Public bug reported:
Ubuntu-15.10, amd64
systemd-225-1ubuntu9
transmission-daemon-2.84-1ubuntu1
I've noticed more than once, that "halt" can cause transmission-daemon
to loose it's settings. AFAIK, "halt" is not that different from
"poweroff" or "reboot" in regards to the shutdown sequence, so it is
probably a problem for those as well.
What I've noticed is that after my system comes back up after being
halted, transmission-daemon won't start, citing config issues. Looking
at /etc/transmission-daemon/settings.json, it's there but it's empty.
This does not happen every time, but I've seen it on at least 3
different occasions.
My guess (and I'm relatively new to systemd) is that while the
transmission-daemon systemd unit-file wants to start after
network.target, there is nothing that would prompt a "stop" of the
service during shutdown. This seems to leave a race where the
transmission-daemon is killed too close to remounting the / filesystem
read-only, giving the daemon enough time to truncate it's config, yet
making it impossible for the daemon to write it's settings, as it likes
to do on "stop".
My / filesystem is XFS, but that does not seem to have anything to do
with this.
I'm still looking for a way to map out the dependencies of systemd on
shutdown, but it seems to me that perhaps adding Require=network.target
to the unit-file might cause the daemon to stop early and solve this
issue.
Please let me know if you need anything else
** Affects: transmission (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1532552
Title:
transmission-daemon settings gone after system halt
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