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https://issues.apache.org/jira/browse/MAPREDUCE-2997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated MAPREDUCE-2997:
-----------------------------------------------
Attachment: MAPREDUCE-2997-20110913.txt
This is because of a race in ContainerLauncher. I do see the synchronization
TODO I put long time back ;)
> MR task fails before launch itself with an NPE in ContainerLauncher
> -------------------------------------------------------------------
>
> Key: MAPREDUCE-2997
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2997
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: applicationmaster, mrv2
> Affects Versions: 0.23.0
> Reporter: Vinod Kumar Vavilapalli
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-2997-20110913.txt
>
>
> Exception found on the AM web UI while the application is running:
> {code}
> Container launch failed for container_1315908079531_0002_01_000387 :
> java.lang.NullPointerException
> at
> org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl.getCMProxy(ContainerLauncherImpl.java:162)
> at
> org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$EventProcessor.run(ContainerLauncherImpl.java:204)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> {code}
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