slurmdbd is not a requirement to get things started [1], but you'll probably want it later.
It’s possible you’ve got host-based firewall rules on either system that are blocking communication. If you’re using firewalld, ufw, or something similar, stop their services, restart the slurmd and slurmctld services, and see if that helps.
Level II: Internal
From: Dhumal, Dr. Nilesh via slurm-users <slurm-users@lists.schedmd.com>
Date: Saturday, September 20, 2025 at 11:02 AM
To: Slurm User Community List <slurm-users@lists.schedmd.com>
Subject: [slurm-users] Compute node not responding
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Hello,
Recently, we installed slum 25 on our cluster. We are not monitoring the user's account. We didn't configure the sql database on the head node. We are running slurmcld on head node and slumd on the compute node.
We are getting the following error
Head node: compute node not responding.
Compute node:
2025-09-19T15:30:23.461] error: Unable to register: Unable to contact slurm controller (connect failure)
Do we need to run slumdbd on the head node?
I checked the network connection by pinging the compute node from the head node.
Do you have any suggestions to resolve this issue?
Thanks
Nilesh