[systemd-devel] Under what condition would systemd not restart a target service.

[Virendra Negi]

I noticed a couple of days back that in the event of an apt-get update of
the target services, our services did not start.


Apparently, the service was in a sleeping state when it was upgraded. We
are also capturing the SIGTERM signal to do a graceful shutdown(when
systemctl tell us to stop) but since the service was sleeping for a
definite period the shutdown was delayed. (more than 90s) causing the
systemctl to kill the process by sending *SIGKILL. *

*We expected the systemctl to restart the update binary thereafter but it
didn't*

Trying to replicate the same thing behaviour thus far has been futile

[image: image.png]


I check the syslog but no helpful information can be derived

Jun  1 07:22:21 edge systemd[1]: Stopping A service which handles the
> interaction among other edge services...
> Jun  1 07:22:43 edge systemd[1]: Started Utility to generate JSON
> containing server statistics and health parameters.
> Jun  1 07:23:51 edge systemd[1]: sbagent.service: State 'stop-sigterm'
> timed out. Killing.
> Jun  1 07:23:51 edge systemd[1]: sbagent.service: Killing process 30165
> (sbagent) with signal SIGKILL.
> Jun  1 07:23:51 edge systemd[1]: sbagent.service: Main process exited,
> code=killed, status=9/KILL
> Jun  1 07:23:51 edge systemd[1]: sbagent.service: Failed with result
> 'timeout'.
> Jun  1 07:23:51 edge systemd[1]: Stopped A service which handles the
> interaction among other edge services.



I can say with confidence that the services binary both old and new were
not buggy and they did not crash on start / bootstrap

Hence I reaching out to understand if anyone else has seen this behaviour
and how can I reproduce it.


Thanks

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