[HADOOP-5516] TaskMemoryManagerThread crashes in a corner case

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.20.0
• Fix Version/s: 0.20.0
• Hadoop Flags: Reviewed
• Assignee: Vinod Kumar Vavilapalli Assign to me
• Reporter: Vinod Kumar Vavilapalli
• Created: 17/Mar/09 08:53
• Updated: 08/Jul/09 16:53
• Resolved: 18/Mar/09 13:23

Description

TT's stdout says.

Exception in thread "org.apache.hadoop.mapred.TaskMemoryManagerThread" java.lang.NullPointerException
        at org.apache.hadoop.util.ProcfsBasedProcessTree.getProcessTree(ProcfsBasedProcessTree.java:126)
        at org.apache.hadoop.mapred.TaskMemoryManagerThread.run(TaskMemoryManagerThread.java:200)

TaskMemoryManager crashes and no further memory management is done.