NPE in ProcfsBasedProcessTree.destroy()
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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 TestTaskTrackerMemoryManager.
{code}
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)
{code}
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