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https://issues.apache.org/jira/browse/LOG4J2-3256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17461793#comment-17461793
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Dongjin Lee commented on LOG4J2-3256:
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[https://github.com/apache/logging-log4j2/pull/640] Here it is. I tested it
against Apache Kafka 2.8.1 and 3.0.0 and those previews will be released soon.
> Reduce ignored package scope of KafkaAppender
> ---------------------------------------------
>
> Key: LOG4J2-3256
> URL: https://issues.apache.org/jira/browse/LOG4J2-3256
> Project: Log4j 2
> Issue Type: Improvement
> Reporter: Dongjin Lee
> Priority: Major
>
> As of present, KafkaAppender ignores logging messages from the loggers
> starting with "org.apache.kafka". This is because KafkaAppender uses
> KafkaPoducer internally and to avoid recursive logging.
> However, the current ignored package scope, "org.apache.kafka", is too large,
> since KafkaProducer uses "org.apache.kafka.common" and
> "org.apache.kafka.client" only. It is problematic when Apache Kafka uses
> log4j2 for its logging.
> As of present, Apache Kafka is still using log4j 1.x, but a migration project
> is under-progress:
> * KAFKA-9366
> * KAFKA-12399
> If this project is taken, Apache Kafka will deprecate its log4j-appender and
> migrate into log4j2's KafkaAppender. Reducing the ignored package scope is a
> prior task to this work.
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