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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TEZ-1596) Secure Shuffle utils is extremely expensive for fast queries
Date Thu, 23 Oct 2014 09:23:34 GMT

    [ https://issues.apache.org/jira/browse/TEZ-1596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14181161#comment-14181161
] 

Rajesh Balamohan commented on TEZ-1596:
---------------------------------------

For every connection response, tez carries out a validate() and it internally uses generateByteHash
as well.  So the fix would help both setupConnection() and validate().
{code}
SecureShuffleUtils.verifyReply(replyHash, encHash, jobTokenSecret);
{code}

> Secure Shuffle utils is extremely expensive for fast queries
> ------------------------------------------------------------
>
>                 Key: TEZ-1596
>                 URL: https://issues.apache.org/jira/browse/TEZ-1596
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.6.0
>            Reporter: Gopal V
>         Attachments: TEZ-1596.hack.patch, shuffle-secure-drilldown.png, shuffle-secure.png
>
>
> Generating the hash for YARN's secure shuffle is more expensive than the actual HTTP
call once keep-alive is turned on.
> !shuffle-secure.png!



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