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https://issues.apache.org/jira/browse/MAPREDUCE-3824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13201736#comment-13201736
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Allen Wittenauer commented on MAPREDUCE-3824:
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This appears to be related to two problems:
* race conditions around refcount
* private caches are never updated to reflect their true size
> Distributed caches are not removed properly
> -------------------------------------------
>
> Key: MAPREDUCE-3824
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3824
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distributed-cache
> Affects Versions: 1.0.0
> Reporter: Allen Wittenauer
> Priority: Critical
>
> Distributed caches are not being properly removed by the TaskTracker when
> they are expected to be expired.
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