I should be clear, the JobArrayTaskLimit isn’t the issue (the user’s submitted with %1, which is why we’re getting that).  What I don’t understand is why the jobs remaining in the queue have no priority at all associated with them.  It’s as though the scheduler has forgotten the job array exists altogether.

 

Tim

 

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Tim Cutts

Scientific Computing Platform Lead

AstraZeneca

 

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From: Ole Holm Nielsen via slurm-users <slurm-users@lists.schedmd.com>
Date: Monday, 7 October 2024 at 10:35 AM
To: slurm-users@lists.schedmd.com <slurm-users@lists.schedmd.com>
Subject: [slurm-users] Re: Jobs not getting scheduled, no priority calculation, but still in queue?

Hi Tim,

On 10/7/24 11:13, Cutts, Tim via slurm-users wrote:
> Something odd is going on on our cluster.  User has a lot of pending jobs
> in a job array (a few thousand).
>
> squeue -u kmnx005 -r -t PD | head -5
>
>               JOBID PARTITION     NAME     USER ST       TIME  NODES
> NODELIST(REASON)
>
>         3045324_875      core run_scp_  kmnx005 PD       0:00      1
> (JobArrayTaskLimit)
>
>         3045324_876      core run_scp_  kmnx005 PD       0:00      1
> (JobArrayTaskLimit)
>
>         3045324_877      core run_scp_  kmnx005 PD       0:00      1
> (JobArrayTaskLimit)
>
>         3045324_878      core run_scp_  kmnx005 PD       0:00      1
> (JobArrayTaskLimit)
>
> None are getting scheduled.  But when I ask SLURM what that job’s priority
> is, it produces no output:
>
> $ sprio -j 3045324
>
>            JOBID PARTITION   PRIORITY       SITE        AGE  FAIRSHARE   
> JOBSIZE  PARTITION        QOS                 TRES
>
> Any clues what’s going on here?
What array limits do you have in slurm.conf?  For example:

$ scontrol show config | grep -i array
MaxArraySize            = 1001

/Ole



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