touch-packages team mailing list archive

[Martin Pitt <martin.pitt@xxxxxxxxxx>]

(In reply to Simon McVittie from comment #6)
> How's this? I made the stop command be "echo" instead of "true" so that it
> leaves a hint in systemctl status if someone tries to stop it by hand.

Ah, good one.
 
> Unfortunately, "systemctl restart dbus" (which was never supported either)
> will now start a second dbus-daemon in parallel with the first, and in my
> testing, the second one will get all new connections. Any ideas for how to
> avoid that? Perhaps it would be better to make the stop command exit
> nonzero? ... but then we'd log scary messages during a normal shutdown,
> which is no better really.

Right, I don't like making it fail on stop. I don't see anything
explicit which would declare "cannot restart"; I haven't tested this
(travelling/no real computer), but would something like

    ConditionPathExists=!/run/dbus/system_bus_socket

prevent further starts/restarts? I'm not sure if conditions are
evaluated on start only, or on restart too -- my gut feeling is the
former, i. e. that won't work.

Thanks!

BTW, this is being discussed on the upstream ML too:

http://lists.freedesktop.org/archives/systemd-
devel/2015-April/030070.html

(I haven't caught up with that yet)

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https://bugs.launchpad.net/bugs/1438612

Title:
  remote file systems hang on shutdown, D-BUS stops too early

Status in D-Bus:
  Confirmed
Status in dbus package in Ubuntu:
  Fix Released

Bug description:
  (part of bug 1431774). During shutdown, D-Bus stops too early. In
  particular, it stops before NetworkManager and remote-fs.target,  so
  that any network unmount  will cause errors and hang the boot. This
  can be seen with

  $ journalctl -b -1 | egrep 'Stop.*(D-Bus|Network M|Remote F)'
  Mär 30 19:05:19 donald systemd[1]: Stopping D-Bus System Message Bus...
  Mär 30 19:05:19 donald systemd[1]: Stopped D-Bus System Message Bus.
  Mär 30 19:05:19 donald systemd[1]: Stopped target Remote File Systems.
  Mär 30 19:05:19 donald systemd[1]: Stopping Remote File Systems.
  Mär 30 19:05:19 donald systemd[1]: Stopped target Remote File Systems (Pre).
  Mär 30 19:05:19 donald systemd[1]: Stopping Remote File Systems (Pre).
  Mär 30 19:05:19 donald systemd[1]: Stopping Network Manager...
  Mär 30 19:05:42 donald systemd[1]: Stopped Network Manager.
  Mär 30 19:05:42 donald systemd[1]: Stopping D-Bus System Message Bus Socket.

  A quick workaround is to add After=dbus.service to
  /lib/systemd/system/NetworkManager.service's [Unit] section, but this
  should be fixed in a more general fashion.

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