NPE in Shell.runCommand()
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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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