bug#26931: GuixSD rebooting fails when tmux is running

[ludo@gnu.org (Ludovic Courtès)]

Clément Lassieur <clement@lassieur.org> skribis:

> Ludovic Courtès <ludo@gnu.org> writes:
>
>> Hi,
>>
>> Leo Famulari <leo@famulari.name> skribis:
>>
>>> On Sun, May 14, 2017 at 11:36:17PM +0200, Ludovic Courtès wrote:
>>>> What does /var/log/shepherd.log show around the time where you hit
>>>> “halt”?
>>>> 
>>>> I get something like this:
>>>> 
>>>> --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: (1 494)) 
>>> 2017-05-16 19:13:00 waiting for process termination (processes left: (1 494)) 
>>> 2017-05-16 19:13:02 waiting for process termination (processes left: (1 494)) 
>>> ------
>>>
>>> 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
>>
>> The bug was 100% reproducible in a VM, and AFAICS it is fixed by
>> 7f090203d5fb033eb1b64778b03afad5bb35f5f2.

[...]

> FYI I have the exact same problem with guix-publish: I have to do 'herd
> stop guix-publish', otherwise I can't reboot.  I'll report a bug soon.
> I would be interested to know if someone else reproduces it.

The commit above makes sure all child processes are reaped.  Could you
check whether that solves the problem you’re seeing with ‘guix publish’?

Thanks,
Ludo’.