[GitHub] [kafka] hachikuji commented on a diff in pull request #12487: KAFKA-14140: Ensure an offline or in-controlled-shutdown replica is not eligible to join ISR in ZK mode

[GitBox <gi...@apache.org>]

hachikuji commented on code in PR #12487:
URL: https://github.com/apache/kafka/pull/12487#discussion_r941604866


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core/src/main/scala/kafka/cluster/Partition.scala:
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@@ -881,11 +881,16 @@ class Partition(val topicPartition: TopicPartition,
   private def isReplicaIsrEligible(followerReplicaId: Int): Boolean = {
     metadataCache match {
       // In KRaft mode, only replicas which are not fenced nor in controlled shutdown are
-      // allowed to join the ISR. This does not apply to ZK mode.
+      // allowed to join the ISR.
       case kRaftMetadataCache: KRaftMetadataCache =>
         !kRaftMetadataCache.isBrokerFenced(followerReplicaId) &&
           !kRaftMetadataCache.isBrokerShuttingDown(followerReplicaId)
 
+      // In ZK mode, we just ensure the broker is alive. Although we do not check for shutting down brokers here,'

Review Comment:
   nit: unintentional apostrophe at the end?



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