chia7712 commented on code in PR #17373:
URL: https://github.com/apache/kafka/pull/17373#discussion_r1898534270


##########
build.gradle:
##########
@@ -1099,15 +1103,17 @@ project(':core') {
       implementation libs.dropwizardMetrics
       exclude module: 'slf4j-log4j12'
       exclude module: 'log4j'
-      // Both Kafka and Zookeeper use slf4j. ZooKeeper moved from log4j to 
logback in v3.8.0, but Kafka relies on reload4j.
+      // Both Kafka and Zookeeper use slf4j. ZooKeeper moved from log4j to 
logback in v3.8.0.
       // We are removing Zookeeper's dependency on logback so we have a 
singular logging backend.
       exclude module: 'logback-classic'
       exclude module: 'logback-core'
     }
     // ZooKeeperMain depends on commons-cli but declares the dependency as 
`provided`
     implementation libs.commonsCli
-
-    compileOnly libs.reload4j
+    implementation libs.log4j2Core
+    implementation libs.log4j2Api
+    implementation libs.log4j1Bridge2Api
+    implementation libs.jacksonDatabindYaml

Review Comment:
   > As far as I can tell, this is the way Log4jController worked in Kafka 3.x: 
if the optional ch.qos.reload4j dependency was absent, the class didn't work.
   
   Yes, you're right. Perhaps we should consider offering similar functionality 
for other popular SLF4J providers, such as Logback and JUL. @ijuma WDYT?



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