CalvinConfluent commented on code in PR #14053:
URL: https://github.com/apache/kafka/pull/14053#discussion_r1350811307


##########
core/src/main/scala/kafka/cluster/Replica.scala:
##########
@@ -98,14 +105,22 @@ class Replica(val brokerId: Int, val topicPartition: 
TopicPartition) extends Log
    * fetch request is always smaller than the leader's LEO, which can happen 
if small produce requests are received at
    * high frequency.
    */
-  def updateFetchState(
+  def updateFetchStateOrThrow(
     followerFetchOffsetMetadata: LogOffsetMetadata,
     followerStartOffset: Long,
     followerFetchTimeMs: Long,
     leaderEndOffset: Long,
     brokerEpoch: Long
   ): Unit = {
     replicaState.updateAndGet { currentReplicaState =>
+      val cachedBrokerEpoch = if 
(metadataCache.isInstanceOf[KRaftMetadataCache])

Review Comment:
   Thanks!



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