RWTH High Performance Computing (HPC)

Due to latent bugs in resource accounting, ssh-ing into nodes where one of your own jobs is running is temporarily disabled.

We are aware of the popularity of this feature and aim to reenable it in a future maintenance.

With the new Rocky 9.8 updates done, we will next deploy cgroups v2 and re-enable ssh into compute nodes. The timeframe for this is still unfortunately unknown.

We have enforced the Slurm privacy settings and only personal jobs and settings can be seen now. Exceptions cannot be made

https://blog.rwth-aachen.de/itc-changes/en/2026/08/13/slurm-privacy-rules-enforced/

At the moment, $HOME is unavailable for some users at the CLAIX-2025 login nodes. The issue is currently under investigation.

Since all CLAIX-2025 nodes mount $HOME via NFS at the moment, also batch nodes can be affected. The tile was modified accordingly.

The issue has been resolved.

The filesystem problem leading to these issues also caused a variety of batch jobs to fail before their start and has likely caused problems for some jobs. If you have encountered failed job or ran jobs on Claix-2025, please evaluate the results and re-submit them as required.
Users that could log in to Claix-2025 during the time period of this incident were unaffected of the problems.

We hope to solve the problem today

still a few nodes are under maintenance, but the GPU partitons of CLAIX-20205 are open again

For urgent reasons, we need to update several components of the Slurm workload management system. This update will entail short periods of unavailability in which no new jobs can be submitted and no information on jobs can be queried from the system. We expect that the update will have no major impact on running jobs.

The update has been successful and to the best of our knowledge no running jobs were negatively affected by it.
We had to update at short notice to mitigate a security vulnerability disclosed today by SchedMD.