Examples with NodeReport org.apache.hadoop.yarn.api.records.NodeReport used on opensource projects

Example 6 with NodeReport

use of org.apache.hadoop.yarn.api.records.NodeReport in project hadoop by apache.

the class BaseAMRMProxyE2ETest method createAllocateRequest.

protected AllocateRequest createAllocateRequest(List<NodeReport> listNode) {
    // The test needs AMRMClient to create a real allocate request
    AMRMClientImpl<AMRMClient.ContainerRequest> amClient = new AMRMClientImpl<>();
    Resource capability = Resource.newInstance(1024, 2);
    Priority priority = Priority.newInstance(1);
    List<NodeReport> nodeReports = listNode;
    String node = nodeReports.get(0).getNodeId().getHost();
    String[] nodes = new String[] { node };
    AMRMClient.ContainerRequest storedContainer1 = new AMRMClient.ContainerRequest(capability, nodes, null, priority);
    amClient.addContainerRequest(storedContainer1);
    amClient.addContainerRequest(storedContainer1);
    List<ResourceRequest> resourceAsk = new ArrayList<>();
    for (ResourceRequest rr : amClient.ask) {
        resourceAsk.add(rr);
    }
    ResourceBlacklistRequest resourceBlacklistRequest = ResourceBlacklistRequest.newInstance(new ArrayList<>(), new ArrayList<>());
    int responseId = 1;
    return AllocateRequest.newInstance(responseId, 0, resourceAsk, new ArrayList<>(), resourceBlacklistRequest);
}

Example 7 with NodeReport

use of org.apache.hadoop.yarn.api.records.NodeReport in project hadoop by apache.

the class TestDistributedScheduling method testAMOpportunistic.

/**
   * Check if an AM can ask for opportunistic containers and get them.
   * @throws Exception
   */
@Test
public void testAMOpportunistic() throws Exception {
    // Basic container to request
    Resource capability = Resource.newInstance(1024, 1);
    Priority priority = Priority.newInstance(1);
    // Get the cluster topology
    List<NodeReport> nodeReports = rmClient.getNodeReports(NodeState.RUNNING);
    String node = nodeReports.get(0).getNodeId().getHost();
    String rack = nodeReports.get(0).getRackName();
    String[] nodes = new String[] { node };
    String[] racks = new String[] { rack };
    // Create an AM to request resources
    AMRMClient<AMRMClient.ContainerRequest> amClient = null;
    try {
        amClient = new AMRMClientImpl<AMRMClient.ContainerRequest>(client);
        amClient.init(yarnConf);
        amClient.start();
        amClient.registerApplicationMaster(NetUtils.getHostname(), 1024, "");
        // AM requests an opportunistic container
        ExecutionTypeRequest execTypeRequest = ExecutionTypeRequest.newInstance(ExecutionType.OPPORTUNISTIC, true);
        ContainerRequest containerRequest = new AMRMClient.ContainerRequest(capability, nodes, racks, priority, 0, true, null, execTypeRequest);
        amClient.addContainerRequest(containerRequest);
        // Wait until the container is allocated
        ContainerId opportunisticContainerId = null;
        for (int i = 0; i < 10 && opportunisticContainerId == null; i++) {
            AllocateResponse allocResponse = amClient.allocate(0.1f);
            List<Container> allocatedContainers = allocResponse.getAllocatedContainers();
            for (Container allocatedContainer : allocatedContainers) {
                // Check that this is the container we required
                assertEquals(ExecutionType.OPPORTUNISTIC, allocatedContainer.getExecutionType());
                opportunisticContainerId = allocatedContainer.getId();
            }
            sleep(100);
        }
        assertNotNull(opportunisticContainerId);
        // The RM sees the container as OPPORTUNISTIC
        ResourceScheduler scheduler = cluster.getResourceManager().getResourceScheduler();
        RMContainer rmContainer = scheduler.getRMContainer(opportunisticContainerId);
        assertEquals(ExecutionType.OPPORTUNISTIC, rmContainer.getExecutionType());
        // Release the opportunistic container
        amClient.releaseAssignedContainer(opportunisticContainerId);
        // Wait for the release container to appear
        boolean released = false;
        for (int i = 0; i < 10 && !released; i++) {
            AllocateResponse allocResponse = amClient.allocate(0.1f);
            List<ContainerStatus> completedContainers = allocResponse.getCompletedContainersStatuses();
            for (ContainerStatus completedContainer : completedContainers) {
                ContainerId completedContainerId = completedContainer.getContainerId();
                assertEquals(completedContainerId, opportunisticContainerId);
                released = true;
            }
            if (!released) {
                sleep(100);
            }
        }
        assertTrue(released);
        // The RM shouldn't see the container anymore
        rmContainer = scheduler.getRMContainer(opportunisticContainerId);
        assertNull(rmContainer);
        // Clean the AM
        amClient.unregisterApplicationMaster(FinalApplicationStatus.SUCCEEDED, null, null);
    } finally {
        if (amClient != null && amClient.getServiceState() == Service.STATE.STARTED) {
            amClient.close();
        }
    }
}

