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  1. Clear a hung (zombie) vnode 22-April-2014: PBS Pro version 12.0 installed on SLES 11 SP2 running on an SGI UV1000 Symptom: PBS Pro qstat reports a job or jobs in R state without a SessID or Elapsed Time. The job is not running on the OS nor is there an existing vnode cpuset, look in /dev/cpuset/PBSPro, there will not be a cpuset directory for the affected Job The qdel is ineffective How-to resolve: Use “qstat –r“ to list the affected jobs Use “qalter –r y PBS_JobID“ to mark the job rerunable You can check it is now marked rerunable, “qstat –f PBS_JobID | grep Rerunable” should return “Rerunable = True” Use “qrerun –W force PBS_JobID” to re-queue job You can check it is re-queued, “qstat –a” will list the job in Q state Use “qdel PBS_JobID” to terminate job Tips: Fixing several nodes at the same time, targeting a particular user: qstat –ru a_users_id qalter –r –y PBS_JobID_1 PBS_JobID_2 PBS_JobID_3 PBS_JobID_4 qstat –f PBS_JobID_1 PBS_JobID_2 PBS_JobID_3 PBS_JobID_4 | grep Rerunable qrerun –W force PBS_JobID_1 PBS_JobID_2 PBS_JobID_3 PBS_JobID_4 qstat –au a_users_id qdel PBS_JobID_1 PBS_JobID_2 PBS_JobID_3 PBS_JobID_4
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