himanshug commented on a change in pull request #8107: Add CliIndexer process type and initial task runner implementation URL: https://github.com/apache/incubator-druid/pull/8107#discussion_r307927997
########## File path: indexing-service/src/main/java/org/apache/druid/indexing/overlord/ThreadingTaskRunner.java ########## @@ -0,0 +1,566 @@ +/* + * 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.indexing.overlord; + +import com.fasterxml.jackson.databind.ObjectMapper; +import com.google.common.base.Joiner; +import com.google.common.base.Optional; +import com.google.common.collect.ImmutableSet; +import com.google.common.io.ByteSource; +import com.google.common.util.concurrent.Futures; +import com.google.common.util.concurrent.ListenableFuture; +import com.google.common.util.concurrent.ListeningExecutorService; +import com.google.common.util.concurrent.MoreExecutors; +import com.google.inject.Inject; +import org.apache.commons.io.FileUtils; +import org.apache.druid.guice.annotations.Self; +import org.apache.druid.indexer.RunnerTaskState; +import org.apache.druid.indexer.TaskLocation; +import org.apache.druid.indexer.TaskStatus; +import org.apache.druid.indexing.common.TaskReportFileWriter; +import org.apache.druid.indexing.common.TaskToolbox; +import org.apache.druid.indexing.common.TaskToolboxFactory; +import org.apache.druid.indexing.common.config.TaskConfig; +import org.apache.druid.indexing.common.task.Task; +import org.apache.druid.indexing.overlord.autoscaling.ScalingStats; +import org.apache.druid.indexing.worker.config.WorkerConfig; +import org.apache.druid.java.util.common.DateTimes; +import org.apache.druid.java.util.common.IOE; +import org.apache.druid.java.util.common.ISE; +import org.apache.druid.java.util.common.StringUtils; +import org.apache.druid.java.util.common.concurrent.Execs; +import org.apache.druid.java.util.common.io.Closer; +import org.apache.druid.java.util.emitter.EmittingLogger; +import org.apache.druid.query.Query; +import org.apache.druid.query.QueryRunner; +import org.apache.druid.query.QuerySegmentWalker; +import org.apache.druid.query.SegmentDescriptor; +import org.apache.druid.segment.realtime.appenderator.AppenderatorsManager; +import org.apache.druid.server.DruidNode; +import org.apache.druid.tasklogs.TaskLogPusher; +import org.apache.druid.tasklogs.TaskLogStreamer; +import org.joda.time.DateTime; +import org.joda.time.Interval; + +import javax.annotation.Nullable; +import java.io.File; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collection; +import java.util.List; +import java.util.Set; +import java.util.UUID; +import java.util.concurrent.Callable; +import java.util.concurrent.TimeUnit; + +/** + * TaskRunner implemention for the CliIndexer task execution service, which runs all tasks in a single process. + * + * Two thread pools are used: + * - A task execution pool, sized to number of worker slots. This is used to execute the Task run() methods. + * - A control thread pool, sized to worker slots * 2. The control threads setup and submit work to the + * task execution pool, and are also responsible for running graceful shutdown on the Task objects. + * Only one shutdown per-task can be running at a given time, and there is one control thread per task, + * thus the pool has 2 * worker slots. + * + * Note that separate task logs are not supported, all task log entries will be written to the Indexer process log + * instead. + */ +public class ThreadingTaskRunner + extends BaseRestorableTaskRunner<ThreadingTaskRunner.ThreadingTaskRunnerWorkItem> + implements TaskLogStreamer, QuerySegmentWalker +{ + private static final EmittingLogger LOGGER = new EmittingLogger(ThreadingTaskRunner.class); + + private final TaskToolboxFactory toolboxFactory; + private final TaskLogPusher taskLogPusher; + private final DruidNode node; + private final AppenderatorsManager appenderatorsManager; + private final TaskReportFileWriter taskReportFileWriter; + private final ListeningExecutorService taskExecutor; + private final ListeningExecutorService controlThreadExecutor; + + private volatile boolean stopping = false; + + @Inject + public ThreadingTaskRunner( + TaskToolboxFactory toolboxFactory, + TaskConfig taskConfig, + WorkerConfig workerConfig, + TaskLogPusher taskLogPusher, + ObjectMapper jsonMapper, + AppenderatorsManager appenderatorsManager, + TaskReportFileWriter taskReportFileWriter, + @Self DruidNode node + ) + { + super(jsonMapper, taskConfig); + this.toolboxFactory = toolboxFactory; + this.taskLogPusher = taskLogPusher; + this.node = node; + this.appenderatorsManager = appenderatorsManager; + this.taskReportFileWriter = taskReportFileWriter; + this.taskExecutor = MoreExecutors.listeningDecorator( + Execs.multiThreaded(workerConfig.getCapacity(), "threading-task-runner-executor-%d") + ); + this.controlThreadExecutor = MoreExecutors.listeningDecorator( + Execs.multiThreaded(workerConfig.getCapacity() * 2, "threading-task-runner-control-%d") + ); + } + + @Override + public Optional<ByteSource> streamTaskLog(String taskid, long offset) throws IOException + { + // task logs will appear in the main indexer log, streaming individual task logs is not supported + return Optional.absent(); + } + + @Override + public void start() + { + // Nothing to start. + } + + @Override + public ListenableFuture<TaskStatus> run(Task task) + { + synchronized (tasks) { + tasks.computeIfAbsent( + task.getId(), k -> + new ThreadingTaskRunnerWorkItem( + task, + controlThreadExecutor.submit( + new Callable<TaskStatus>() { + @Override + public TaskStatus call() + { + final String attemptUUID = UUID.randomUUID().toString(); + final File taskDir = taskConfig.getTaskDir(task.getId()); + final File attemptDir = new File(taskDir, attemptUUID); + + final TaskLocation taskLocation = TaskLocation.create( + node.getHost(), + node.getPlaintextPort(), + node.getTlsPort() + ); + + try { + final Closer closer = Closer.create(); + try { Review comment: do we really need two try blocks ... line 164 and 166 , could they be folded in to one ? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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