Example 8 with NodeReport

use of org.apache.hadoop.yarn.api.records.NodeReport in project hadoop by apache.

the class TestDistributedScheduling method testAMRMClient.

/**
   * Validates if AMRMClient can be used with Distributed Scheduling turned on.
   *
   * @throws Exception
   */
@Test(timeout = 120000)
@SuppressWarnings("unchecked")
public void testAMRMClient() throws Exception {
    AMRMClientImpl<AMRMClient.ContainerRequest> amClient = null;
    try {
        Priority priority = Priority.newInstance(1);
        Priority priority2 = Priority.newInstance(2);
        Resource capability = Resource.newInstance(1024, 1);
        List<NodeReport> nodeReports = rmClient.getNodeReports(NodeState.RUNNING);
        String node = nodeReports.get(0).getNodeId().getHost();
        String rack = nodeReports.get(0).getRackName();
        String[] nodes = new String[] { node };
        String[] racks = new String[] { rack };
        // start am rm client
        amClient = new AMRMClientImpl(client);
        amClient.init(yarnConf);
        amClient.start();
        amClient.registerApplicationMaster(NetUtils.getHostname(), 1024, "");
        assertEquals(0, amClient.ask.size());
        assertEquals(0, amClient.release.size());
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, null, null, priority2, 0, true, null, ExecutionTypeRequest.newInstance(ExecutionType.OPPORTUNISTIC, true)));
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, null, null, priority2, 0, true, null, ExecutionTypeRequest.newInstance(ExecutionType.OPPORTUNISTIC, true)));
        amClient.removeContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.removeContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.removeContainerRequest(new AMRMClient.ContainerRequest(capability, null, null, priority2, 0, true, null, ExecutionTypeRequest.newInstance(ExecutionType.OPPORTUNISTIC, true)));
        RemoteRequestsTable<ContainerRequest> remoteRequestsTable = amClient.getTable(0);
        int containersRequestedNode = remoteRequestsTable.get(priority, node, ExecutionType.GUARANTEED, capability).remoteRequest.getNumContainers();
        int containersRequestedRack = remoteRequestsTable.get(priority, rack, ExecutionType.GUARANTEED, capability).remoteRequest.getNumContainers();
        int containersRequestedAny = remoteRequestsTable.get(priority, ResourceRequest.ANY, ExecutionType.GUARANTEED, capability).remoteRequest.getNumContainers();
        int oppContainersRequestedAny = remoteRequestsTable.get(priority2, ResourceRequest.ANY, ExecutionType.OPPORTUNISTIC, capability).remoteRequest.getNumContainers();
        assertEquals(2, containersRequestedNode);
        assertEquals(2, containersRequestedRack);
        assertEquals(2, containersRequestedAny);
        assertEquals(1, oppContainersRequestedAny);
        assertEquals(4, amClient.ask.size());
        assertEquals(0, amClient.release.size());
        // RM should allocate container within 2 calls to allocate()
        int allocatedContainerCount = 0;
        int iterationsLeft = 10;
        Set<ContainerId> releases = new TreeSet<>();
        amClient.getNMTokenCache().clearCache();
        Assert.assertEquals(0, amClient.getNMTokenCache().numberOfTokensInCache());
        HashMap<String, Token> receivedNMTokens = new HashMap<>();
        while (allocatedContainerCount < (containersRequestedAny + oppContainersRequestedAny) && iterationsLeft-- > 0) {
            AllocateResponse allocResponse = amClient.allocate(0.1f);
            assertEquals(0, amClient.ask.size());
            assertEquals(0, amClient.release.size());
            allocatedContainerCount += allocResponse.getAllocatedContainers().size();
            for (Container container : allocResponse.getAllocatedContainers()) {
                ContainerId rejectContainerId = container.getId();
                releases.add(rejectContainerId);
            }
            for (NMToken token : allocResponse.getNMTokens()) {
                String nodeID = token.getNodeId().toString();
                receivedNMTokens.put(nodeID, token.getToken());
            }
            if (allocatedContainerCount < containersRequestedAny) {
                // sleep to let NM's heartbeat to RM and trigger allocations
                sleep(100);
            }
        }
        assertEquals(allocatedContainerCount, containersRequestedAny + oppContainersRequestedAny);
        for (ContainerId rejectContainerId : releases) {
            amClient.releaseAssignedContainer(rejectContainerId);
        }
        assertEquals(3, amClient.release.size());
        assertEquals(0, amClient.ask.size());
        // need to tell the AMRMClient that we dont need these resources anymore
        amClient.removeContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.removeContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.removeContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority2, 0, true, null, ExecutionTypeRequest.newInstance(ExecutionType.OPPORTUNISTIC, true)));
        assertEquals(4, amClient.ask.size());
        // test RPC exception handling
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
        amClient.addContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority2, 0, true, null, ExecutionTypeRequest.newInstance(ExecutionType.OPPORTUNISTIC, true)));
        final AMRMClient amc = amClient;
        ApplicationMasterProtocol realRM = amClient.rmClient;
        try {
            ApplicationMasterProtocol mockRM = mock(ApplicationMasterProtocol.class);
            when(mockRM.allocate(any(AllocateRequest.class))).thenAnswer(new Answer<AllocateResponse>() {

