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Date: Thu, 31 Jul 2008 23:48:31 -0700 (PDT)
From: "Vinod Kumar Vavilapalli (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-3581) Prevent memory intensive user tasks
 from taking down nodes
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     [ https://issues.apache.org/jira/browse/HADOOP-3581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod Kumar Vavilapalli updated HADOOP-3581:
--------------------------------------------

    Status: Open  (was: Patch Available)

> 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 Kumar Vavilapalli
>         Attachments: patch_3581_0.1.txt, patch_3581_3.3.txt, patch_3581_4.3.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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