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https://issues.apache.org/jira/browse/SPARK-33495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-33495:
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Assignee: (was: Apache Spark)
> jcl-over-slf4j conflicts with commons-logging.jar
> -------------------------------------------------
>
> Key: SPARK-33495
> URL: https://issues.apache.org/jira/browse/SPARK-33495
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core, SQL
> Affects Versions: 2.4.7, 3.0.0, 3.0.1
> Reporter: lrz
> Priority: Minor
>
> spark had introduces jcl-over-slf4j as the bridge between commons-logging and
> slf4j. And refer to:
> [https://jira.qos.ch/browse/SLF4J-250?page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel]
> [http://www.slf4j.org/legacy.html]
> because jcl-over-slf4j.jar contains duplicates classes with
> commons-logging.jar, so it's better to remove the dependency of
> commons-logging.
> And we also find one deadlock issue cause by jcl-over-slf4j.jar and
> commons-logging.jar coexistence. this issue happen during the cinit of
> LogFactory and SLF4JlogFactory
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