                public AllocateResponse answer(InvocationOnMock invocation) throws Exception {
                    amc.removeContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
                    amc.removeContainerRequest(new AMRMClient.ContainerRequest(capability, nodes, racks, priority));
                    amc.removeContainerRequest(new AMRMClient.ContainerRequest(capability, null, null, priority2, 0, true, null, ExecutionTypeRequest.newInstance(ExecutionType.OPPORTUNISTIC, true)));
                    throw new Exception();
                }
            });
            amClient.rmClient = mockRM;
            amClient.allocate(0.1f);
        } catch (Exception ioe) {
        } finally {
            amClient.rmClient = realRM;
        }
        assertEquals(3, amClient.release.size());
        assertEquals(6, amClient.ask.size());
        iterationsLeft = 3;
        // do a few iterations to ensure RM is not going send new containers
        while (iterationsLeft-- > 0) {
            // inform RM of rejection
            AllocateResponse allocResponse = amClient.allocate(0.1f);
            // RM did not send new containers because AM does not need any
            assertEquals(0, allocResponse.getAllocatedContainers().size());
            if (allocResponse.getCompletedContainersStatuses().size() > 0) {
                for (ContainerStatus cStatus : allocResponse.getCompletedContainersStatuses()) {
                    if (releases.contains(cStatus.getContainerId())) {
                        assertEquals(cStatus.getState(), ContainerState.COMPLETE);
                        assertEquals(-100, cStatus.getExitStatus());
                        releases.remove(cStatus.getContainerId());
                    }
                }
            }
            if (iterationsLeft > 0) {
                // sleep to make sure NM's heartbeat
                sleep(100);
            }
        }
        assertEquals(0, amClient.ask.size());
        assertEquals(0, amClient.release.size());
        amClient.unregisterApplicationMaster(FinalApplicationStatus.SUCCEEDED, null, null);
    } finally {
        if (amClient != null && amClient.getServiceState() == Service.STATE.STARTED) {
            amClient.stop();
        }
    }
}

Example 9 with NodeReport

use of org.apache.hadoop.yarn.api.records.NodeReport in project hadoop by apache.

the class ClientRMService method getClusterNodes.

