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From "Jonathan Eagles (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TEZ-3115) Shuffle string handling adds significant memory overhead
Date Mon, 29 Feb 2016 16:59:18 GMT

     [ https://issues.apache.org/jira/browse/TEZ-3115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Eagles updated TEZ-3115:
---------------------------------
    Attachment: TEZ-3115.3.patch
                TEZ-3115.3-branch-0.7.patch

[~rajesh.balamohan], addressed the extra string construction. Also, refactored out the no
longer used constructBaseURIForShuffleHandler to remove an additional string constriction
for host:port. Let me know if this is sufficient. I don't think this introduces a backwards
compatibility issue.

> 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
>
>
> 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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