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https://issues.apache.org/jira/browse/KAFKA-18804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17927462#comment-17927462
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TengYao Chi commented on KAFKA-18804:
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Feel free to ping me once you have a patch for it :)
> Remove slf4j warning when using tool script.
> --------------------------------------------
>
> Key: KAFKA-18804
> URL: https://issues.apache.org/jira/browse/KAFKA-18804
> Project: Kafka
> Issue Type: Improvement
> Reporter: TengYao Chi
> Assignee: Jhen-Yung Hsu
> Priority: Minor
>
> Currently, when running tools scripts, we encounter multiple SLF4J binding
> warnings:
> ```
> SLF4J: Class path contains multiple SLF4J bindings.
> SLF4J: Found binding in
> [jar:file:/home/yungh/kafka/kafka_fork/kafka_test/core/build/dependant-libs-2.13.15/log4j-slf4j-impl-2.24.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in
> [jar:file:/home/yungh/kafka/kafka_fork/kafka_test/tools/build/dependant-libs-2.13.15/log4j-slf4j-impl-2.24.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an
> explanation.
> SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
> ```
>
> This issue occurs because we have included multiple SLF4J implementation
> libraries in the project. We can resolve this by modifying the
> `copyDependantLibs` task in gradle.
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