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 chat). 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,
Joćo Rodrigues
From: Joćo 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?
Joćo Rodrigues