Hi Steffen,

that error is expected with a Slurm 24.11 client talking to a 22.05 controller — the RPC/protocol versions are simply too far apart. SchedMD generally recommends keeping Slurm components reasonably close in version, and upgrading the controller + client commands together (or controller first).

If upgrading the cluster isn’t an option yet, the most practical workaround is to run matching 22.05.x client tools on the Debian 13 submit node (e.g., build/package Slurm 22.05.8 from source for Trixie, or use a small Bookworm chroot/container with slurm-client). In general, I’d expect you’ll need client commands that match the controller’s major version as long as slurmctld stays on 22.05.


Best regards,
Rikka Göring (GenericRikka)
Maintainer, sysutils/slurm-wlm
FreeBSD HPC Modernization Project (unofficial)
https://kavocado.net

Von: Steffen Grunewald via slurm-users <slurm-users@lists.schedmd.com>
Gesendet: Freitag, 12. Dezember 2025 14:02
An: Slurm users <slurm-users@lists.schedmd.com>
Betreff: [slurm-users] Build 22.05.8 for Debian Trixie?
 
Good afternoon,

we're still running our HPC cluster on Debian 12 Bookworm, which comes with
Slurm 22.05.8 - no issues so far.
Yesterday, another machine was added as a submit node (slurm-client only),
with Debian 13 Trixie / Slurm 24.11.5.
Now on that the commands (sinfo etc.) don't work and the slurmctld logs
"Incompatible versions of client and server code".
Since upgrading the whole cluster is not an option yet: Has someone attempted
(and possibly succeeded) to build 22.05.8 (or 23.11.4? which IIRC would be
the last compatible one) for Trixie, and would be willing to share ideas?

Thanks,
 Steffen

--
Steffen Grunewald, Cluster Administrator
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Am Mühlenberg 1 * D-14476 Potsdam-Golm * Germany
~~~
Fon: +49-331-567 7274
Mail: steffen.grunewald(at)aei.mpg.de
~~~

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