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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1228) OutOfMemoryErrors in ReducerTask due to int overflow on >2G RAM tasks
Date Sat, 21 Nov 2009 00:21:39 GMT
OutOfMemoryErrors in ReducerTask due to int overflow on >2G RAM tasks
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                 Key: MAPREDUCE-1228
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1228
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: task
    Affects Versions: 0.20.1
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


The ReduceTask RAMManager uses ints for tracking amounts of memory. For tasks with >2G
RAM allocated, these can overflow and cause memory usage to become incorrectly tracked and
run away.

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