
> combinations which are impossible
>
> and to your other post "5 seconds after all systems services have
> actually started" is something which simply don#t exist and can't exist
> at all
>
> fix your orderings and your problems are gone

To fix my ordering problem I need Systemd to stop lying about when the
network is ready.

I keep pushing it back because I can't get accurate information from Systemd.

Jeff