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https://issues.apache.org/jira/browse/TEZ-1596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14181953#comment-14181953
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Gopal V commented on TEZ-1596:
------------------------------
The actual fix needs to be made in YARN, to use a synchronized block per Mac
instance.
I posted a workaround which assumes HMACSha1 for all token signatures required
(the current standard).
> 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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