java.util.ConcurrentModificationException observed in unreserving slots for
HiRam Jobs
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Key: MAPREDUCE-734
URL: https://issues.apache.org/jira/browse/MAPREDUCE-734
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: contrib/capacity-sched
Reporter: Karam Singh
Ran jobs out which 3 were HiRAM, the job were not removed from scheduler queue
even after they successfully completed
hadoop queue -info queue -showJobs displays somwthing like -:
job_200907080724_0031 2 1247059146868 username NORMAL 0 running map
tasks using 0 map slots. 0 additional slots reserved. 0 running reduce tasks
using 0 reduce slots. 60 additional slots reserved.
job_200907080724_0030 2 1247059146972 username NORMAL 0 running map
tasks using 0 map slots. 0 additional slots reserved. 0 running reduce tasks
using 0 reduce slots. 60 additional slots reserved.
But it does not block anything, but seems like zombie process of system
Jobtracker log show java.util.ConcurrentModificationException
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