chia7712 commented on code in PR #19371:
URL: https://github.com/apache/kafka/pull/19371#discussion_r2101615974


##########
core/src/main/scala/kafka/raft/KafkaMetadataLog.scala:
##########
@@ -589,8 +589,9 @@ object KafkaMetadataLog extends Logging {
   ): KafkaMetadataLog = {
     val props = new Properties()
     props.setProperty(TopicConfig.MAX_MESSAGE_BYTES_CONFIG, 
config.maxBatchSizeInBytes.toString)
-    props.setProperty(TopicConfig.SEGMENT_BYTES_CONFIG, 
config.logSegmentBytes.toString)
-    props.setProperty(TopicConfig.SEGMENT_MS_CONFIG, 
config.logSegmentMillis.toString)
+    // Since MetadataLogConfig validates the log segment size using a minimum 
allowed value,
+    // we can safely use `internal.segment.bytes` to configure it instead of 
relying on `segment.bytes`.
+    props.setProperty(LogConfig.INTERNAL_SEGMENT_BYTES_CONFIG, 
config.logSegmentBytes.toString)

Review Comment:
   > For another, we should move the test-only constructor out of the 
production code. This will prevent it from being used accidentally in a 
production environment. This could be considered as a follow-up ticket
   
   We should probably address this in this PR. Otherwise, the 
`MetadataLogConfig` constructor that takes `internalLogSegmentBytes` will seem 
a bit strange in the production code.
   
   see 
https://github.com/apache/kafka/blob/trunk/group-coordinator/src/test/java/org/apache/kafka/coordinator/group/GroupCoordinatorConfigTest.java#L285
 as example



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