Ticket 16704

Summary: After upgrading to 23.02 SLURM_NTASKS is no longer set unless --ntasks is specified
Product: Slurm Reporter: Todd Merritt <tmerritt>
Component: slurmctldAssignee: Marshall Garey <marshall>
Status: RESOLVED INFOGIVEN QA Contact:
Severity: 4 - Minor Issue    
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Version: 23.02.0   
Hardware: Linux   
OS: Linux   
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Description Todd Merritt 2023-05-11 12:33:38 MDT 
Previously, that environment variable was always set in jobs and the lua variable job_desc.num_tasks always had a value in our job submit plugin. After upgrading from 22.05 to 23.02 though both values are undefined unless --ntasks is defined.
Comment 1 Marshall Garey 2023-05-11 12:49:23 MDT 
This was an intentional change to fix a bug. See:

https://bugs.schedmd.com/show_bug.cgi?id=16278#c2
https://github.com/SchedMD/slurm/commit/ef513023ad87a3870bf575efd2329672819c59f0



Unrelated: we have fixed many bugs in 23.02.0 and 23.02.1, including fixing stability issues and fixing an issue that broke mpirun in 23.02. So I encourage you to upgrade to 23.02.2.
Comment 2 Todd Merritt 2023-05-11 13:42:10 MDT 
Thanks for the info!