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https://issues.apache.org/jira/browse/MAPREDUCE-1228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12780846#action_12780846
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Chris Douglas commented on MAPREDUCE-1228:
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Is this a duplicate of MAPREDUCE-1182?
> OutOfMemoryErrors in ReducerTask due to int overflow on >2G RAM tasks
> ---------------------------------------------------------------------
>
> 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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