[HADOOP-5198] NPE in Shell.runCommand()

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.21.0
• Fix Version/s: 0.21.0
• Component/s: util
• Hadoop Flags: Reviewed
• Assignee: Amareshwari Sriramadasu
• Reporter: Amareshwari Sriramadasu
• Created: 09/Feb/09 10:47
• Updated: 24/Aug/10 20:35
• Resolved: 31/Mar/09 09:08

Description

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)