Example usage for org.apache.hadoop.yarn.conf YarnConfiguration YARN_APPLICATION_CLASSPATH

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In this page you can find the example usage for org.apache.hadoop.yarn.conf YarnConfiguration YARN_APPLICATION_CLASSPATH.

Prototype

String YARN_APPLICATION_CLASSPATH

To view the source code for org.apache.hadoop.yarn.conf YarnConfiguration YARN_APPLICATION_CLASSPATH.

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Document

CLASSPATH for YARN applications.

Usage

From source file:org.apache.reef.runtime.yarn.YarnClasspathProvider.java

License:Apache License

@Inject
YarnClasspathProvider(final YarnConfiguration yarnConfiguration) {
    boolean needsLegacyClasspath = false; // will be set to true below whenever we encounter issues with the YARN Configuration
    final ClassPathBuilder builder = new ClassPathBuilder();

    try {/*w ww.  j  a va 2s  .c  o  m*/
        // Add the classpath actually configured on this cluster
        final String[] yarnClassPath = yarnConfiguration
                .getTrimmedStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH);
        if (null == yarnClassPath || yarnClassPath.length == 0) {
            needsLegacyClasspath = true;
        } else {
            builder.addAll(yarnClassPath);
        }
        final String[] yarnDefaultClassPath = YarnConfiguration.DEFAULT_YARN_CROSS_PLATFORM_APPLICATION_CLASSPATH;
        if (null == yarnDefaultClassPath || yarnDefaultClassPath.length == 0) {
            LOG.log(Level.SEVERE,
                    "YarnConfiguration.DEFAULT_YARN_CROSS_PLATFORM_APPLICATION_CLASSPATH is empty. This indicates a broken cluster configuration");
            needsLegacyClasspath = true;
        } else {
            builder.addAll(yarnDefaultClassPath);
        }
    } catch (final NoSuchFieldError e) {
        // This means that one of the static fields above aren't actually in YarnConfiguration.
        // The reason for that is most likely that we encounter a really old version of YARN.
        needsLegacyClasspath = true;
        LOG.log(Level.SEVERE, YARN_TOO_OLD_MESSAGE);
    }

    if (needsLegacyClasspath) {
        builder.addAll(LEGACY_CLASSPATH_LIST);
    }

    this.classPathPrefix = builder.getPrefixAsImmutableList();
    this.classPathSuffix = builder.getSuffixAsImmutableList();
    this.logClasspath();
}

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From source file:org.apache.rya.periodic.notification.twill.yarn.PeriodicNotificationTwillRunner.java

License:Apache License

/**
 * Start an instance of the {@link PeriodicNotificationTwillApp}.
 *
 * @param interactive - If true, this method will block until the user terminates this JVM, at which point the
 *            {@link PeriodicNotificationTwillApp} on the YARN cluster will also be terminated. If false, this
 *            method will return after startup.
 *//*from   www .j  a  v a  2 s  .  co m*/
public void startApp(final boolean interactive) {
    final String yarnClasspath = yarnConfiguration.get(YarnConfiguration.YARN_APPLICATION_CLASSPATH,
            Joiner.on(",").join(YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH));
    final List<String> applicationClassPaths = Lists.newArrayList();
    Iterables.addAll(applicationClassPaths, Splitter.on(",").split(yarnClasspath));
    final TwillController controller = twillRunner.prepare(new PeriodicNotificationTwillApp(configFile))
            .addLogHandler(new PrinterLogHandler(
                    new PrintWriter(new OutputStreamWriter(System.out, StandardCharsets.UTF_8), true)))
            .withApplicationClassPaths(applicationClassPaths)
            //.withApplicationArguments(args)
            //.withArguments(runnableName, args)
            // .withBundlerClassAcceptor(new HadoopClassExcluder())
            .start();

    final ResourceReport r = getResourceReport(controller, 5, TimeUnit.MINUTES);
    LOG.info("Received ResourceReport: {}", r);
    LOG.info("{} started successfully!", PeriodicNotificationTwillApp.APPLICATION_NAME);

    if (interactive) {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                try {
                    Futures.getUnchecked(controller.terminate());
                } finally {
                    twillRunner.stop();
                }
            }
        });

        try {
            LOG.info("{} waiting termination by user.  Type ctrl-c to terminate.",
                    PeriodicNotificationTwillApp.class.getSimpleName());
            controller.awaitTerminated();
        } catch (final ExecutionException e) {
            e.printStackTrace();
        }
    }
}

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From source file:org.apache.slider.core.launch.ClasspathConstructor.java

License:Apache License

/**
 * Get the list of JARs from the YARN settings
 * @param config configuration/*  w w  w.  j a  va  2  s .  com*/
 */
public List<String> yarnApplicationClasspath(Configuration config) {
    String[] cp = config.getTrimmedStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH,
            YarnConfiguration.DEFAULT_YARN_CROSS_PLATFORM_APPLICATION_CLASSPATH);
    return cp != null ? Arrays.asList(cp) : new ArrayList<String>(0);

}

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From source file:org.apache.sysml.yarn.DMLYarnClient.java

