org.apache.hadoop.yarn.server.nodemanager.Context Java Examples

public ContainerLaunch(Context context, Configuration configuration,
    Dispatcher dispatcher, ContainerExecutor exec, Application app,
    Container container, LocalDirsHandlerService dirsHandler,
    ContainerManagerImpl containerManager) {
  this.context = context;
  this.conf = configuration;
  this.app = app;
  this.exec = exec;
  this.container = container;
  this.dispatcher = dispatcher;
  this.dirsHandler = dirsHandler;
  this.containerManager = containerManager;
  this.sleepDelayBeforeSigKill =
      conf.getLong(YarnConfiguration.NM_SLEEP_DELAY_BEFORE_SIGKILL_MS,
          YarnConfiguration.DEFAULT_NM_SLEEP_DELAY_BEFORE_SIGKILL_MS);
  this.maxKillWaitTime =
      conf.getLong(YarnConfiguration.NM_PROCESS_KILL_WAIT_MS,
          YarnConfiguration.DEFAULT_NM_PROCESS_KILL_WAIT_MS);
}
 

/**
 * Finds the local directories that logs for the given container are stored
 * on.
 */
public static List<File> getContainerLogDirs(ContainerId containerId,
    String remoteUser, Context context) throws YarnException {
  Container container = context.getContainers().get(containerId);

  Application application = getApplicationForContainer(containerId, context);
  checkAccess(remoteUser, application, context);
  // It is not required to have null check for container ( container == null )
  // and throw back exception.Because when container is completed, NodeManager
  // remove container information from its NMContext.Configuring log
  // aggregation to false, container log view request is forwarded to NM. NM
  // does not have completed container information,but still NM serve request for
  // reading container logs. 
  if (container != null) {
    checkState(container.getContainerState());
  }
  
  return getContainerLogDirs(containerId, context.getLocalDirsHandler());
}
 

private StartContainersResponse startContainer(Context context,
    final ContainerManagerImpl cm, ContainerId cid,
    ContainerLaunchContext clc, LogAggregationContext logAggregationContext)
        throws Exception {
  UserGroupInformation user = UserGroupInformation.createRemoteUser(
      cid.getApplicationAttemptId().toString());
  StartContainerRequest scReq = StartContainerRequest.newInstance(
      clc, TestContainerManager.createContainerToken(cid, 0,
          context.getNodeId(), user.getShortUserName(),
          context.getContainerTokenSecretManager(), logAggregationContext));
  final List<StartContainerRequest> scReqList =
      new ArrayList<StartContainerRequest>();
  scReqList.add(scReq);
  NMTokenIdentifier nmToken = new NMTokenIdentifier(
      cid.getApplicationAttemptId(), context.getNodeId(),
      user.getShortUserName(),
      context.getNMTokenSecretManager().getCurrentKey().getKeyId());
  user.addTokenIdentifier(nmToken);
  return user.doAs(new PrivilegedExceptionAction<StartContainersResponse>() {
    @Override
    public StartContainersResponse run() throws Exception {
      return cm.startContainers(
          StartContainersRequest.newInstance(scReqList));
    }
  });
}
 

private static void checkAccess(String remoteUser, Application application,
    Context context) throws YarnException {
  UserGroupInformation callerUGI = null;
  if (remoteUser != null) {
    callerUGI = UserGroupInformation.createRemoteUser(remoteUser);
  }
  if (callerUGI != null
      && !context.getApplicationACLsManager().checkAccess(callerUGI,
          ApplicationAccessType.VIEW_APP, application.getUser(),
          application.getAppId())) {
    throw new YarnException(
        "User [" + remoteUser
            + "] is not authorized to view the logs for application "
            + application.getAppId());
  }
}
 

/**
 * Finds the log file with the given filename for the given container.
 */
public static File getContainerLogFile(ContainerId containerId,
    String fileName, String remoteUser, Context context) throws YarnException {
  Container container = context.getContainers().get(containerId);
  
