showuon commented on code in PR #15951:
URL: https://github.com/apache/kafka/pull/15951#discussion_r1608048789
##########
core/src/main/scala/kafka/server/ReplicaManager.scala:
##########
@@ -2114,19 +2114,16 @@ class ReplicaManager(val config: KafkaConfig,
partition.log.foreach { _ =>
val leader = BrokerEndPoint(config.brokerId, "localhost", -1)
- // Add future replica log to partition's map
- partition.createLogIfNotExists(
- isNew = false,
- isFutureReplica = true,
- offsetCheckpoints,
- topicIds(partition.topic))
-
- // pause cleaning for partitions that are being moved and start
ReplicaAlterDirThread to move
- // replica from source dir to destination dir
- logManager.abortAndPauseCleaning(topicPartition)
-
- futureReplicasAndInitialOffset.put(topicPartition,
InitialFetchState(topicIds(topicPartition.topic), leader,
- partition.getLeaderEpoch, futureLog.highWatermark))
+ if (partition.maybeCreateFutureReplica(futureLog.parentDir,
offsetCheckpoints, topicIds(partition.topic))) {
Review Comment:
We need a way to determine if `partition#futureLog` map exists or not, so if
we call `partition.createLogIfNotExists()`, we can't know if it is created or
not. `partition.maybeCreateFutureReplica()` returns a boolean value to notify
us what we need.
That is, `partition.maybeCreateFutureReplica()` only calls
`partition.createLogIfNotExists()` when the `partition#futureLog` map doesn't
contain the partition. That's fine because there is no chances that futureLog
exists in `partition#futureLog` but not in `logManager#futureLogs` map.
Sorry, maybe I didn't get your question here. Could you explain again if I
misunderstand it?
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