[KAFKA-16924] No log output when running kafka

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.9.0
• Assignee: Luke Chen
• Reporter: Luke Chen
• Created: 10/Jun/24 00:54
• Updated: 14/Jun/24 23:03
• Resolved: 11/Jun/24 00:44

Description

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:

> ./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.

 

Issue Links

• links to: GitHub Pull Request #16260