@Override
public GetClusterNodesResponse getClusterNodes(GetClusterNodesRequest request) throws YarnException {
    GetClusterNodesResponse response = recordFactory.newRecordInstance(GetClusterNodesResponse.class);
    EnumSet<NodeState> nodeStates = request.getNodeStates();
    if (nodeStates == null || nodeStates.isEmpty()) {
        nodeStates = EnumSet.allOf(NodeState.class);
    }
    Collection<RMNode> nodes = RMServerUtils.queryRMNodes(rmContext, nodeStates);
    List<NodeReport> nodeReports = new ArrayList<NodeReport>(nodes.size());
    for (RMNode nodeInfo : nodes) {
        nodeReports.add(createNodeReports(nodeInfo));
    }
    response.setNodeReports(nodeReports);
    return response;
}

Example 10 with NodeReport

use of org.apache.hadoop.yarn.api.records.NodeReport in project hadoop by apache.

the class Client method run.

/**
   * Main run function for the client
   * @return true if application completed successfully
   * @throws IOException
   * @throws YarnException
   */
public boolean run() throws IOException, YarnException {
    LOG.info("Running Client");
    yarnClient.start();
    YarnClusterMetrics clusterMetrics = yarnClient.getYarnClusterMetrics();
    LOG.info("Got Cluster metric info from ASM" + ", numNodeManagers=" + clusterMetrics.getNumNodeManagers());
    List<NodeReport> clusterNodeReports = yarnClient.getNodeReports(NodeState.RUNNING);
    LOG.info("Got Cluster node info from ASM");
    for (NodeReport node : clusterNodeReports) {
        LOG.info("Got node report from ASM for" + ", nodeId=" + node.getNodeId() + ", nodeAddress=" + node.getHttpAddress() + ", nodeRackName=" + node.getRackName() + ", nodeNumContainers=" + node.getNumContainers());
    }
    QueueInfo queueInfo = yarnClient.getQueueInfo(this.amQueue);
    LOG.info("Queue info" + ", queueName=" + queueInfo.getQueueName() + ", queueCurrentCapacity=" + queueInfo.getCurrentCapacity() + ", queueMaxCapacity=" + queueInfo.getMaximumCapacity() + ", queueApplicationCount=" + queueInfo.getApplications().size() + ", queueChildQueueCount=" + queueInfo.getChildQueues().size());
    List<QueueUserACLInfo> listAclInfo = yarnClient.getQueueAclsInfo();
    for (QueueUserACLInfo aclInfo : listAclInfo) {
        for (QueueACL userAcl : aclInfo.getUserAcls()) {
            LOG.info("User ACL Info for Queue" + ", queueName=" + aclInfo.getQueueName() + ", userAcl=" + userAcl.name());
        }
    }
    if (domainId != null && domainId.length() > 0 && toCreateDomain) {
        prepareTimelineDomain();
    }
    // Get a new application id
    YarnClientApplication app = yarnClient.createApplication();
    GetNewApplicationResponse appResponse = app.getNewApplicationResponse();
    // TODO get min/max resource capabilities from RM and change memory ask if needed
    // If we do not have min/max, we may not be able to correctly request 
    // the required resources from the RM for the app master
    // Memory ask has to be a multiple of min and less than max. 
    // Dump out information about cluster capability as seen by the resource manager
    long maxMem = appResponse.getMaximumResourceCapability().getMemorySize();
    LOG.info("Max mem capability of resources in this cluster " + maxMem);
    // A resource ask cannot exceed the max. 
    if (amMemory > maxMem) {
        LOG.info("AM memory specified above max threshold of cluster. Using max value." + ", specified=" + amMemory + ", max=" + maxMem);
        amMemory = maxMem;
    }
    int maxVCores = appResponse.getMaximumResourceCapability().getVirtualCores();
    LOG.info("Max virtual cores capability of resources in this cluster " + maxVCores);
    if (amVCores > maxVCores) {
        LOG.info("AM virtual cores specified above max threshold of cluster. " + "Using max value." + ", specified=" + amVCores + ", max=" + maxVCores);
        amVCores = maxVCores;
    }
    // set the application name
    ApplicationSubmissionContext appContext = app.getApplicationSubmissionContext();
    ApplicationId appId = appContext.getApplicationId();
    appContext.setKeepContainersAcrossApplicationAttempts(keepContainers);
    appContext.setApplicationName(appName);
    if (attemptFailuresValidityInterval >= 0) {
        appContext.setAttemptFailuresValidityInterval(attemptFailuresValidityInterval);
