tags 826044 unreproducible
thanks

Hi Axel,


Axel Beckert <a...@debian.org> writes:
> So it's actually debconf which fails to end needrestart cleanly as it
> did in my initial bug report.
>
> stracing debconf/frontend shows that it seems to wait for input on
> file descriptor 9:
>
> # strace -p 26405
> strace: Process 26405 attached
> read(9, 
>
> According to /proc/26405/fd/9 that's a pipe:
>
> lr-x------ 1 root root 64 Aug 16 20:41 /proc/26405/fd/9 -> pipe:[54970896]
>
> Looking for the other end of that pipe, it seems to be this process:
>
> l-wx------ 1 root root 64 Aug 16 20:41 /proc/32724/fd/1 -> pipe:[54970896]
>
> which belongs to this process:
>
> root     32724  0.0  0.0  47040  2496 ?        S    20:26   0:00 
> /usr/sbin/consolation
>
> Stopping the consolation service already sufficed to fix the hanging
> debconf and the needrestart zombie, at least in this case.
>
> Now the question is, where is the bug hidden?

good question. Could you check if needrestart has open pipes, too? Since
it was still to running (not beeing a zombie, wasn't it?) there should
be a pipe on STDOUT (and debconf on the other side).

> * Why does consolation influence debconf? Or does it influence
>   needrestart?
> * Could it be relevant, that needrestart/debconf ran inside a screen
>   session?

I don't think that screen could be the issue. From time to time I'm
upgrading more than hundret (Debian) machines having needrestart
installed using apt-dater (screen in the past, now tmux).

> * Could it be relevant, that I have gpm or consolelog installed, too?

I always use xterm(+tmux+ssh) - never tried consolation nor I'm using
gpm (used it decades ago). 

I've tagged this bug as unreproducible since I'm unable to trigger it
and nobody else reported a simular problem. Hopefully we can locate the
issue, soon.


Regards,
Thomas


> But then again, that bug hit me the first time when consolation wasn't
> yet in Debian at all. So just a coincidence?
>
>               Regards, Axel
> -- 
>  ,''`.  |  Axel Beckert <a...@debian.org>, http://people.debian.org/~abe/
> : :' :  |  Debian Developer, ftp.ch.debian.org Admin
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>

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