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From "Vivek Ratan (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4523) Enhance how memory-intensive user tasks are handled
Date Mon, 27 Oct 2008 06:48:44 GMT
Enhance how memory-intensive user tasks are handled

                 Key: HADOOP-4523
                 URL: https://issues.apache.org/jira/browse/HADOOP-4523
             Project: Hadoop Core
          Issue Type: Improvement
            Reporter: Vivek Ratan

HADOOP-3581 monitors each Hadoop task to see if its memory usage (which includes usage of
any tasks spawned by it and so on) is within a per-task limit. If the task's memory usage
goes over its limit, the task is killed. This, by itself, is not enough to prevent badly behaving
jobs from bringing down nodes. What is also needed is the ability to make sure that the sum
total of VM usage of all Hadoop tasks does not exceed a certain limit.

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