junrao commented on code in PR #14767: URL: https://github.com/apache/kafka/pull/14767#discussion_r1411280008
########## core/src/main/scala/kafka/server/BrokerServer.scala: ########## @@ -235,14 +235,15 @@ class BrokerServer( ) clientToControllerChannelManager.start() forwardingManager = new ForwardingManagerImpl(clientToControllerChannelManager) - + clientMetricsManager = new ClientMetricsManager(clientMetricsReceiverPlugin, config.clientTelemetryMaxBytes, time) val apiVersionManager = ApiVersionManager( ListenerType.BROKER, config, Some(forwardingManager), brokerFeatures, - metadataCache + metadataCache, + Some(clientMetricsManager) Review Comment: We need to be a bit careful about synchronization. `ClientMetricsReceiverPlugin.receivers` is set in the main thread later through `config.dynamicConfig.addReconfigurables(this)`, but is read in either the network or the request handler thread. We need to add memory barrier to ensure visibility across threads. ########## core/src/main/scala/kafka/server/ApiVersionManager.scala: ########## @@ -130,7 +133,8 @@ class DefaultApiVersionManager( brokerFeatures: BrokerFeatures, metadataCache: MetadataCache, val enableUnstableLastVersion: Boolean, - val zkMigrationEnabled: Boolean = false + val zkMigrationEnabled: Boolean = false, + val clientMetricsManager: Option[ClientMetricsManager] = None Review Comment: Could we add the new param to javadoc? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org