CalvinConfluent commented on code in PR #14594: URL: https://github.com/apache/kafka/pull/14594#discussion_r1373421615
########## core/src/main/scala/kafka/cluster/Partition.scala: ########## @@ -359,10 +361,14 @@ class Partition(val topicPartition: TopicPartition, // a false positive under min isr check, it has to check the leaderReplicaIdOpt again. Though it can still be affected // by ABA problems when leader->follower->leader, but it should be good enough for a metric. def isUnderMinIsr: Boolean = { - leaderLogIfLocal.exists { partitionState.isr.size < _.config.minInSyncReplicas } && isLeader + leaderLogIfLocal.exists{partitionState.isr.size < effectiveMinIsr(_) } && isLeader } - def isAtMinIsr: Boolean = leaderLogIfLocal.exists { partitionState.isr.size == _.config.minInSyncReplicas } + private def effectiveMinIsr(leaderLog: UnifiedLog): Int = { + leaderLog.config.minInSyncReplicas.min(remoteReplicasMap.size + 1) Review Comment: The removed UT tries to set the min ISR larger than the replication factor. Basically, we don't have any restraints over the minISR value. If someone set or has set the minISR wrongly, it will be wield availability issue after the upgrade. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org