I think we managed to fix the issue. Let me explain how.
Qluman was reporting an error: Traceback ...: ... File "/usr/lib/python3/dist-packages/qluman-14/client/qt/TreeWidget.py", line 538, in compute_gpu_details data["type"].index(gpu) TypeError: must be str, not NoneType
We asked ChatGPT for help and its reply seemed reasonable (check the chathttps://chatgpt.com/share/6a5e4636-b0dc-83eb-aff6-a3c2996277dd). In fact, I had been messing around with slurm gres configuration to fix a minor issue on a node with 2 different types of gpus. At some point I may have cleared the config, and when I tried to create a new one, I could no longer do that.
How we fixed: - We used mariadb to inspect the database. We found that some records in SlurmGresGroups table had type=NULL. - We updated those records to have the expected GPU types. - Restarted the `qluman-server` service on the head node. - Almost immediately Qluman started showing the nodes on the Enclosure view. We could also see the updated information on the slurm gres config window. - We checked the "Write files" window, confirmed the changes met our expectations, and committed them.
So, I cannot remember the exact details of the situatiom, but Qluman allowed me to do a change that led to an invalid state, which I could no longer revert.
Regards,
João Rodrigues
________________________________ From: João Rodrigues via Qlustar General qlustar-general@qlustar.org Sent: Sunday, July 19, 2026 16:14 To: qlustar-general@qlustar.org Subject: [Qlustar General] Stange Qluman quirks
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I recently upgraded our cluster from Qlustar 13 to 14. Since yesterday I noticed strange behaviors in Qluman GUI: 1. When using Hardware or GPU wizards, no nodes are shown in the "selected" list, even though I selected one in the "Enclosure view" window. 2. On the "Slurm Config" window, when creating a new "Gres group", I select a Type of GPU, but when pressing enter or tab, it is cleared. 3. Today, the "Enclosure view" is completely blank.
Since I noticed these problems yesterday, I have avoided writing changes to files.
What could be causing this?
João Rodrigues