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https://issues.apache.org/jira/browse/SPARK-35701?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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L. C. Hsieh resolved SPARK-35701.
---------------------------------
Fix Version/s: 3.2.0
Resolution: Fixed
Issue resolved by pull request 32865
[https://github.com/apache/spark/pull/32865]
> Contention on SQLConf.sqlConfEntries and SQLConf.staticConfKeys
> ---------------------------------------------------------------
>
> Key: SPARK-35701
> URL: https://issues.apache.org/jira/browse/SPARK-35701
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.2
> Reporter: Haiyang Sun
> Assignee: Apache Spark
> Priority: Major
> Fix For: 3.2.0
>
>
> The global locks used to protect {{SQLConf.sqlConfEntries}} map and the
> {{SQLConf.staticConfKeys}} set can cause significant contention on the
> SQLConf instance in a concurrent setting.
> Using copy-on-write versions should reduce the contention given that
> modifications to the configs are relatively rare.
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