Darkstat exits on sleep

[kenn]

I am on Ubuntu 20.04 Mate desktop. I installed darkstat from official repo, its version `darkstat 3.0.719`
I enabled it as a systemd service. It starts well on boot. But I noticed that service exits when I put my laptop to sleep.
I tested if it exits on network down but it keeps running while computer is online.
I also noticed another weird thing, it starts two process

pstree -a -s -l -p -u | grep darkstat
  |-darkstat,42689,nobody -i wlp6s0 -p 666 --chroot /var/lib/darkstat --pidfile /var/run/darkstat.pid -b 127.0.0.1 -l 192.168.0.0/255.255.255.0 --daylog darkstat.log --import darkstat.db --export darkstat.db -f
  | `-darkstat,42690 -i wlp6s0 -p 666 --chroot /var/lib/darkstat --pidfile /var/run/darkstat.pid -b 127.0.0.1 -l 192.168.0.0/255.255.255.0 --daylog darkstat.log --import darkstat.db --export darkstat.db -f

[Emil Mikulic (darkmoon)]

The child process is expected, it's used for DNS resolution (so as not to block the main process, which is a select() loop)

Please run with --syslog and see if there's a smoking gun in the logs when darkstat stops.

[kenn (whatnext)]

@darkmoon Thank you for responding. There is nothing fancy in syslog:
2022-03-19 10:17:58 +0000|1647685078|486|377|6|6
# logging stopped at 2022-03-19 10:17:58 +0000 (1647685078)
# logging started at 2022-03-19 10:17:59 +0000 (1647685079)
2022-03-19 10:21:07 +0000|1647685267|294038|96563|394|419
# logging stopped at 2022-03-19 10:17:07 +0000 (1647685267)

I put it to suspend after 10:17 but it failed to restart it after resuming at 10:17

[Emil Mikulic (darkmoon)]

That's --daylog (which records bytes in/out per day), what you want is --syslog (which will hopefully record some kind of error, and will end up in /var/log/messages or similar)