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13.8 Stuck Jobs

If a job gets stuck in Torque, try these suggestions to resolve the issue:

Use the qdel command to cancel the job.
Force the MOM to send an obituary of the job ID to the server.

> qsig -s 0 <JOBID>

You can try clearing the stale jobs by using the momctl command on the compute nodes where the jobs are still listed.

> momctl -c 58925 -h compute-5-20

Setting the qmgr server setting mom_job_sync to True might help prevent jobs from hanging.

> qmgr -c "set server mom_job_sync = True"

To check and see if this is already set, use:

> qmgr -c "p s"

If the suggestions above cannot remove the stuck job, you can try qdel -p. However, since the -p option purges all information generated by the job, this is not a recommended option unless the above suggestions fail to remove the stuck job.

> qdel -p <JOBID>

The last suggestion for removing stuck jobs from compute nodes is to restart the pbs_mom.

For additional troubleshooting, run a tracejob on one of the stuck jobs. You can then create an online support ticket with the full server log for the time period displayed in the trace job.