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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5198) NPE in Shell.runCommand()
Date Mon, 09 Feb 2009 10:48:59 GMT
NPE in Shell.runCommand()
-------------------------

                 Key: HADOOP-5198
                 URL: https://issues.apache.org/jira/browse/HADOOP-5198
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred, util
    Affects Versions: 0.21.0
            Reporter: Amareshwari Sriramadasu
             Fix For: 0.21.0


I have seen one of the task failures with following exception:
java.lang.NullPointerException
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:441)
	at org.apache.hadoop.util.Shell.runCommand(Shell.java:149)
	at org.apache.hadoop.util.Shell.run(Shell.java:134)
	at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:286)
	at org.apache.hadoop.util.ProcessTree.isAlive(ProcessTree.java:244)
	at org.apache.hadoop.util.ProcessTree.sigKillInCurrentThread(ProcessTree.java:67)
	at org.apache.hadoop.util.ProcessTree.sigKill(ProcessTree.java:115)
	at org.apache.hadoop.util.ProcessTree.destroyProcessGroup(ProcessTree.java:164)
	at org.apache.hadoop.util.ProcessTree.destroy(ProcessTree.java:180)
	at org.apache.hadoop.mapred.JvmManager$JvmManagerForType$JvmRunner.kill(JvmManager.java:377)
	at org.apache.hadoop.mapred.JvmManager$JvmManagerForType.reapJvm(JvmManager.java:249)
	at org.apache.hadoop.mapred.JvmManager$JvmManagerForType.access$000(JvmManager.java:113)
	at org.apache.hadoop.mapred.JvmManager.launchJvm(JvmManager.java:76)
	at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:411)



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