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https://issues.apache.org/jira/browse/KAFKA-16924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luke Chen resolved KAFKA-16924.
-------------------------------
Resolution: Fixed
> No log output when running kafka
> ---------------------------------
>
> Key: KAFKA-16924
> URL: https://issues.apache.org/jira/browse/KAFKA-16924
> Project: Kafka
> Issue Type: Bug
> Reporter: Luke Chen
> Assignee: Luke Chen
> Priority: Major
> Fix For: 4.0.0
>
>
> In [https://github.com/apache/kafka/pull/12148] , we removed log4jAppender
> dependency, and add testImplementation dependency for `slf4jlog4j` lib.
> However, we need this runtime dependency in tools module to output logs.
> ([ref]([https://stackoverflow.com/a/21787813])) Adding this dependency back.
>
> Note: The {{slf4jlog4j}} lib was added in {{log4j-appender}} dependency.
> Since it's removed, we need to explicitly declare it.
>
> Current output will be like this:
> {code:java}
> > ./gradlew clean jar
> > bin/kafka-server-start.sh config/kraft/controller.properties
> SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
> SLF4J: Defaulting to no-operation (NOP) logger implementation
> SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further
> details.{code}
>
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