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https://issues.apache.org/jira/browse/TIKA-3842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17597342#comment-17597342
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Hudson commented on TIKA-3842:
------------------------------
SUCCESS: Integrated in Jenkins build Tika ยป tika-main-jdk8 #763 (See
[https://ci-builds.apache.org/job/Tika/job/tika-main-jdk8/763/])
TIKA-3842 -- revert slf4j until there's a compatible log4j2 bridge. (tallison:
[https://github.com/apache/tika/commit/f534a5e8ac85fd1443319095c3b23cea92e8de53])
* (edit) tika-parent/pom.xml
> Revert slf4j core back to 1.x?
> ------------------------------
>
> Key: TIKA-3842
> URL: https://issues.apache.org/jira/browse/TIKA-3842
> Project: Tika
> Issue Type: Improvement
> Affects Versions: 2.4.2
> Reporter: Tim Allison
> Priority: Minor
>
> We're now getting warnings after the upgrade from slf4j 1.x to 2.x:
> {noformat}
> SLF4J: No SLF4J providers were found.
> SLF4J: Defaulting to no-operation (NOP) logger implementation
> SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.
> SLF4J: Class path contains SLF4J bindings targeting slf4j-api versions prior
> to 1.8.
> SLF4J: Ignoring binding found at
> [jar:file:/home/tallison/.m2/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.18.0/log4j-slf4j-impl-2.18.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: See http://www.slf4j.org/codes.html#ignoredBindings for an explanation.
> {noformat}
> These are explained here: https://www.slf4j.org/codes.html with some further
> explanation here: https://www.slf4j.org/faq.html#changesInVersion200
> I think the underlying issue is that there isn't yet a log4j2 bridge for
> slf4j 2.x: https://issues.apache.org/jira/browse/LOG4J2-3139
> Should we revert slf4j back to 1.x until this is resolved?
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