KAFKA-19183: Replace Pool with ConcurrentHashMap #19535
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Signed-off-by: PoAn Yang <[email protected]>
chia7712
reviewed
Apr 26, 2025
| @@ -43,7 +43,7 @@ abstract class AbstractFetcherManager[T <: AbstractFetcherThread](val name: Stri | |||
| metricsGroup.newGauge("MaxLag", () => { | |||
| // current max lag across all fetchers/topics/partitions | |||
| fetcherThreadMap.values.foldLeft(0L) { (curMaxLagAll, fetcherThread) => | |||
| val maxLagThread = fetcherThread.fetcherLagStats.stats.values.foldLeft(0L)((curMaxLagThread, lagMetrics) => | |||
| val maxLagThread = fetcherThread.fetcherLagStats.stats.values.asScala.foldLeft(0L)((curMaxLagThread, lagMetrics) => | |||
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val maxLagThread = fetcherThread.fetcherLagStats.stats.values.stream().mapToLong(v => v.lag).max().orElse(0L)| @@ -916,7 +915,7 @@ class FetcherLagStats(metricId: ClientIdAndBroker) { | |||
| } | |||
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| def unregister(): Unit = { | |||
| stats.keys.toBuffer.foreach { key: TopicPartition => | |||
| stats.keys.asScala.toBuffer.foreach { key: TopicPartition => | |||
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stats.forEach((key, _) => unregister(key))| followers.foreach(id => remoteReplicasMap.getAndMaybePut(id, new Replica(id, topicPartition, metadataCache))) | ||
| remoteReplicasMap.removeAll(removedReplicas) | ||
| followers.foreach(id => remoteReplicasMap.computeIfAbsent(id, k => new Replica(id, topicPartition, metadataCache))) | ||
| remoteReplicasMap.keySet.removeAll(removedReplicas.asJavaCollection) |
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remoteReplicasMap.keySet.removeIf(replica => !followers.contains(replica))|
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| // Due to code paths accessing remoteReplicasMap without a lock, | ||
| // first add the new replicas and then remove the old ones. | ||
| followers.foreach(id => remoteReplicasMap.getAndMaybePut(id, new Replica(id, topicPartition, metadataCache))) | ||
| remoteReplicasMap.removeAll(removedReplicas) | ||
| followers.foreach(id => remoteReplicasMap.computeIfAbsent(id, k => new Replica(id, topicPartition, metadataCache))) |
| @@ -2512,7 +2510,7 @@ class ReplicaManager(val config: KafkaConfig, | |||
| trace("Evaluating ISR list of partitions to see which replicas can be removed from the ISR") | |||
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| // Shrink ISRs for non offline partitions | |||
| allPartitions.keys.foreach { topicPartition => | |||
| allPartitions.keys.asScala.foreach { topicPartition => | |||
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allPartitions.forEach { (topicPartition, _) =>
onlinePartition(topicPartition).foreach(_.maybeShrinkIsr())
}
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Pool.scalawithConcurrentHashMap.PoolTest.scala.