Double check the actual running version. I had that when I tried to
start a too-new slurmd/sackd against an older slurmctld that was still
running.

Brian Andrus

On 6/15/2026 10:11 PM, allspace--- via slurm-users wrote:
> download slurm-26.05.1.tar.bz2 and build it on Ubuntu 22.04.5 LTS. Use it as controller node.
> download slurm-26.05.1.tar.bz2 and build it on Debian GNU/Linux 12. Use it as compute node(node-3).
>
> Run command "srun -w node-3 hostname" on controller node, got the following error message:
>
> srun: error: Task launch for StepId=10.0 failed on node node-3: Header lengths are longer than data received
> srun: error: Application launch failed: Header lengths are longer than data received
> srun: Job step aborted
>
> Here is the logs on node-3:
>
> [2026-06-16T12:45:20.645] error: _verify_signature: failed decode
> [2026-06-16T12:45:20.645] error: Malformed RPC of type REQUEST_LAUNCH_TASKS(6001) received
> [2026-06-16T12:45:20.653] error: slurm_unpack_msg_and_forward: [192.168.245.1:59308] failed: Header lengths are longer than data received
> [2026-06-16T12:45:20.663] error: wrap_on_data: [192.168.245.133:6818(fd:13)] on_data returned rc: Header lengths are longer than data received
>
> How can I fix this problem?
> Thanks
>

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