ClientRMService extends AbstractService implements
    ApplicationClientProtocol { @Override public SubmitApplicationResponse submitApplication( SubmitApplicationRequest request) throws YarnException { ApplicationSubmissionContext submissionContext = request .getApplicationSubmissionContext(); ApplicationId applicationId = submissionContext.getApplicationId(); String user = null; try { user = UserGroupInformation.getCurrentUser().getShortUserName(); } catch (IOException ie) { LOG.warn("Unable to get the current user.", ie); RMAuditLogger.logFailure(user, AuditConstants.SUBMIT_APP_REQUEST, ie.getMessage(), "ClientRMService", "Exception in submitting application", applicationId); throw RPCUtil.getRemoteException(ie); } if (rmContext.getRMApps().get(applicationId) != null) { LOG.info("This is an earlier submitted application: " + applicationId); return SubmitApplicationResponse.newInstance(); } if (submissionContext.getQueue() == null) { submissionContext.setQueue(YarnConfiguration.DEFAULT_QUEUE_NAME); } if (submissionContext.getApplicationName() == null) { submissionContext.setApplicationName( YarnConfiguration.DEFAULT_APPLICATION_NAME); } if (submissionContext.getApplicationType() == null) { submissionContext .setApplicationType(YarnConfiguration.DEFAULT_APPLICATION_TYPE); } else { if (submissionContext.getApplicationType().length() > YarnConfiguration.APPLICATION_TYPE_LENGTH) { submissionContext.setApplicationType(submissionContext .getApplicationType().substring(0, YarnConfiguration.APPLICATION_TYPE_LENGTH)); } } try { rmAppManager.submitApplication(submissionContext, System.currentTimeMillis(), user); LOG.info("Application with id " + applicationId.getId() + " submitted by user " + user); RMAuditLogger.logSuccess(user, AuditConstants.SUBMIT_APP_REQUEST, "ClientRMService", applicationId); } catch (YarnException e) { LOG.info("Exception in submitting application with id " + applicationId.getId(), e); RMAuditLogger.logFailure(user, AuditConstants.SUBMIT_APP_REQUEST, e.getMessage(), "ClientRMService", "Exception in submitting application", applicationId); throw e; } SubmitApplicationResponse response = recordFactory .newRecordInstance(SubmitApplicationResponse.class); return response; } ClientRMService(RMContext rmContext, YarnScheduler scheduler,
      RMAppManager rmAppManager, ApplicationACLsManager applicationACLsManager,
      QueueACLsManager queueACLsManager,
      RMDelegationTokenSecretManager rmDTSecretManager);  ClientRMService(RMContext rmContext, YarnScheduler scheduler,
      RMAppManager rmAppManager, ApplicationACLsManager applicationACLsManager,
      QueueACLsManager queueACLsManager,
      RMDelegationTokenSecretManager rmDTSecretManager, Clock clock); @Private InetSocketAddress getBindAddress(); @Override GetNewApplicationResponse getNewApplication(
      GetNewApplicationRequest request); @Override GetApplicationReportResponse getApplicationReport(
      GetApplicationReportRequest request); @Override GetApplicationAttemptReportResponse getApplicationAttemptReport(
      GetApplicationAttemptReportRequest request); @Override GetApplicationAttemptsResponse getApplicationAttempts(
      GetApplicationAttemptsRequest request); @Override GetContainerReportResponse getContainerReport(
      GetContainerReportRequest request); @Override GetContainersResponse getContainers(GetContainersRequest request); @Override SubmitApplicationResponse submitApplication(
      SubmitApplicationRequest request); @SuppressWarnings("unchecked") @Override KillApplicationResponse forceKillApplication(
      KillApplicationRequest request); @Override GetClusterMetricsResponse getClusterMetrics(
      GetClusterMetricsRequest request); @Override GetApplicationsResponse getApplications(
      GetApplicationsRequest request); @Private GetApplicationsResponse getApplications(
      GetApplicationsRequest request, boolean caseSensitive); @Override GetClusterNodesResponse getClusterNodes(GetClusterNodesRequest request); @Override GetQueueInfoResponse getQueueInfo(GetQueueInfoRequest request); @Override GetQueueUserAclsInfoResponse getQueueUserAcls(
      GetQueueUserAclsInfoRequest request); @Override GetDelegationTokenResponse getDelegationToken(
      GetDelegationTokenRequest request); @Override RenewDelegationTokenResponse renewDelegationToken(
      RenewDelegationTokenRequest request); @Override CancelDelegationTokenResponse cancelDelegationToken(
      CancelDelegationTokenRequest request); @SuppressWarnings("unchecked") @Override MoveApplicationAcrossQueuesResponse moveApplicationAcrossQueues(
      MoveApplicationAcrossQueuesRequest request); @VisibleForTesting Server getServer(); @Override ReservationSubmissionResponse submitReservation(
      ReservationSubmissionRequest request); @Override ReservationUpdateResponse updateReservation(
      ReservationUpdateRequest request); @Override ReservationDeleteResponse deleteReservation(
      ReservationDeleteRequest request); @Override GetNodesToLabelsResponse getNodeToLabels(
      GetNodesToLabelsRequest request); @Override GetClusterNodeLabelsResponse getClusterNodeLabels(
      GetClusterNodeLabelsRequest request);  }
@Test(timeout=4000) public void testConcurrentAppSubmit() throws IOException, InterruptedException, BrokenBarrierException, YarnException { YarnScheduler yarnScheduler = mockYarnScheduler(); RMContext rmContext = mock(RMContext.class); mockRMContext(yarnScheduler, rmContext); RMStateStore stateStore = mock(RMStateStore.class); when(rmContext.getStateStore()).thenReturn(stateStore); RMAppManager appManager = new RMAppManager(rmContext, yarnScheduler, null, mock(ApplicationACLsManager.class), new Configuration()); final ApplicationId appId1 = getApplicationId(100); final ApplicationId appId2 = getApplicationId(101); final SubmitApplicationRequest submitRequest1 = mockSubmitAppRequest( appId1, null, null); final SubmitApplicationRequest submitRequest2 = mockSubmitAppRequest( appId2, null, null); final CyclicBarrier startBarrier = new CyclicBarrier(2); final CyclicBarrier endBarrier = new CyclicBarrier(2); @SuppressWarnings("rawtypes") EventHandler eventHandler = new EventHandler() { @Override public void handle(Event rawEvent) { if (rawEvent instanceof RMAppEvent) { RMAppEvent event = (RMAppEvent) rawEvent; if (event.getApplicationId().equals(appId1)) { try { startBarrier.await(); endBarrier.await(); } catch (BrokenBarrierException e) { LOG.warn("Broken Barrier", e); } catch (InterruptedException e) { LOG.warn("Interrupted while awaiting barriers", e); } } } } }; when(rmContext.getDispatcher().getEventHandler()).thenReturn(eventHandler); final ClientRMService rmService = new ClientRMService(rmContext, yarnScheduler, appManager, null, null, null); Thread t = new Thread() { @Override public void run() { try { rmService.submitApplication(submitRequest1); } catch (YarnException e) {} } }; t.start(); startBarrier.await(); rmService.submitApplication(submitRequest2); endBarrier.await(); t.join(); }