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https://issues.apache.org/jira/browse/SOLR-16878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17741719#comment-17741719
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ASF subversion and git services commented on SOLR-16878:
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Commit e402babac114fef8d9bef651c29ab5d9706603b0 in solr's branch
refs/heads/branch_9_3 from Houston Putman
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=e402babac11 ]
SOLR-16878: Add JUL Log4J manager for lucene logs (#1765)
- Explicitly invoke logging for experimental Lucene classes on Solr startup
(cherry picked from commit 8c3b093601c8a42a7d8170a054d34e2dabe09219)
> Include Lucene JUL logs with Solr logging
> -----------------------------------------
>
> Key: SOLR-16878
> URL: https://issues.apache.org/jira/browse/SOLR-16878
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: logging
> Affects Versions: 9.0
> Reporter: Houston Putman
> Priority: Blocker
> Fix For: 9.3
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> Starting with Lucene 9.1.0, Lucene now logs certain warnings and errors using
> Java Util Logging (JUL). Upgrade notes:
> https://lucene.apache.org/core/9_1_0/MIGRATE.html
> For Solr's Log4J setup to include these logs, we must follow Log4J's JUL
> instructions and set
> {{-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager}} when
> starting Solr. We will also need to include the {{log4j-jul}} jar in lib-ext
> with the other logging jars.
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