  Application application = getApplicationForContainer(containerId, context);
  checkAccess(remoteUser, application, context);
  if (container != null) {
    checkState(container.getContainerState());
  }
  
  try {
    LocalDirsHandlerService dirsHandler = context.getLocalDirsHandler();
    String relativeContainerLogDir = ContainerLaunch.getRelativeContainerLogDir(
        application.getAppId().toString(), containerId.toString());
    Path logPath = dirsHandler.getLogPathToRead(
        relativeContainerLogDir + Path.SEPARATOR + fileName);
    URI logPathURI = new File(logPath.toString()).toURI();
    File logFile = new File(logPathURI.getPath());
    return logFile;
  } catch (IOException e) {
    LOG.warn("Failed to find log file", e);
    throw new NotFoundException("Cannot find this log on the local disk.");
  }
}
 

public static FileInputStream openLogFileForRead(String containerIdStr, File logFile,
    Context context) throws IOException {
  ContainerId containerId = ConverterUtils.toContainerId(containerIdStr);
  ApplicationId applicationId = containerId.getApplicationAttemptId()
      .getApplicationId();
  String user = context.getApplications().get(
      applicationId).getUser();
  
  try {
    return SecureIOUtils.openForRead(logFile, user, null);
  } catch (IOException e) {
    if (e.getMessage().contains(
      "did not match expected owner '" + user
          + "'")) {
      LOG.error(
          "Exception reading log file " + logFile.getAbsolutePath(), e);
      throw new IOException("Exception reading log file. Application submitted by '"
          + user
          + "' doesn't own requested log file : "
          + logFile.getName(), e);
    } else {
      throw new IOException("Exception reading log file. It might be because log "
          + "file was aggregated : " + logFile.getName(), e);
    }
  }
}
 

@Override
protected void serviceStart() throws Exception {
  String bindAddress = WebAppUtils.getWebAppBindURL(getConfig(),
                        YarnConfiguration.NM_BIND_HOST,
                        WebAppUtils.getNMWebAppURLWithoutScheme(getConfig()));
  
  LOG.info("Instantiating NMWebApp at " + bindAddress);
  try {
    this.webApp =
        WebApps
          .$for("node", Context.class, this.nmContext, "ws")
          .at(bindAddress)
          .with(getConfig())
          .withHttpSpnegoPrincipalKey(
            YarnConfiguration.NM_WEBAPP_SPNEGO_USER_NAME_KEY)
          .withHttpSpnegoKeytabKey(
            YarnConfiguration.NM_WEBAPP_SPNEGO_KEYTAB_FILE_KEY)
          .start(this.nmWebApp);
    this.port = this.webApp.httpServer().getConnectorAddress(0).getPort();
  } catch (Exception e) {
    String msg = "NMWebapps failed to start.";
    LOG.error(msg, e);
    throw new YarnRuntimeException(msg, e);
  }
  super.serviceStart();
}
 

public ResourceLocalizationService(Dispatcher dispatcher,
    ContainerExecutor exec, DeletionService delService,
    LocalDirsHandlerService dirsHandler, Context context) {

  super(ResourceLocalizationService.class.getName());
  this.exec = exec;
  this.dispatcher = dispatcher;
  this.delService = delService;
  this.dirsHandler = dirsHandler;

  this.cacheCleanup = new ScheduledThreadPoolExecutor(1,
      new ThreadFactoryBuilder()
        .setNameFormat("ResourceLocalizationService Cache Cleanup")
        .build());
  this.stateStore = context.getNMStateStore();
  this.nmContext = context;
}
 

public ContainerLaunch(Context context, Configuration configuration,
    Dispatcher dispatcher, ContainerExecutor exec, Application app,
    Container container, LocalDirsHandlerService dirsHandler,
    ContainerManagerImpl containerManager) {
  this.context = context;
  this.conf = configuration;
  this.app = app;
  this.exec = exec;
  this.container = container;
  this.dispatcher = dispatcher;
  this.dirsHandler = dirsHandler;
  this.containerManager = containerManager;
  this.sleepDelayBeforeSigKill =
      conf.getLong(YarnConfiguration.NM_SLEEP_DELAY_BEFORE_SIGKILL_MS,
          YarnConfiguration.DEFAULT_NM_SLEEP_DELAY_BEFORE_SIGKILL_MS);
  this.maxKillWaitTime =
      conf.getLong(YarnConfiguration.NM_PROCESS_KILL_WAIT_MS,
          YarnConfiguration.DEFAULT_NM_PROCESS_KILL_WAIT_MS);