License:Apache License

private static Map<String, String> constructEnvionmentMap(YarnConfiguration yconf) throws IOException {
    Map<String, String> eMap = new HashMap<>();

    //setup default app master environment
    StringBuilder classpath = new StringBuilder();
    for (String value : yconf.getStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH,
            YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH)) {
        if (classpath.length() > 0)
            classpath.append(File.pathSeparator);
        classpath.append(value.trim());/*from   w w  w. ja v  a2  s.co m*/
    }

    //setup mapreduce appmaster environment (for robustness if not included in default environment)
    //for example, by default HDP 2.2 did not include mapred client libraries in this configuration
    //note: we cannot use MRConfigurationNames.MR_APPLICATION_CLASSPATH because it refers to HDFS and $PWD that needs to be setup
    Map<String, String> env = System.getenv();
    String mapred_home = null;
    //get mapred home via alternative environment variables
    if (env.containsKey(MAPRED_HOME_ENV_CONST)) {
        mapred_home = env.get(MAPRED_HOME_ENV_CONST);
    } else if (env.containsKey(HADOOP_HOME_ENV_CONST)) {
        String tmp = env.get(HADOOP_HOME_ENV_CONST);
        mapred_home = tmp + File.separator + ".." + File.separator + "hadoop-mapreduce";
    }
    //concatenate mapred home libs to classpath
    if (mapred_home != null) {
        if (classpath.length() > 0)
            classpath.append(File.pathSeparator);
        classpath.append(mapred_home + File.separator + "*");
        classpath.append(File.pathSeparator);
        classpath.append(mapred_home + File.separator + "lib" + File.separator + "*");
    }

    eMap.put(Environment.CLASSPATH.name(), classpath.toString());
    MRApps.setClasspath(eMap, yconf);

    LOG.debug("Constructed environment classpath: " + classpath.toString());

    return eMap;
}

---

From source file:org.apache.tajo.yarn.command.LaunchCommand.java

License:Apache License

private void setupEnv(ContainerLaunchContext amContainer) throws IOException {
    LOG.info("Set the environment for the application master");
    Map<String, String> env = new HashMap<String, String>();

    // 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(File.pathSeparatorChar)
            .append("./*");
    for (String c : conf.getStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH,
            YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH)) {
        classPathEnv.append(File.pathSeparatorChar);
        classPathEnv.append(c.trim());//from w w  w.  ja v  a2s .c om
    }

    classPathEnv.append(File.pathSeparatorChar).append("./").append(libDir).append("/*");

    classPathEnv.append(File.pathSeparatorChar).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());
    env.put(Constants.TAJO_ARCHIVE_PATH, tajoArchive);
    env.put(Constants.TAJO_ARCHIVE_ROOT, "tajo/" + getTajoRootInArchive(tajoArchive));
    env.put(Constants.TAJO_HOME, "$PWD/${" + Constants.TAJO_ARCHIVE_ROOT + "}");
    env.put(Constants.TAJO_CONF_DIR, "$PWD/conf");
    env.put(Constants.TAJO_LOG_DIR, ApplicationConstants.LOG_DIR_EXPANSION_VAR);
    env.put(Constants.TAJO_CLASSPATH, "/export/apps/hadoop/site/lib/*:$PWD/" + libDir + "/*");
    amContainer.setEnvironment(env);
}

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From source file:org.apache.tez.common.TezYARNUtils.java

License:Apache License

public static String getFrameworkClasspath(Configuration conf, boolean usingArchive) {
    StringBuilder classpathBuilder = new StringBuilder();

    // Add any additional user-specified classpath
    String additionalClasspath = conf.get(TezConfiguration.TEZ_CLUSTER_ADDITIONAL_CLASSPATH_PREFIX);
    if (additionalClasspath != null && !additionalClasspath.trim().isEmpty()) {
        classpathBuilder.append(additionalClasspath).append(File.pathSeparator);
    }//from  www. jav  a  2 s .c  o  m

    // Add PWD:PWD/*
    classpathBuilder.append(Environment.PWD.$()).append(File.pathSeparator)
            .append(Environment.PWD.$() + File.separator + "*").append(File.pathSeparator);

    // Next add the tez libs, if specified via an archive.
    if (usingArchive) {
        // Add PWD/tezlib/*
        classpathBuilder.append(Environment.PWD.$()).append(File.separator).append(TezConstants.TEZ_TAR_LR_NAME)
                .append(File.separator).append("*").append(File.pathSeparator);

        // Add PWD/tezlib/lib/*
        classpathBuilder.append(Environment.PWD.$()).append(File.separator).append(TezConstants.TEZ_TAR_LR_NAME)
                .append(File.separator).append("lib").append(File.separator).append("*")
                .append(File.pathSeparator);
    }

