HPC Cluster maintenance next week (7/30)


Date: Fri, 24 Jul 2026 21:22:35 +0000
From: chtc-users@xxxxxxxxxxx
Subject: HPC Cluster maintenance next week (7/30)

Dear CHTC users


This message is for users of our HPC Cluster, logging into spark-login.chtc.wisc.edu


We will be performing maintenance on a key network component of the HPC cluster on Thursday, July 30 around 9am. 


Impacts to you: 

  • On Thursday, July 30, you will not be able to log in to spark-login between approximately 8 and 11am. 

  • Until July 30, new jobs will only start if their indicated runtime will complete before the maintenance window begins. Jobs with longer time requests will wait in the queue with the reason "ReqNodeNotAvail, Reserved for maintenance"

  • The file system and cluster nodes will remain up, and queued jobs should continue once the maintenance downtime has completed. 


We have entered the maintenance in our status page and will post updates there: https://status.chtc.wisc.edu/incidents/t5ns0tmy1g0x


Email us at chtc@xxxxxxxxxxx with any questions. 


Best,

Your CHTC team


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