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From "Karam Singh (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-734) java.util.ConcurrentModificationException observed in unreserving slots for HiRam Jobs
Date Wed, 08 Jul 2009 15:01:15 GMT
java.util.ConcurrentModificationException observed in unreserving slots for HiRam Jobs
--------------------------------------------------------------------------------------

                 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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