[GitHub] leventov commented on a change in pull request #7088: Improve parallelism of zookeeper based segment change processing

[GitBox <gi...@apache.org>]

leventov commented on a change in pull request #7088: Improve parallelism of zookeeper based segment change processing
URL: https://github.com/apache/incubator-druid/pull/7088#discussion_r259540730
 
 

 ##########
 File path: server/src/main/java/org/apache/druid/server/coordinator/CuratorLoadQueuePeonV2.java
 ##########
 @@ -0,0 +1,418 @@
+/*
+ * 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.coordinator;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.ImmutableList;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.apache.curator.framework.CuratorFramework;
+import org.apache.curator.framework.api.CuratorWatcher;
+import org.apache.curator.utils.ZKPaths;
+import org.apache.druid.java.util.common.ISE;
+import org.apache.druid.java.util.emitter.EmittingLogger;
+import org.apache.druid.server.coordination.DataSegmentChangeRequest;
+import org.apache.druid.server.coordination.SegmentChangeRequestDrop;
+import org.apache.druid.server.coordination.SegmentChangeRequestLoad;
+import org.apache.druid.server.coordination.SegmentChangeRequestNoop;
+import org.apache.druid.timeline.DataSegment;
+import org.apache.druid.timeline.SegmentId;
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.data.Stat;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentSkipListMap;
+import java.util.concurrent.ConcurrentSkipListSet;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * Use {@link HttpLoadQueuePeon} instead.
+ */
+@Deprecated
+public class CuratorLoadQueuePeonV2 extends LoadQueuePeon
+{
+  private static final EmittingLogger log = new EmittingLogger(CuratorLoadQueuePeon.class);
+  private static final int DROP = 0;
+  private static final int LOAD = 1;
+  private final CuratorFramework curator;
+  private final String basePath;
+  private final ObjectMapper jsonMapper;
+  private final ExecutorService processingExecutor;
+  private final ScheduledExecutorService checkNodeRemovedExecutor;
+  private final ExecutorService callBackExecutor;
+  private final DruidCoordinatorConfig config;
+
+  private final AtomicLong queuedSize = new AtomicLong(0);
+  private final AtomicInteger failedAssignCount = new AtomicInteger(0);
+
+  private final ConcurrentSkipListMap<DataSegment, SegmentHolder> segmentsToLoad = new ConcurrentSkipListMap<>(
+      DruidCoordinator.SEGMENT_COMPARATOR
+  );
+  private final ConcurrentSkipListMap<DataSegment, SegmentHolder> segmentsToDrop = new ConcurrentSkipListMap<>(
+      DruidCoordinator.SEGMENT_COMPARATOR
+  );
+  private final ConcurrentSkipListSet<DataSegment> segmentsMarkedToDrop = new ConcurrentSkipListSet<>(
+      DruidCoordinator.SEGMENT_COMPARATOR
+  );
+
+  private static final int MAX_TASK_WAIT = 100;
 
 Review comment:
   Please specify units (I guess it should be `MAX_TASK_WAIT_MILLIS`).

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