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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6232) NPE in ProcfsBasedProcessTree.destroy()
Date Wed, 02 Sep 2009 11:22:32 GMT
NPE in ProcfsBasedProcessTree.destroy()

                 Key: HADOOP-6232
                 URL: https://issues.apache.org/jira/browse/HADOOP-6232
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Vinod K V
            Priority: Minor

This causes the following exception in TaskMemoryManagerThread. I observed this while running
2009-09-02 12:08:25,835 WARN  mapred.TaskMemoryManagerThread (TaskMemoryManagerThread.java:run(239))
- Uncaught exception in TaskMemoryManager while managing memory of attempt_20090902120812252_0001_m_000003_0
: java.lang.NullPointerException
        at org.apache.hadoop.util.ProcfsBasedProcessTree.assertPidPgrpidForMatch(ProcfsBasedProcessTree.java:234)
        at org.apache.hadoop.util.ProcfsBasedProcessTree.assertAndDestroyProcessGroup(ProcfsBasedProcessTree.java:257)
        at org.apache.hadoop.util.ProcfsBasedProcessTree.destroy(ProcfsBasedProcessTree.java:286)
        at org.apache.hadoop.mapred.TaskMemoryManagerThread.run(TaskMemoryManagerThread.java:229)

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