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https://issues.apache.org/jira/browse/HIVE-24524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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László Bodor updated HIVE-24524:
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Fix Version/s: 4.0.0
> LLAP ShuffleHandler: upgrade to Netty4 and remove Netty3 dependency from hive
> where it's possible
> -------------------------------------------------------------------------------------------------
>
> Key: HIVE-24524
> URL: https://issues.apache.org/jira/browse/HIVE-24524
> Project: Hive
> Issue Type: Improvement
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: dep.log
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> Tez already has a WIP patch for upgrading its shuffle handler to netty4.
> Netty4 is a possible performance improvement compared to Netty3. However, the
> refactor is not trivial, TEZ-4157 covers that more or less (the code bases
> are very similar).
> Background:
> netty4 migration guideline:
> https://netty.io/wiki/new-and-noteworthy-in-4.0.html
> articles of possible performance improvement:
> https://blog.twitter.com/engineering/en_us/a/2013/netty-4-at-twitter-reduced-gc-overhead.html
> https://developer.squareup.com/blog/upgrading-a-reverse-proxy-from-netty-3-to-4/
> some other notes: Netty3 is EOL since 2016:
> https://netty.io/news/2016/06/29/3-10-6-Final.html
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