  this.olr = new OwnLocalResources();
}
 

@Override
protected NodeStatusUpdater createNodeStatusUpdater(Context context,
                                                    Dispatcher dispatcher, NodeHealthCheckerService healthChecker) {
    return new NodeStatusUpdaterImpl(context, dispatcher,
                                     healthChecker, metrics) {
        @Override
        protected ResourceTracker getRMClient() {
            final ResourceTrackerService rt =
                getResourceManager().getResourceTrackerService();
            final RecordFactory recordFactory =
                RecordFactoryProvider.getRecordFactory(null);

            // For in-process communication without RPC
            return Utils.getResourceTracker(rt);
        }

        @Override
        protected void stopRMProxy() { }
     };
}
 

public NodeInfo(final Context context, final ResourceView resourceView) {

    this.id = context.getNodeId().toString();
    this.nodeHostName = context.getNodeId().getHost();
    this.totalVmemAllocatedContainersMB = resourceView
        .getVmemAllocatedForContainers() / BYTES_IN_MB;
    this.vmemCheckEnabled = resourceView.isVmemCheckEnabled();
    this.totalPmemAllocatedContainersMB = resourceView
        .getPmemAllocatedForContainers() / BYTES_IN_MB;
    this.pmemCheckEnabled = resourceView.isPmemCheckEnabled();
    this.totalVCoresAllocatedContainers = resourceView
        .getVCoresAllocatedForContainers();
    this.nodeHealthy = context.getNodeHealthStatus().getIsNodeHealthy();
    this.lastNodeUpdateTime = context.getNodeHealthStatus()
        .getLastHealthReportTime();

    this.healthReport = context.getNodeHealthStatus().getHealthReport();

    this.nodeManagerVersion = YarnVersionInfo.getVersion();
    this.nodeManagerBuildVersion = YarnVersionInfo.getBuildVersion();
    this.nodeManagerVersionBuiltOn = YarnVersionInfo.getDate();
    this.hadoopVersion = VersionInfo.getVersion();
    this.hadoopBuildVersion = VersionInfo.getBuildVersion();
    this.hadoopVersionBuiltOn = VersionInfo.getDate();
  }
 

private void waitForContainerToFinishOnNM(ContainerId containerId) {
  Context nmContet = yarnCluster.getNodeManager(0).getNMContext();
  int interval = 4 * 60; // Max time for container token to expire.
  Assert.assertNotNull(nmContet.getContainers().containsKey(containerId));
  while ((interval-- > 0)
      && !nmContet.getContainers().get(containerId)
        .cloneAndGetContainerStatus().getState()
        .equals(ContainerState.COMPLETE)) {
    try {
      LOG.info("Waiting for " + containerId + " to complete.");
      Thread.sleep(1000);
    } catch (InterruptedException e) {
    }
  }
  // Normally, Containers will be removed from NM context after they are
  // explicitly acked by RM. Now, manually remove it for testing.
  yarnCluster.getNodeManager(0).getNodeStatusUpdater()
    .addCompletedContainer(containerId);
  nmContet.getContainers().remove(containerId);
}
 

public ResourceLocalizationService(Dispatcher dispatcher,
    ContainerExecutor exec, DeletionService delService,
    LocalDirsHandlerService dirsHandler, Context context) {

  super(ResourceLocalizationService.class.getName());
  this.exec = exec;
  this.dispatcher = dispatcher;
  this.delService = delService;
  this.dirsHandler = dirsHandler;

  this.cacheCleanup = new ScheduledThreadPoolExecutor(1,
      new ThreadFactoryBuilder()
        .setNameFormat("ResourceLocalizationService Cache Cleanup")
        .build());
  this.stateStore = context.getNMStateStore();
  this.nmContext = context;
}
 