    // Last add HADOOP_CLASSPATH, if it's required.
    if (conf.getBoolean(TezConfiguration.TEZ_USE_CLUSTER_HADOOP_LIBS,
            TezConfiguration.TEZ_USE_CLUSTER_HADOOP_LIBS_DEFAULT)) {
        for (String c : conf.getStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH,
                YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH)) {
            classpathBuilder.append(c.trim()).append(File.pathSeparator);
        }
    } else {
        // Setup HADOOP_CONF_DIR after PWD and tez-libs, if it's required.
        classpathBuilder.append(Environment.HADOOP_CONF_DIR.$()).append(File.pathSeparator);
    }

    String classpath = classpathBuilder.toString();
    return StringInterner.weakIntern(classpath);
}

---

From source file:org.apache.tez.test.MiniTezCluster.java

License:Apache License

@Override
public void serviceStart() throws Exception {
    LOG.info("Starting MiniTezCluster");
    super.serviceStart();
    File workDir = super.getTestWorkDir();
    Configuration conf = super.getConfig();

    confFilePath = new Path(workDir.getAbsolutePath(), YARN_CLUSTER_CONFIG);
    File confFile = new File(confFilePath.toString());
    try {//from  w  ww .  j av  a2  s. c o  m
        confFile.createNewFile();
        conf.writeXml(new FileOutputStream(confFile));
        confFile.deleteOnExit();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        throw new RuntimeException(e);
    }
    confFilePath = new Path(confFile.getAbsolutePath());
    conf.setStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH, workDir.getAbsolutePath(),
            System.getProperty("java.class.path"));
    LOG.info("Setting yarn-site.xml via YARN-APP-CP at: "
            + conf.get(YarnConfiguration.YARN_APPLICATION_CLASSPATH));
}

---

From source file:org.apache.tez.tests.MiniTezClusterWithTimeline.java

License:Apache License

@Override
public void serviceStart() throws Exception {
    LOG.info("Starting MiniTezClusterWithTimeline");
    super.serviceStart();
    File workDir = super.getTestWorkDir();
    Configuration conf = super.getConfig();

    confFilePath = new Path(workDir.getAbsolutePath(), YARN_CLUSTER_CONFIG);
    File confFile = new File(confFilePath.toString());
    try {/*  w ww.  ja  va2  s.co  m*/
        confFile.createNewFile();
        conf.writeXml(new FileOutputStream(confFile));
        confFile.deleteOnExit();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        throw new RuntimeException(e);
    }
    confFilePath = new Path(confFile.getAbsolutePath());
    conf.setStrings(YarnConfiguration.YARN_APPLICATION_CLASSPATH, workDir.getAbsolutePath(),
            System.getProperty("java.class.path"));
    LOG.info("Setting yarn-site.xml via YARN-APP-CP at: "
            + conf.get(YarnConfiguration.YARN_APPLICATION_CLASSPATH));
}

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From source file:org.apache.twill.example.yarn.HelloWorld.java

License:Apache License

public static void main(String[] args) {
    if (args.length < 1) {
        System.err.println("Arguments format: <host:port of zookeeper server>");
        System.exit(1);/*  w ww  .  j  ava 2 s . c o  m*/
    }

    String zkStr = args[0];
    YarnConfiguration yarnConfiguration = new YarnConfiguration();
    final TwillRunnerService twillRunner = new YarnTwillRunnerService(yarnConfiguration, zkStr);
    twillRunner.start();

    String yarnClasspath = yarnConfiguration.get(YarnConfiguration.YARN_APPLICATION_CLASSPATH,
            Joiner.on(",").join(YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH));
    List<String> applicationClassPaths = Lists.newArrayList();
    Iterables.addAll(applicationClassPaths, Splitter.on(",").split(yarnClasspath));
    final TwillController controller = twillRunner.prepare(new HelloWorldRunnable())
            .addLogHandler(new PrinterLogHandler(new PrintWriter(System.out, true)))
            .withApplicationClassPaths(applicationClassPaths)
            .withBundlerClassAcceptor(new HadoopClassExcluder()).start();

    Runtime.getRuntime().addShutdownHook(new Thread() {
        @Override
        public void run() {
            try {
                Futures.getUnchecked(controller.terminate());
            } finally {
                twillRunner.stop();
            }
        }
    });

    try {
        controller.awaitTerminated();
    } catch (ExecutionException e) {
        e.printStackTrace();
    }
}

---

From source file:org.conan.myhadoop02.mr.yarntest.Client.java

License:Apache License

/**
 * Main run function for the client/*w w  w. java  2s . c om*/
 * @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
    int maxMem = appResponse.getMaximumResourceCapability().getMemory();
    LOG.info("Max mem capabililty 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 capabililty 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 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.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);

    // Service data is a binary blob that can be passed to the application
    // Not needed in this scenario
    // amContainer.setServiceData(serviceData);

    // Setup security tokens
    if (UserGroupInformation.isSecurityEnabled()) {
        // Note: Credentials class is marked as LimitedPrivate for HDFS and MapReduce
        Credentials credentials = new Credentials();
        String tokenRenewer = conf.get(YarnConfiguration.RM_PRINCIPAL);
        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);

    // TODO
    // Try submitting the same request again
    // app submission failure?

    // Monitor the application
    return monitorApplication(appId);

}

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