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https://issues.apache.org/jira/browse/MAPREDUCE-5608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15581183#comment-15581183
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Akira Ajisaka commented on MAPREDUCE-5608:
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This patch still applies to trunk.

> Replace and deprecate mapred.tasktracker.indexcache.mb
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-5608
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5608
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 2.2.0
>            Reporter: Sandy Ryza
>            Assignee: Akira Ajisaka
>              Labels: BB2015-05-TBR, configuration, newbie
>         Attachments: MAPREDUCE-5608-002.patch, MAPREDUCE-5608.patch
>
>
> In MR2 mapred.tasktracker.indexcache.mb still works for configuring the size 
> of the shuffle service index cache.  As the tasktracker no longer exists, we 
> should replace this with something like mapreduce.shuffle.indexcache.mb. 



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