mumrah commented on a change in pull request #9100:
URL: https://github.com/apache/kafka/pull/9100#discussion_r470678123
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File path: core/src/main/scala/kafka/cluster/Partition.scala
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@@ -255,6 +255,10 @@ class Partition(val topicPartition: TopicPartition,
def isAddingReplica(replicaId: Int): Boolean =
assignmentState.isAddingReplica(replicaId)
+ // For advancing the HW we assume the largest ISR even if the controller
hasn't made the change yet
+ // This set includes the latest ISR (as we learned from LeaderAndIsr) and
any replicas from a pending ISR expansion
+ def effectiveInSyncReplicaIds: Set[Int] = inSyncReplicaIds |
pendingInSyncReplicaIds
Review comment:
Since we are now only allowing one in-flight AlterIsr, I changed the
semantics of pendingInSyncReplicaIds to be the maximal "effective" ISR. This
way we don't need to compute it each time.
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