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https://issues.apache.org/jira/browse/HADOOP-3581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12629079#action_12629079
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Vinod K V commented on HADOOP-3581:
-----------------------------------
org.apache.hadoop.fs.kfs.TestKosmosFileSystem.testDirs is unrelated
(HADOOP-4078).
Patch still applies cleanly to trunk(after HADOOP-3150), test-cases run
successfully. And I verified manually that this patch isn't disturbed anywhere
by HADOOP-3150. Committable.
> Prevent memory intensive user tasks from taking down nodes
> ----------------------------------------------------------
>
> Key: HADOOP-3581
> URL: https://issues.apache.org/jira/browse/HADOOP-3581
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Hemanth Yamijala
> Assignee: Vinod K V
> Attachments: HADOOP-3581-final.txt, HADOOP-3581.20080901.2.txt,
> HADOOP-3581.20080902.txt, HADOOP-3581.20080904.txt, HADOOP-3581.20080905.txt,
> HADOOP-3581.6.0.txt, patch_3581_0.1.txt, patch_3581_3.3.txt,
> patch_3581_4.3.txt, patch_3581_4.4.txt, patch_3581_5.0.txt, patch_3581_5.2.txt
>
>
> Sometimes user Map/Reduce applications can get extremely memory intensive,
> maybe due to some inadvertent bugs in the user code, or the amount of data
> processed. When this happens, the user tasks start to interfere with the
> proper execution of other processes on the node, including other Hadoop
> daemons like the DataNode and TaskTracker. Thus, the node would become
> unusable for any Hadoop tasks. There should be a way to prevent such tasks
> from bringing down the node.
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