[LOG4J2-3256] Reduce ignored package scope of KafkaAppender

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.17.1
• Assignee: Gary D. Gregory
• Reporter: Dongjin Lee
• Created: 18/Dec/21 06:12
• Updated: 26/Dec/21 20:20
• Resolved: 26/Dec/21 13:59

Description

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.

Issue Links

• links to: GitHub Pull Request #640