yarn 3.2源码分析之NM端launchContainer事件流程

最新推荐文章于 2022-11-10 10:34:21 发布

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最新推荐文章于 2022-11-10 10:34:21 发布 · 2.3k 阅读

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概述

NM端launch container会经历的event： LaunchContainer类型的ContainersLaunchEvent

yarn application会因为container分配失败而导致application failed，以下日志可以大概得知launch container的流程

Application application_1555482591931_0853 failed 2 times due to AM Container for appattempt_1555482591931_0853_000002 exited with exitCode: 10
For more detailed output, check application tracking page:http://hadoop5:8088/proxy/application_1555482591931_0853/Then, click on links to logs of each attempt.
Diagnostics: Exception from container-launch.
Container id: container_e156_1555482591931_0853_02_000001
Exit code: 10
Stack trace: ExitCodeException exitCode=10:
at org.apache.hadoop.util.Shell.runCommand(Shell.java:538)
at org.apache.hadoop.util.Shell.run(Shell.java:455)
at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:715)
at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:212)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:302)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:82)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Container exited with a non-zero exit code 10
Failing this attempt. Failing the application.

ContainerImpl将ContainersLauncherEvent提交给AsyncDisptaher

public void sendLaunchEvent() {
    if (ContainerState.PAUSED == getContainerState()) {
      dispatcher.getEventHandler().handle(
          new ContainerResumeEvent(containerId,
              "Container Resumed as some resources freed up"));
    } else {
      ContainersLauncherEventType launcherEvent =
          ContainersLauncherEventType.LAUNCH_CONTAINER;
      if (recoveredStatus == RecoveredContainerStatus.LAUNCHED) {
        // try to recover a container that was previously launched
        launcherEvent = ContainersLauncherEventType.RECOVER_CONTAINER;
      } else if (recoveredStatus == RecoveredContainerStatus.PAUSED) {
        launcherEvent = ContainersLauncherEventType.RECOVER_PAUSED_CONTAINER;
      }

      containerLaunchStartTime = clock.getTime();
      dispatcher.getEventHandler().handle(
          new ContainersLauncherEvent(this, launcherEvent));
    }

  }

ContainerManagerImpl注册处理ContainersLauncherEvent的处理器

 public ContainerManagerImpl(Context context, ContainerExecutor exec,
      DeletionService deletionContext, NodeStatusUpdater nodeStatusUpdater,
      NodeManagerMetrics metrics, LocalDirsHandlerService dirsHandler) {
    super(ContainerManagerImpl.class.getName());
    this.context = context;
    this.dirsHandler = dirsHandler;

    // ContainerManager level dispatcher.
    dispatcher = new AsyncDispatcher("NM ContainerManager dispatcher");
    this.deletionService = deletionContext;
    this.metrics = metrics;

    rsrcLocalizationSrvc =
        createResourceLocalizationService(exec, deletionContext, context,
            metrics);
    addService(rsrcLocalizationSrvc);

    containersLauncher = createContainersLauncher(context, exec);
    addService(containersLauncher);

    this.nodeStatusUpdater = nodeStatusUpdater;
    this.containerScheduler = createContainerScheduler(context);
    addService(containerScheduler);

    AuxiliaryLocalPathHandler auxiliaryLocalPathHandler =
        new AuxiliaryLocalPathHandlerImpl(dirsHandler);
    // Start configurable services
    auxiliaryServices = new AuxServices(auxiliaryLocalPathHandler,
        this.context, this.deletionService);
    auxiliaryServices.registerServiceListener(this);
    addService(auxiliaryServices);

    // initialize the metrics publisher if the timeline service v.2 is enabled
    // and the system publisher is enabled
    Configuration conf = context.getConf();
    if (YarnConfiguration.timelineServiceV2Enabled(conf) &&
        YarnConfiguration.systemMetricsPublisherEnabled(conf)) {
      LOG.info("YARN system metrics publishing service is enabled");
      nmMetricsPublisher = createNMTimelinePublisher(context);
      context.setNMTimelinePublisher(nmMetricsPublisher);
    }
    this.containersMonitor = createContainersMonitor(exec);
    addService(this.containersMonitor);

    dispatcher.register(ContainerEventType.class,
        new ContainerEventDispatcher());
    dispatcher.register(ApplicationEventType.class,
        createApplicationEventDispatcher());
    dispatcher.register(LocalizationEventType.class,
        new LocalizationEventHandlerWrapper(rsrcLocalizationSrvc,
            nmMetricsPublisher));
    dispatcher.register(AuxServicesEventType.class, auxiliaryServices);
    dispatcher.register(ContainersMonitorEventType.class, containersMonitor);
//注册处理ContainersLaunchEvent的处理器
    dispatcher.register(ContainersLauncherEventType.class, containersLauncher);
    dispatcher.register(ContainerSchedulerEventType.class, containerScheduler);

    addService(dispatcher);

    ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
    this.readLock = lock.readLock();
    this.writeLock = lock.writeLock();
  }

protected ContainersLauncher createContainersLauncher(Context context,
      ContainerExecutor exec) {
    return new ContainersLauncher(context, this.dispatcher, exec, dirsHandler, this);
  }