    }
    Set<String> tags = new HashSet<String>();
    if (flowName != null) {
        tags.add(TimelineUtils.generateFlowNameTag(flowName));
    }
    if (flowVersion != null) {
        tags.add(TimelineUtils.generateFlowVersionTag(flowVersion));
    }
    if (flowRunId != 0) {
        tags.add(TimelineUtils.generateFlowRunIdTag(flowRunId));
    }
    appContext.setApplicationTags(tags);
    // set local resources for the application master
    // local files or archives as needed
    // In this scenario, the jar file for the application master is part of the local resources			
    Map<String, LocalResource> localResources = new HashMap<String, LocalResource>();
    LOG.info("Copy App Master jar from local filesystem and add to local environment");
    // Copy the application master jar to the filesystem 
    // Create a local resource to point to the destination jar path 
    FileSystem fs = FileSystem.get(conf);
    addToLocalResources(fs, appMasterJar, appMasterJarPath, appId.toString(), localResources, null);
    // Set the log4j properties if needed 
    if (!log4jPropFile.isEmpty()) {
        addToLocalResources(fs, log4jPropFile, log4jPath, appId.toString(), localResources, null);
    }
    // The shell script has to be made available on the final container(s)
    // where it will be executed. 
    // To do this, we need to first copy into the filesystem that is visible 
    // to the yarn framework. 
    // We do not need to set this as a local resource for the application 
    // master as the application master does not need it. 		
    String hdfsShellScriptLocation = "";
    long hdfsShellScriptLen = 0;
    long hdfsShellScriptTimestamp = 0;
    if (!shellScriptPath.isEmpty()) {
        Path shellSrc = new Path(shellScriptPath);
        String shellPathSuffix = appName + "/" + appId.toString() + "/" + SCRIPT_PATH;
        Path shellDst = new Path(fs.getHomeDirectory(), shellPathSuffix);
        fs.copyFromLocalFile(false, true, shellSrc, shellDst);
        hdfsShellScriptLocation = shellDst.toUri().toString();
        FileStatus shellFileStatus = fs.getFileStatus(shellDst);
        hdfsShellScriptLen = shellFileStatus.getLen();
        hdfsShellScriptTimestamp = shellFileStatus.getModificationTime();
    }
    if (!shellCommand.isEmpty()) {
        addToLocalResources(fs, null, shellCommandPath, appId.toString(), localResources, shellCommand);
    }
    if (shellArgs.length > 0) {
        addToLocalResources(fs, null, shellArgsPath, appId.toString(), localResources, StringUtils.join(shellArgs, " "));
    }
    // Set the necessary security tokens as needed
    //amContainer.setContainerTokens(containerToken);
    // Set the env variables to be setup in the env where the application master will be run
    LOG.info("Set the environment for the application master");
    Map<String, String> env = new HashMap<String, String>();
    // put location of shell script into env
    // using the env info, the application master will create the correct local resource for the 
    // eventual containers that will be launched to execute the shell scripts
    env.put(DSConstants.DISTRIBUTEDSHELLSCRIPTLOCATION, hdfsShellScriptLocation);
    env.put(DSConstants.DISTRIBUTEDSHELLSCRIPTTIMESTAMP, Long.toString(hdfsShellScriptTimestamp));
    env.put(DSConstants.DISTRIBUTEDSHELLSCRIPTLEN, Long.toString(hdfsShellScriptLen));
    if (domainId != null && domainId.length() > 0) {
        env.put(DSConstants.DISTRIBUTEDSHELLTIMELINEDOMAIN, domainId);
    }
    // Add AppMaster.jar location to classpath 		
    // At some point we should not be required to add 
    // the hadoop specific classpaths to the env. 
    // It should be provided out of the box. 
    // For now setting all required classpaths including
    // the classpath to "." for the application jar
    StringBuilder classPathEnv = new StringBuilder(Environment.CLASSPATH.$$()).append(ApplicationConstants.CLASS_PATH_SEPARATOR).append("./*");
    for (String c : conf.getStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH, YarnConfiguration.DEFAULT_YARN_CROSS_PLATFORM_APPLICATION_CLASSPATH)) {
        classPathEnv.append(ApplicationConstants.CLASS_PATH_SEPARATOR);
        classPathEnv.append(c.trim());
    }
