ClientRMService extends AbstractService implements
    ApplicationClientProtocol { @Override public GetLabelsToNodesResponse getLabelsToNodes( GetLabelsToNodesRequest request) throws YarnException, IOException { RMNodeLabelsManager labelsMgr = rmContext.getNodeLabelManager(); if (request.getNodeLabels() == null || request.getNodeLabels().isEmpty()) { return GetLabelsToNodesResponse.newInstance(labelsMgr.getLabelsToNodes()); } else { return GetLabelsToNodesResponse.newInstance( labelsMgr.getLabelsToNodes(request.getNodeLabels())); } } 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 FailApplicationAttemptResponse failApplicationAttempt(
      FailApplicationAttemptRequest request); @SuppressWarnings("unchecked") @Override KillApplicationResponse forceKillApplication(
      KillApplicationRequest request); @Override GetClusterMetricsResponse getClusterMetrics(
      GetClusterMetricsRequest request); @Override GetApplicationsResponse getApplications(GetApplicationsRequest request); @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 GetNewReservationResponse getNewReservation(
      GetNewReservationRequest request); @Override ReservationSubmissionResponse submitReservation(
      ReservationSubmissionRequest request); @Override ReservationUpdateResponse updateReservation(
      ReservationUpdateRequest request); @Override ReservationDeleteResponse deleteReservation(
      ReservationDeleteRequest request); @Override ReservationListResponse listReservations(
        ReservationListRequest requestInfo); @Override GetNodesToLabelsResponse getNodeToLabels(
      GetNodesToLabelsRequest request); @Override GetLabelsToNodesResponse getLabelsToNodes(
      GetLabelsToNodesRequest request); @Override GetClusterNodeLabelsResponse getClusterNodeLabels(
      GetClusterNodeLabelsRequest request); @Override UpdateApplicationPriorityResponse updateApplicationPriority(
      UpdateApplicationPriorityRequest request); @SuppressWarnings("unchecked") @Override SignalContainerResponse signalToContainer(
      SignalContainerRequest request); @Override UpdateApplicationTimeoutsResponse updateApplicationTimeouts(
      UpdateApplicationTimeoutsRequest request); @Override GetAllResourceProfilesResponse getResourceProfiles(
      GetAllResourceProfilesRequest request); @Override GetResourceProfileResponse getResourceProfile(
      GetResourceProfileRequest request); @Override GetAllResourceTypeInfoResponse getResourceTypeInfo(
      GetAllResourceTypeInfoRequest request); @Override GetAttributesToNodesResponse getAttributesToNodes(
      GetAttributesToNodesRequest request); @Override GetClusterNodeAttributesResponse getClusterNodeAttributes(
      GetClusterNodeAttributesRequest request); @Override GetNodesToAttributesResponse getNodesToAttributes(
      GetNodesToAttributesRequest request); @VisibleForTesting void setDisplayPerUserApps(boolean displayPerUserApps);  }
@Test public void testGetLabelsToNodes() throws Exception { MockRM rm = new MockRM() { protected ClientRMService createClientRMService() { return new ClientRMService(this.rmContext, scheduler, this.rmAppManager, this.applicationACLsManager, this.queueACLsManager, this.getRMContext() .getRMDelegationTokenSecretManager()); }; }; rm.start(); NodeLabel labelX = NodeLabel.newInstance("x", false); NodeLabel labelY = NodeLabel.newInstance("y", false); NodeLabel labelZ = NodeLabel.newInstance("z", false); RMNodeLabelsManager labelsMgr = rm.getRMContext().getNodeLabelManager(); labelsMgr.addToCluserNodeLabels(ImmutableSet.of(labelX, labelY, labelZ)); NodeId node1A = NodeId.newInstance("host1", 1234); NodeId node1B = NodeId.newInstance("host1", 5678); NodeId node2A = NodeId.newInstance("host2", 1234); NodeId node3A = NodeId.newInstance("host3", 1234); NodeId node3B = NodeId.newInstance("host3", 5678); Map<NodeId, Set<String>> map = new HashMap<NodeId, Set<String>>(); map.put(node1A, ImmutableSet.of("x")); map.put(node1B, ImmutableSet.of("z")); map.put(node2A, ImmutableSet.of("y")); map.put(node3A, ImmutableSet.of("y")); map.put(node3B, ImmutableSet.of("z")); labelsMgr.replaceLabelsOnNode(map); Configuration conf = new Configuration(); YarnRPC rpc = YarnRPC.create(conf); InetSocketAddress rmAddress = rm.getClientRMService().getBindAddress(); LOG.info("Connecting to ResourceManager at " + rmAddress); ApplicationClientProtocol client = (ApplicationClientProtocol) rpc .getProxy(ApplicationClientProtocol.class, rmAddress, conf); GetClusterNodeLabelsResponse response = client .getClusterNodeLabels(GetClusterNodeLabelsRequest.newInstance()); Assert.assertTrue(response.getNodeLabelList().containsAll( Arrays.asList(labelX, labelY, labelZ))); GetLabelsToNodesResponse response1 = client .getLabelsToNodes(GetLabelsToNodesRequest.newInstance()); Map<String, Set<NodeId>> labelsToNodes = response1.getLabelsToNodes(); Assert.assertTrue(labelsToNodes.keySet().containsAll( Arrays.asList(labelX.getName(), labelY.getName(), labelZ.getName()))); Assert.assertTrue(labelsToNodes.get(labelX.getName()).containsAll( Arrays.asList(node1A))); Assert.assertTrue(labelsToNodes.get(labelY.getName()).containsAll( Arrays.asList(node2A, node3A))); Assert.assertTrue(labelsToNodes.get(labelZ.getName()).containsAll( Arrays.asList(node1B, node3B))); Set<String> setlabels = new HashSet<String>(Arrays.asList(new String[]{"x", "z"})); GetLabelsToNodesResponse response2 = client .getLabelsToNodes(GetLabelsToNodesRequest.newInstance(setlabels)); labelsToNodes = response2.getLabelsToNodes(); Assert.assertTrue(labelsToNodes.keySet().containsAll( Arrays.asList(labelX.getName(), labelZ.getName()))); Assert.assertTrue(labelsToNodes.get(labelX.getName()).containsAll( Arrays.asList(node1A))); Assert.assertTrue(labelsToNodes.get(labelZ.getName()).containsAll( Arrays.asList(node1B, node3B))); assertThat(labelsToNodes.get(labelY.getName())).isNull(); rpc.stopProxy(client, conf); rm.close(); }