@Override
protected void serviceStart() throws Exception {
  String bindAddress = WebAppUtils.getWebAppBindURL(getConfig(),
                        YarnConfiguration.NM_BIND_HOST,
                        WebAppUtils.getNMWebAppURLWithoutScheme(getConfig()));
  
  LOG.info("Instantiating NMWebApp at " + bindAddress);
  try {
    this.webApp =
        WebApps
          .$for("node", Context.class, this.nmContext, "ws")
          .at(bindAddress)
          .with(getConfig())
          .withHttpSpnegoPrincipalKey(
            YarnConfiguration.NM_WEBAPP_SPNEGO_USER_NAME_KEY)
          .withHttpSpnegoKeytabKey(
            YarnConfiguration.NM_WEBAPP_SPNEGO_KEYTAB_FILE_KEY)
          .start(this.nmWebApp);
    this.port = this.webApp.httpServer().getConnectorAddress(0).getPort();
  } catch (Exception e) {
    String msg = "NMWebapps failed to start.";
    LOG.error(msg, e);
    throw new YarnRuntimeException(msg, e);
  }
  super.serviceStart();
}
 

public static FileInputStream openLogFileForRead(String containerIdStr, File logFile,
    Context context) throws IOException {
  ContainerId containerId = ConverterUtils.toContainerId(containerIdStr);
  ApplicationId applicationId = containerId.getApplicationAttemptId()
      .getApplicationId();
  String user = context.getApplications().get(
      applicationId).getUser();
  
  try {
    return SecureIOUtils.openForRead(logFile, user, null);
  } catch (IOException e) {
    if (e.getMessage().contains(
      "did not match expected owner '" + user
          + "'")) {
      LOG.error(
          "Exception reading log file " + logFile.getAbsolutePath(), e);
      throw new IOException("Exception reading log file. Application submitted by '"
          + user
          + "' doesn't own requested log file : "
          + logFile.getName(), e);
    } else {
      throw new IOException("Exception reading log file. It might be because log "
          + "file was aggregated : " + logFile.getName(), e);
    }
  }
}
 

private static void checkAccess(String remoteUser, Application application,
    Context context) throws YarnException {
  UserGroupInformation callerUGI = null;
  if (remoteUser != null) {
    callerUGI = UserGroupInformation.createRemoteUser(remoteUser);
  }
  if (callerUGI != null
      && !context.getApplicationACLsManager().checkAccess(callerUGI,
          ApplicationAccessType.VIEW_APP, application.getUser(),
          application.getAppId())) {
    throw new YarnException(
        "User [" + remoteUser
            + "] is not authorized to view the logs for application "
            + application.getAppId());
  }
}
 

/**
 * Finds the log file with the given filename for the given container.
 */
public static File getContainerLogFile(ContainerId containerId,
    String fileName, String remoteUser, Context context) throws YarnException {
  Container container = context.getContainers().get(containerId);
  
  Application application = getApplicationForContainer(containerId, context);
  checkAccess(remoteUser, application, context);
  if (container != null) {
    checkState(container.getContainerState());
  }
  
  try {
    LocalDirsHandlerService dirsHandler = context.getLocalDirsHandler();
    String relativeContainerLogDir = ContainerLaunch.getRelativeContainerLogDir(
        application.getAppId().toString(), containerId.toString());
    Path logPath = dirsHandler.getLogPathToRead(
        relativeContainerLogDir + Path.SEPARATOR + fileName);
    URI logPathURI = new File(logPath.toString()).toURI();
    File logFile = new File(logPathURI.getPath());
    return logFile;
  } catch (IOException e) {
    LOG.warn("Failed to find log file", e);
    throw new NotFoundException("Cannot find this log on the local disk.");
  }
}
 

