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https://issues.apache.org/jira/browse/TEZ-3115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15176305#comment-15176305
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Siddharth Seth commented on TEZ-3115:
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+1. Thanks [~jeagles]
Wasn't aware of the improvements to interning in Java7 etc. I supposed either
can be used in that case..
> Shuffle string handling adds significant memory overhead
> --------------------------------------------------------
>
> Key: TEZ-3115
> URL: https://issues.apache.org/jira/browse/TEZ-3115
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Jason Lowe
> Assignee: Jonathan Eagles
> Attachments: TEZ-3115.1.patch, TEZ-3115.2.patch,
> TEZ-3115.3-branch-0.7.patch, TEZ-3115.3.patch, TEZ-3115.4-branch-0.7.patch,
> TEZ-3115.4.patch
>
>
> While investigating the OOM heap dump from TEZ-3114 I noticed that the
> ShuffleManager and other shuffle-related objects were holding onto many
> strings that added up to over a hundred megabytes of memory.
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