[jira] [Resolved] (HIVE-24524) LLAP ShuffleHandler: upgrade to Netty4 and remove Netty3 dependency from hive where it's possible

["László Bodor (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-24524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

László Bodor resolved HIVE-24524.
---------------------------------
    Resolution: Fixed

> 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 50m
>  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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