/**
 * Finds the local directories that logs for the given container are stored
 * on.
 */
public static List<File> getContainerLogDirs(ContainerId containerId,
    String remoteUser, Context context) throws YarnException {
  Container container = context.getContainers().get(containerId);

  Application application = getApplicationForContainer(containerId, context);
  checkAccess(remoteUser, application, context);
  // It is not required to have null check for container ( container == null )
  // and throw back exception.Because when container is completed, NodeManager
  // remove container information from its NMContext.Configuring log
  // aggregation to false, container log view request is forwarded to NM. NM
  // does not have completed container information,but still NM serve request for
  // reading container logs. 
  if (container != null) {
    checkState(container.getContainerState());
  }
  
  return getContainerLogDirs(containerId, context.getLocalDirsHandler());
}
 

private void waitForContainerToFinishOnNM(ContainerId containerId) {
  Context nmContet = yarnCluster.getNodeManager(0).getNMContext();
  int interval = 4 * 60; // Max time for container token to expire.
  Assert.assertNotNull(nmContet.getContainers().containsKey(containerId));
  while ((interval-- > 0)
      && !nmContet.getContainers().get(containerId)
        .cloneAndGetContainerStatus().getState()
        .equals(ContainerState.COMPLETE)) {
    try {
      LOG.info("Waiting for " + containerId + " to complete.");
      Thread.sleep(1000);
    } catch (InterruptedException e) {
    }
  }
  // Normally, Containers will be removed from NM context after they are
  // explicitly acked by RM. Now, manually remove it for testing.
  yarnCluster.getNodeManager(0).getNodeStatusUpdater()
    .addCompletedContainer(containerId);
  nmContet.getContainers().remove(containerId);
}
 

@Inject
public NMController(Configuration nmConf, RequestContext requestContext,
    Context nmContext) {
  super(requestContext);
  this.nmContext = nmContext;
  this.nmConf = nmConf;
}
 

protected LogHandler createLogHandler(Configuration conf, Context context,
    DeletionService deletionService) {
  if (conf.getBoolean(YarnConfiguration.LOG_AGGREGATION_ENABLED,
      YarnConfiguration.DEFAULT_LOG_AGGREGATION_ENABLED)) {
    return new LogAggregationService(this.dispatcher, context,
        deletionService, dirsHandler);
  } else {
    return new NonAggregatingLogHandler(this.dispatcher, deletionService,
                                        dirsHandler,
                                        context.getNMStateStore());
  }
}
 

private void writeContainerLogs(Context nmContext,
    ContainerId containerId, LocalDirsHandlerService dirsHandler)
      throws IOException, YarnException {
  // ContainerLogDir should be created
  File containerLogDir =
      ContainerLogsUtils.getContainerLogDirs(containerId,
          dirsHandler).get(0);
  containerLogDir.mkdirs();
  for (String fileType : new String[] { "stdout", "stderr", "syslog" }) {
    Writer writer = new FileWriter(new File(containerLogDir, fileType));
    writer.write(ConverterUtils.toString(containerId) + "\n Hello "
        + fileType + "!");
    writer.close();
  }
}
 

public ContainersMonitorImpl(ContainerExecutor exec,
    AsyncDispatcher dispatcher, Context context) {
  super("containers-monitor");

  this.containerExecutor = exec;
  this.eventDispatcher = dispatcher;
  this.context = context;

  this.containersToBeAdded = new HashMap<ContainerId, ProcessTreeInfo>();
  this.containersToBeRemoved = new ArrayList<ContainerId>();
  this.monitoringThread = new MonitoringThread();
}
 

@Test(timeout = 20000)
public void testContainerMonitorMemFlags() {
  ContainersMonitor cm = null;

  long expPmem = 8192 * 1024 * 1024l;
  long expVmem = (long) (expPmem * 2.1f);

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(false, false, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(false, cm.isPmemCheckEnabled());
  assertEquals(false, cm.isVmemCheckEnabled());

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(true, false, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(true, cm.isPmemCheckEnabled());
  assertEquals(false, cm.isVmemCheckEnabled());

