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https://issues.apache.org/jira/browse/SPARK-38541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen resolved SPARK-38541.
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Fix Version/s: 3.4.0
Resolution: Fixed
Issue resolved by pull request 35835
[https://github.com/apache/spark/pull/35835]
> Upgrade netty to 4.1.75
> -----------------------
>
> Key: SPARK-38541
> URL: https://issues.apache.org/jira/browse/SPARK-38541
> Project: Spark
> Issue Type: Improvement
> Components: Build
> Affects Versions: 3.3.0
> Reporter: Yang Jie
> Assignee: Yang Jie
> Priority: Minor
> Fix For: 3.4.0
>
>
> The release notes as follows:
> * [https://netty.io/news/2022/03/10/4-1-75-Final.html]
>
> There are 2 import change of this version:
> * Reduce the default PooledByteBufAllocator chunk size from 16 MiB to 4 MiB
> * Change default of io.netty.allocator.useCacheForAllThreads to false
>
> Both of these changes are to reduce memory-overhead
>
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