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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3581) Prevent memory intensive user tasks from taking down nodes
Date Tue, 17 Jun 2008 12:03:46 GMT
Prevent memory intensive user tasks from taking down nodes
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                 Key: HADOOP-3581
                 URL: https://issues.apache.org/jira/browse/HADOOP-3581
             Project: Hadoop Core
          Issue Type: Improvement
          Components: mapred
            Reporter: Hemanth Yamijala


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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