Bug#718446: tracker-extract possibly prevents shutdown to complete

[Vincent Lefevre]

On 2013-07-31 23:41:49 +0200, Sebastian Niehaus wrote:
> Am 31.07.2013 23:15, schrieb Michael Biebl:
> 
> >> I suppose the other processes regarding NFS are okay to be running after 
> >> /etc/init.d/sendsigs but tracker-extract should have been finished. 
> > 
> > Are you using NFS for your $HOME directory?
> 
> No, $HOME is on the maschine's local disk.
> 
> The NFS file system however is mounted into one user's home like
> 
> /home/user1/nfs

IMHO, the process should stop immediately at shutdown and not try
to finish its task first.

When I upgraded a machine from stable to testing in December 2023,
tracker-extract was also preventing the shutdown (always, AFAIK),
and I had no NFS, just the local disk. However, in my case,
tracker-extract (gst-plugin-scan) was yielding a crash in nouveau

2023-12-19T03:10:02.176832+01:00 qaa tracker-extract-3[1967]: nvc0_screen_create:1077 - Error allocating PGRAPH context for M2MF: -16
2023-12-19T03:10:02.177550+01:00 qaa kernel: ------------[ cut here ]------------
2023-12-19T03:10:02.177568+01:00 qaa kernel: nouveau 0000:01:00.0: timeout
[...]
2023-12-19T03:10:02.177710+01:00 qaa kernel: CPU: 3 PID: 1967 Comm: gst-plugin-scan Tainted: G        W          6.5.0-5-amd64 #1  Debian 6.5.13-1

and gst-plugin-scan even survived SIGKILL:

[...]
2023-12-19T03:13:06.240298+01:00 qaa systemd[2079]: tracker-extract-3.service: State 'final-sigterm' timed out. Killing.
2023-12-19T03:13:06.240435+01:00 qaa systemd[2079]: tracker-extract-3.service: Killing process 2150 (gst-plugin-scan) with signal SIGKILL.
2023-12-19T03:13:40.973708+01:00 qaa kernel: INFO: task gst-plugin-scan:2150 blocked for more than 120 seconds.
2023-12-19T03:13:40.973803+01:00 qaa kernel:       Tainted: G        W          6.5.0-5-amd64 #1 Debian 6.5.13-1
2023-12-19T03:13:40.973810+01:00 qaa kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
2023-12-19T03:13:40.973816+01:00 qaa kernel: task:gst-plugin-scan state:D stack:0     pid:2150  ppid:2079   flags:0x00000006
[...]
2023-12-19T03:14:36.240345+01:00 qaa systemd[2079]: tracker-extract-3.service: Processes still around after final SIGKILL. Entering failed mode.
[...]

So perhaps in this particular case, there was nothing that could
be done on the tracker-extract side, but I'm wondering.

Since then, the nouveau issue has been fixed, but I had removed
tracker-extract earlier, and I didn't try again to see whether
the problem was solved about it.

-- 
Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)