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https://issues.apache.org/jira/browse/HBASE-29770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18056556#comment-18056556
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Duo Zhang commented on HBASE-29770:
-----------------------------------
So for hadoop 3.x, we still need commons-logging and can not completely exclude
it...
> Exclude commons-logging from HBase
> ----------------------------------
>
> Key: HBASE-29770
> URL: https://issues.apache.org/jira/browse/HBASE-29770
> Project: HBase
> Issue Type: Improvement
> Components: logging
> Reporter: Istvan Toth
> Assignee: Istvan Toth
> Priority: Major
> Labels: pull-request-available
>
> We're already adding jcl-over-slf4j, which implements commons-logging and
> redirects it to SLF4j then to Log4j2.
> Having both jcl-over-slf4j and commons-logging on the classpath leads to
> classpath ordering dependent behavior.
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