From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#26931: GuixSD rebooting fails when tmux is running
Date: Wed, 17 May 2017 09:39:45 +0200
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References: <20170514193043.GA5396@jasmine> <87lgpzqfxq.fsf@gnu.org>
	<20170516231839.GA22678@jasmine>
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To: Leo Famulari <leo@famulari.name>
Cc: 26931@debbugs.gnu.org

Leo Famulari <leo@famulari.name> skribis:

> On Sun, May 14, 2017 at 11:36:17PM +0200, Ludovic Court=C3=A8s wrote:
>> What does /var/log/shepherd.log show around the time where you hit
>> =E2=80=9Chalt=E2=80=9D?
>>=20
>> I get something like this:
>>=20
>> --8<---------------cut here---------------start------------->8---
>> 18:06:26 Service mcron has been stopped.
>> 18:06:26 sending all processes the TERM signal
>
> For me, this is where it gets stuck:
>
> ------
> 2017-05-16 19:12:53 sending all processes the TERM signal
> 2017-05-16 19:12:58 waiting for process termination (processes left: (1 4=
94))=20
> 2017-05-16 19:13:00 waiting for process termination (processes left: (1 4=
94))=20
> 2017-05-16 19:13:02 waiting for process termination (processes left: (1 4=
94))=20
> ------
>
> In my experience, it will wait here forever.
>
> And from `ps aux`:
>
> leo        494  0.0  0.1  27232  3676 ?        Ss   19:12   0:00 tmux

Interesting.  The code for this is in (gnu services base).  It sends
SIGTERM, waits for a few seconds, and then sends SIGKILL, which
processes cannot survive AFAIK, and then enters that =E2=80=98wait=E2=80=99=
 loop.

This is on the bare metal and /etc/shepherd/do-not-kill does not exist,
right?

We could always add a round of SIGKILL in the =E2=80=98wait=E2=80=99 loop, =
but that
doesn=E2=80=99t sound right.  Does /var/log/messages contain any hints as t=
o why
tmux wasn=E2=80=99t terminated?

Thanks,
Ludo=E2=80=99.