    classPathEnv.append(ApplicationConstants.CLASS_PATH_SEPARATOR).append("./log4j.properties");
    // add the runtime classpath needed for tests to work
    if (conf.getBoolean(YarnConfiguration.IS_MINI_YARN_CLUSTER, false)) {
        classPathEnv.append(':');
        classPathEnv.append(System.getProperty("java.class.path"));
    }
    env.put("CLASSPATH", classPathEnv.toString());
    // Set the necessary command to execute the application master 
    Vector<CharSequence> vargs = new Vector<CharSequence>(30);
    // Set java executable command 
    LOG.info("Setting up app master command");
    vargs.add(Environment.JAVA_HOME.$$() + "/bin/java");
    // Set Xmx based on am memory size
    vargs.add("-Xmx" + amMemory + "m");
    // Set class name 
    vargs.add(appMasterMainClass);
    // Set params for Application Master
    vargs.add("--container_memory " + String.valueOf(containerMemory));
    vargs.add("--container_vcores " + String.valueOf(containerVirtualCores));
    vargs.add("--num_containers " + String.valueOf(numContainers));
    if (null != nodeLabelExpression) {
        appContext.setNodeLabelExpression(nodeLabelExpression);
    }
    vargs.add("--priority " + String.valueOf(shellCmdPriority));
    for (Map.Entry<String, String> entry : shellEnv.entrySet()) {
        vargs.add("--shell_env " + entry.getKey() + "=" + entry.getValue());
    }
    if (debugFlag) {
        vargs.add("--debug");
    }
    vargs.addAll(containerRetryOptions);
    vargs.add("1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/AppMaster.stdout");
    vargs.add("2>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/AppMaster.stderr");
    // Get final commmand
    StringBuilder command = new StringBuilder();
    for (CharSequence str : vargs) {
        command.append(str).append(" ");
    }
    LOG.info("Completed setting up app master command " + command.toString());
    List<String> commands = new ArrayList<String>();
    commands.add(command.toString());
    // Set up the container launch context for the application master
    ContainerLaunchContext amContainer = ContainerLaunchContext.newInstance(localResources, env, commands, null, null, null);
    // Set up resource type requirements
    // For now, both memory and vcores are supported, so we set memory and 
    // vcores requirements
    Resource capability = Resource.newInstance(amMemory, amVCores);
    appContext.setResource(capability);
    // Setup security tokens
    if (UserGroupInformation.isSecurityEnabled()) {
        // Note: Credentials class is marked as LimitedPrivate for HDFS and MapReduce
        Credentials credentials = new Credentials();
        String tokenRenewer = YarnClientUtils.getRmPrincipal(conf);
        if (tokenRenewer == null || tokenRenewer.length() == 0) {
            throw new IOException("Can't get Master Kerberos principal for the RM to use as renewer");
        }
        // For now, only getting tokens for the default file-system.
        final Token<?>[] tokens = fs.addDelegationTokens(tokenRenewer, credentials);
        if (tokens != null) {
            for (Token<?> token : tokens) {
                LOG.info("Got dt for " + fs.getUri() + "; " + token);
            }
        }
        DataOutputBuffer dob = new DataOutputBuffer();
        credentials.writeTokenStorageToStream(dob);
        ByteBuffer fsTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
        amContainer.setTokens(fsTokens);
    }
    appContext.setAMContainerSpec(amContainer);
    // Set the priority for the application master
    // TODO - what is the range for priority? how to decide? 
    Priority pri = Priority.newInstance(amPriority);
    appContext.setPriority(pri);
    // Set the queue to which this application is to be submitted in the RM
    appContext.setQueue(amQueue);
    // Submit the application to the applications manager
    // SubmitApplicationResponse submitResp = applicationsManager.submitApplication(appRequest);
    // Ignore the response as either a valid response object is returned on success 
    // or an exception thrown to denote some form of a failure
    LOG.info("Submitting application to ASM");
    yarnClient.submitApplication(appContext);
    // Monitor the application
    return monitorApplication(appId);
}