Parallel server jobmanager on debian bullseye does not start up after upgrade.

Running on debian 11.7:

huth@serifos:~$ sudo systemctl status mjs

● mjs.service - mjs, the mathworks job scheduler.

Loaded: loaded (/etc/systemd/system/mjs.service; enabled; vendor preset: enabled)

Active: active (running) since Mon 2023-05-22 15:39:31 CEST; 52min ago

Process: 687 ExecStart=/usr/local/mathworks/v2022b/toolbox/parallel/bin/mjs start (code=exited, status=0/SUCCESS)

Main PID: 2329 (mjsd)

Tasks: 36 (limit: 38090)

Memory: 249.0M

CPU: 18.972s

CGroup: /system.slice/mjs.service

├─2329 /usr/local/mathworks/v2022b/bin/glnxa64/mjsd /usr/local/mathworks/v2022b/toolbox/parallel/config/wrapper-phoenix.config wrapper.pidfile=/var/run/mjsd.pid

└─2332 /usr/local/mathworks/v2022b/sys/java/jre/glnxa64/jre/bin/java -Dcom.mathworks.toolbox.distcomp.base_port=27350 -Dcom.mathworks.toolbox.distcomp.matlabroot=/usr/local/mat>

Mai 22 15:39:18 serifos sudo[927]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=0)

Mai 22 15:39:18 serifos sudo[927]: pam_unix(sudo:session): session closed for user root

Mai 22 15:39:18 serifos sudo[933]: root : PWD=/usr/local/mathworks/v2022b/toolbox/parallel/bin ; USER=root ; COMMAND=/usr/bin/touch /var/lib/mjs/security/.mjstestfile

Mai 22 15:39:18 serifos sudo[933]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=0)

Mai 22 15:39:18 serifos sudo[933]: pam_unix(sudo:session): session closed for user root

Mai 22 15:39:31 serifos mjs[687]: Starting the MATLAB Parallel Server in the background.

Mai 22 15:39:31 serifos sudo[2327]: root : PWD=/usr/local/mathworks/v2022b/toolbox/parallel/bin ; USER=root ; COMMAND=/usr/bin/sh -c /usr/local/mathworks/v2022b/bin/glnxa64/mjsd /usr/l>

Mai 22 15:39:31 serifos sudo[2327]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=0)

Mai 22 15:39:31 serifos sudo[2327]: pam_unix(sudo:session): session closed for user root

Mai 22 15:39:31 serifos systemd[1]: Started mjs, the mathworks job scheduler..

huth@serifos:~$ sudo /usr/local/mathworks/v2022b/toolbox/parallel/bin/startjobmanager

The mjs service on the host

serifos.energietechnik.tu-berlin.de returned an error.

The cause of the problem is:

============================================================================

Unable to obtain the hostname of this computer.

This is causing:

Problem starting the job manager process.

============================================================================

huth@serifos:~$ hostname

serifos

huth@serifos:~$ hostname --fqdn

serifos.energietechnik.tu-berlin.de

huth@serifos:~$

Best regards

Frank Huth

[Edric Ellis]

It's hard to know quite what's going wrong without getting more data from your system. I suggest contacting MathWorks Installation Support who should be able to help you through this.

[Frank]

Thank you for your response.

Update:

While te 1st reboot after the debian upgrade left the mathworks frame work with the problem described above. A 2nd reboot brought up the complete frame work automatically again without the need to intervene. So I leave the issue there—though it remains misterious.