Bug#941121: upgrade to debian 9.11 removes config entry

[Alois Schlögl <alois.schloegl@ist.ac.at>]

Package: slurm-llnl
Version: 16.05.9-1
Severity: normal


[remark: this might be a problem of systemd, I'm not sure whether this
is an issue of slurm or of systemd.]

When upgrading from debian 9.10 to 9.11 [2], a configuration entry in
 /etc/systemd/system/multi-user.target.wants/slurmd.service
got lost.

In order to address an issue ("Cannot allocate memory" when running mpi
jobs under slurm, it is described in [1]) we had to add in
 /etc/systemd/system/multi-user.target.wants/slurmd.service

this entry

  [Service]
  ...
  LimitMEMLOCK=1000000000000


After upgrading to debian 9.11 [2] this entry configuration disappeared.
It took some time to identify the issue. The fix/workaround is to
manually add the entry in the configuration file again, and run
   systemctl daemon-reload
   systemctl restart slurmd

I'd have expected that the configuration is maintained when doing
  apt update && apt upgrade

Below is the system information from a machine that is not upgraded yet,
and it happens also on machines with Debian 9.10.

Thanks for considering.

  Alois


[1]
https://stackoverflow.com/questions/39512931/segfaults-when-running-openmpi-job-inside-slurm-runscript

[2] http://ftp.debian.org/debian/dists/stretch/ChangeLog




-- System Information:
Debian Release: 9.9
  APT prefers oldstable
  APT policy: (990, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-8-amd64 (SMP w/24 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages slurm-llnl depends on:
ii  slurm-wlm  16.05.9-1+deb9u2

slurm-llnl recommends no packages.

slurm-llnl suggests no packages.

-- no debconf information