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(true, true, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(true, cm.isPmemCheckEnabled());
  assertEquals(true, cm.isVmemCheckEnabled());

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(false, true, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(false, cm.isPmemCheckEnabled());
  assertEquals(true, cm.isVmemCheckEnabled());
}
 

@Test(timeout = 20000)
public void testContainerMonitorMemFlags() {
  ContainersMonitor cm = null;

  long expPmem = 8192 * 1024 * 1024l;
  long expVmem = (long) (expPmem * 2.1f);

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(false, false, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(false, cm.isPmemCheckEnabled());
  assertEquals(false, cm.isVmemCheckEnabled());

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(true, false, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(true, cm.isPmemCheckEnabled());
  assertEquals(false, cm.isVmemCheckEnabled());

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(true, true, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(true, cm.isPmemCheckEnabled());
  assertEquals(true, cm.isVmemCheckEnabled());

  cm = new ContainersMonitorImpl(mock(ContainerExecutor.class),
      mock(AsyncDispatcher.class), mock(Context.class));
  cm.init(getConfForCM(false, true, 8192, 2.1f));
  assertEquals(expPmem, cm.getPmemAllocatedForContainers());
  assertEquals(expVmem, cm.getVmemAllocatedForContainers());
  assertEquals(false, cm.isPmemCheckEnabled());
  assertEquals(true, cm.isVmemCheckEnabled());
}
 

public ContainerInfo(final Context nmContext, final Container container,
     String requestUri, String pathPrefix) {

  this.id = container.getContainerId().toString();
  this.nodeId = nmContext.getNodeId().toString();
  ContainerStatus containerData = container.cloneAndGetContainerStatus();
  this.exitCode = containerData.getExitStatus();
  this.exitStatus =
      (this.exitCode == ContainerExitStatus.INVALID) ?
          "N/A" : String.valueOf(exitCode);
  this.state = container.getContainerState().toString();
  this.diagnostics = containerData.getDiagnostics();
  if (this.diagnostics == null || this.diagnostics.isEmpty()) {
    this.diagnostics = "";
  }

  this.user = container.getUser();
  Resource res = container.getResource();
  if (res != null) {
    this.totalMemoryNeededMB = res.getMemory();
    this.totalVCoresNeeded = res.getVirtualCores();
  }
  this.containerLogsShortLink = ujoin("containerlogs", this.id,
      container.getUser());

  if (requestUri == null) {
    requestUri = "";
  }
  if (pathPrefix == null) {
    pathPrefix = "";
  }
  this.containerLogsLink = join(requestUri, pathPrefix,
      this.containerLogsShortLink);
}
 

public WebServer(Context nmContext, ResourceView resourceView,
    ApplicationACLsManager aclsManager,
    LocalDirsHandlerService dirsHandler) {
  super(WebServer.class.getName());
  this.nmContext = nmContext;
  this.nmWebApp = new NMWebApp(resourceView, aclsManager, dirsHandler);
}
 

@Inject
public NMWebServices(final Context nm, final ResourceView view,
    final WebApp webapp) {
  this.nmContext = nm;
  this.rview = view;
  this.webapp = webapp;
}
 

private static Application getApplicationForContainer(ContainerId containerId,
    Context context) {
  ApplicationId applicationId = containerId.getApplicationAttemptId()
      .getApplicationId();
  Application application = context.getApplications().get(
      applicationId);
  
  if (application == null) {
    throw new NotFoundException(
        "Unknown container. Container either has not started or "
            + "has already completed or "
            + "doesn't belong to this node at all.");
  }
  return application;
}
 

public ApplicationImpl(Dispatcher dispatcher, String user, ApplicationId appId,
    Credentials credentials, Context context) {
  this.dispatcher = dispatcher;
  this.user = user;
  this.appId = appId;
  this.credentials = credentials;
  this.aclsManager = context.getApplicationACLsManager();
  this.context = context;
  ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
  readLock = lock.readLock();
  writeLock = lock.writeLock();
  stateMachine = stateMachineFactory.make(this);
}