mythbackend does not terminate at computer shutdown

[Nigel Hathaway]

Binary package hint: dash

I think this may have something to do with the NVIDIA driver. I am running on a POV mboard with Atom 230 and Nvidia ION.

ProblemType: Bug
Architecture: i386
Date: Sat Mar 20 12:13:40 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /bin/dash
InstallationMedia: Mythbuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
NonfreeKernelModules: nvidia
OmitPids: 9141 9136 852 839
Package: dash 0.5.5.1-3ubuntu1
ProcCmdline: /bin/sh -e /proc/self/fd/8
ProcEnviron: PATH=(custom, no user)
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic-pae
SourcePackage: dash
Title: does not terminate at computer shutdown
Uname: Linux 2.6.32-16-generic-pae i686

[Mike Blackwood (blackwood)]

EEEPC 1000 I also had driver problems (mirrored video) when upgrading to alpha 3

[Leon Alvarez (locoxella)]

I have the same problem, and no nvidia card.

[MarcRandolph (mrand)]

On Bug 551277 (now marked as a dup of this bug), seemed to confirm that something similar to this was happening... mysql was being stopped, but the backend was not.

[MarcRandolph (mrand)]

Bug 559712 appears to have been reported in a different fashion and therefore contains a different set of logs.

[MarcRandolph (mrand)]

After making some test upstart jobs, I've convinced myself that the

stop on starting shutdown

line contained in /etc/init/mythtv-backend.conf can be changed to

stop on (starting shutdown or stopping mysql)

In my experiments, "stopping" clauses in upstart can refer to non-existent items. In other words, if mysql is not installed, this should still work fine. Only downside would be a unique config of a slave mythbackend on the same machine as a independent instance of mysql running for some other purpose. It seems to me that this is less likely than possible database corruption.

[Max Barry (max-maxbarry)]

> After making some test upstart jobs, I've convinced myself that the
>
> stop on starting shutdown
>
> line contained in /etc/init/mythtv-backend.conf can be changed to
>
> stop on (starting shutdown or stopping mysql)

Confirming this, I did the same thing independently a few weeks ago when I noticed mysql was stopping before mythtv-backend, which then produced errors. Haven't had a problem since.

I also tweaked my 'start' line. It looks like this:

start on (local-filesystems and net-device-up IFACE=lo and started mysql)
stop on (starting shutdown or stopping mysql)

This is on Mythbuntu 10.04.

[nZain (patrick-stalph)]

I can also confirm this on Ubuntu10.4 with MythTV 0.23. Similar to the not-waiting-for-udev bug, the additional condition "stopping mysql" is a good workaround for my use case (mysql server dedicated to mythtv).

Isn't there also a way to shutdown the backend manually? When using acpi wake-on-alarm & mythbackend's shutdown option, one could also add this command right before "sudo shutdown -h now", which is normally used. However, this may eventually fail since the backend stops itself before executing the final shutdown command? Wierd stuff :-)

[Mario Limonciello (superm1)]

Could someone affected please try the attached patch to see if it helps to rectify the problem? I think it should cause the backend to receive the shutdown signal a little bit earlier (and wait).

[Mario Limonciello (superm1)]

Marc:

I would generally agree with you, but we don't have a hard dependency on mysql currently because there is no such thing as a conditional job.

If the patch I posted above doesn't work, I do have another idea though.

We can have two different packages that own the upstart jobs:

mythtv-backend-master
mythtv-backend-slave

These packages would both conflict upon one another, but also both could resolve a dependency of mythtv-backend. The slave package would have a job that doesn't refer to mysql at all. The master package could have a job that depends on mysql for both shutdown and startup fixing the problems.

[Mario Limonciello (superm1)]

I've done some basic testing with that patch and seem to think it resolves the issue at hand. I haven't encountered any situations where i'm receiving errors about the backend not stopping anymore.

I've committed the patch to the packaging tree for -fixes and -trunk.
Anyone with the issue can update to the latest 0.24 or 0.25 autobuilds to receive the patch or manually modify their upstart job to include it.

[Launchpad Janitor (janitor)]

This bug was fixed in the package mythtv - 2:0.24.0+fixes.20101207.d3d2640-0ubuntu1

---------------
mythtv (2:0.24.0+fixes.20101207.d3d2640-0ubuntu1) natty; urgency=low

  [ Mario Limonciello ]
  * Modify the get-orig-source rule to use launchpadlib to try to fetch the file
    from the archive instead.
  * Stop on runlevels [016] rather than on the start of shutdown job. (LP: #542627)
  * Move packaging to git based commands.
  * If no themes are included, don't make bad theme stubs in debian/control.
  * Update control files.
  * Add an epoch because of the changing fixes->fixes and trunk->master to allow
    proper upgrades.
  * In ppa git checker helper, if no hash returned, don't error up.
  * If running on a master build, have the update-control-files rule recommends
    mythtv-dbg.
  * Update standards version.
  * Force pic support on as much of the build as possible. (LP: #684941)
  * Move mythweb's set -e into the script invokation to quiet lintian.
  * Add python dependency to mythtv-common.
  * Demote libmythtv-perl depends to recommends on mythtv-backend.
  * Don't run the permissions fix up on python files smaller than 1 block.
  * Fixup the extra docs cleanup for mythweb.
  * >>Upstream changes since last upload (11ee9c5):
  * [d3d2640] MythArchive: Update the script to look for the fonts in
    the new location.
  * [011ffd5] Fix file streaming to stay working past 4G
  * [ecbbcf8] Backport from master to fixes/0.24.
  * [fe9d48e] Move toLower to the correct location
  * [e4ea220] Add gitignores to fixes/0.24 too
  * [dc4868a] Tweak PWD in the Makefile to be more specific

  [ Thomas Mashos ]
  * Make mythplugins replace mythmovies
  * Make mythplugins replace mythmovies in debian/control.in
 -- Mario Limonciello <email address hidden> Tue, 07 Dec 2010 02:42:49 -0600