kfaraz commented on code in PR #17899: URL: https://github.com/apache/druid/pull/17899#discussion_r2051924745
########## server/src/main/java/org/apache/druid/server/http/CoordinatorDynamicConfigSyncer.java: ########## @@ -0,0 +1,159 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.druid.server.http; + +import com.fasterxml.jackson.databind.ObjectMapper; +import com.google.inject.Inject; +import org.apache.druid.discovery.DiscoveryDruidNode; +import org.apache.druid.discovery.DruidNodeDiscoveryProvider; +import org.apache.druid.discovery.NodeRole; +import org.apache.druid.guice.annotations.EscalatedGlobal; +import org.apache.druid.guice.annotations.Json; +import org.apache.druid.java.util.common.StringUtils; +import org.apache.druid.java.util.common.concurrent.Execs; +import org.apache.druid.java.util.common.logger.Logger; +import org.apache.druid.java.util.http.client.response.BytesFullResponseHandler; +import org.apache.druid.java.util.http.client.response.BytesFullResponseHolder; +import org.apache.druid.rpc.FixedServiceLocator; +import org.apache.druid.rpc.RequestBuilder; +import org.apache.druid.rpc.ServiceClient; +import org.apache.druid.rpc.ServiceClientFactory; +import org.apache.druid.rpc.ServiceLocation; +import org.apache.druid.rpc.StandardRetryPolicy; +import org.apache.druid.server.coordinator.CoordinatorConfigManager; +import org.apache.druid.server.coordinator.CoordinatorDynamicConfig; +import org.jboss.netty.handler.codec.http.HttpMethod; +import org.jboss.netty.handler.codec.http.HttpResponseStatus; + +import java.net.URL; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.atomic.AtomicReference; +import java.util.stream.Collectors; + +/** + * Updates all brokers with the latest coordinator dynamic config. + */ +public class CoordinatorDynamicConfigSyncer Review Comment: It feels redundant to have both a duty and a dedicated syncer class with its own `exec`. I would have preferred having the duty, but since we need to trigger the sync whenever the dynamic config is updated, I think let's just have the syncer. When coordinator becomes leader, schedule a periodic sync on the `exec`. The periodic sync task just goes through each broker one by one. When it is not leader anymore, stop the sync. Emit metrics for: - sync time of each broker - total sync time - number of failed syncs -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
