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KAFKA-14918 Only send controller RPCs to migrating ZK brokers #13606

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Apr 19, 2023
Merged

KAFKA-14918 Only send controller RPCs to migrating ZK brokers #13606

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f08c91e
Only send ZK RPCs to unfenced ZK brokers
mumrah Apr 18, 2023
4b9aa7c
Add unit test for calculateBrokerChanges
mumrah Apr 18, 2023
645140f
add license
mumrah Apr 18, 2023
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26 changes: 18 additions & 8 deletions core/src/main/scala/kafka/migration/MigrationPropagator.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -70,14 +70,24 @@ class MigrationPropagator(

override def publishMetadata(image: MetadataImage): Unit = {
val oldImage = _image
val addedBrokers = new util.HashSet[Integer](image.cluster().brokers().keySet())
addedBrokers.removeAll(oldImage.cluster().brokers().keySet())
val removedBrokers = new util.HashSet[Integer](oldImage.cluster().brokers().keySet())
removedBrokers.removeAll(image.cluster().brokers().keySet())

removedBrokers.asScala.foreach(id => channelManager.removeBroker(id))
addedBrokers.asScala.foreach(id =>
channelManager.addBroker(Broker.fromBrokerRegistration(image.cluster().broker(id))))
val prevBrokers = oldImage.cluster().brokers().values().asScala
.filter(_.isMigratingZkBroker)
.filterNot(_.fenced)
.map(Broker.fromBrokerRegistration)
.toSet

val aliveBrokers = image.cluster().brokers().values().asScala
.filter(_.isMigratingZkBroker)
.filterNot(_.fenced)
.map(Broker.fromBrokerRegistration)
.toSet

val addedBrokers = aliveBrokers -- prevBrokers
val removedBrokers = prevBrokers -- aliveBrokers

stateChangeLogger.logger.debug(s"Adding brokers $addedBrokers, removing brokers $removedBrokers.")
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removedBrokers.foreach(broker => channelManager.removeBroker(broker.id))
addedBrokers.foreach(broker => channelManager.addBroker(broker))
_image = image
}

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