showuon commented on code in PR #15951:
URL: https://github.com/apache/kafka/pull/15951#discussion_r1609228927
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core/src/main/scala/kafka/server/ReplicaManager.scala:
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@@ -2114,16 +2114,12 @@ 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)
+ // Add future replica log to partition's map if it's not existed
Review Comment:
> However, adding alter thread
(replicaAlterLogDirsManager.addFetcherForPartitions(futureReplicasAndInitialOffset))
is not in this check. Is it possible that alter thread, which is invoked by
another thread, just remove the future log and then this thread add the topic
partition to replicaAlterLogDirsManager? It seems to me that alter thread will
get fail as future log of partition is gone.
That's possible. But I think that's fine because the removal of future log
could because:
1. alter logDir completes. In this case, the new leaderAndIsr request or
topic partition update will updated and this fetcher will be removed then in
`ReplicaManager#makeLeader or makeFollower`.
2. Another log failure happened. In this case the createLogIfInexsted will
fail, too.
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