[ https://issues.apache.org/jira/browse/MAPREDUCE-1397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Amareshwari Sriramadasu updated MAPREDUCE-1397: ----------------------------------------------- Attachment: patch-1397-ydist.txt Patch for yahoo! distribution with a couple of bug fixes in test case. > NullPointerException observed during task failures > -------------------------------------------------- > > Key: MAPREDUCE-1397 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1397 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: tasktracker > Affects Versions: 0.20.1 > Reporter: Ramya R > Assignee: Amareshwari Sriramadasu > Priority: Minor > Fix For: 0.22.0 > > Attachments: patch-1397-1.txt, patch-1397-2.txt, > patch-1397-ydist.txt, patch-1397.txt > > > In an environment where many jobs are killed simultaneously, NPEs are > observed in the TT/JT logs when a task fails. The situation is aggravated > when the taskcontroller.cfg is not configured properly. Below is the > exception obtained: > {noformat} > INFO org.apache.hadoop.mapred.TaskInProgress: Error from <attempt_ID>: > java.lang.Throwable: Child Error > at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:529) > Caused by: java.lang.NullPointerException > at > org.apache.hadoop.mapred.JvmManager$JvmManagerForType.getDetails(JvmManager.java:329) > at > org.apache.hadoop.mapred.JvmManager$JvmManagerForType.reapJvm(JvmManager.java:315) > at > org.apache.hadoop.mapred.JvmManager$JvmManagerForType.access$000(JvmManager.java:146) > at org.apache.hadoop.mapred.JvmManager.launchJvm(JvmManager.java:109) > at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:502) > {noformat} -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.