コード例 #1
0
 private void setupAppMasterJar(Path jarPath, LocalResource appMasterJar) throws IOException {
   FileStatus jarStat = FileSystem.get(conf).getFileStatus(jarPath);
   appMasterJar.setResource(ConverterUtils.getYarnUrlFromPath(jarPath));
   appMasterJar.setSize(jarStat.getLen());
   appMasterJar.setTimestamp(jarStat.getModificationTime());
   appMasterJar.setType(LocalResourceType.FILE);
   appMasterJar.setVisibility(LocalResourceVisibility.PUBLIC);
 }
コード例 #2
0
ファイル: Utils.java プロジェクト: JananiC/stratosphere
 public static void registerLocalResource(
     FileSystem fs, Path remoteRsrcPath, LocalResource localResource) throws IOException {
   FileStatus jarStat = fs.getFileStatus(remoteRsrcPath);
   localResource.setResource(ConverterUtils.getYarnUrlFromURI(remoteRsrcPath.toUri()));
   localResource.setSize(jarStat.getLen());
   localResource.setTimestamp(jarStat.getModificationTime());
   localResource.setType(LocalResourceType.FILE);
   localResource.setVisibility(LocalResourceVisibility.PUBLIC);
 }
コード例 #3
0
ファイル: Util.java プロジェクト: roshanp/storm-yarn
 static LocalResource newYarnAppResource(
     FileSystem fs, Path path, LocalResourceType type, LocalResourceVisibility vis)
     throws IOException {
   Path qualified = fs.makeQualified(path);
   FileStatus status = fs.getFileStatus(qualified);
   LocalResource resource = Records.newRecord(LocalResource.class);
   resource.setType(type);
   resource.setVisibility(vis);
   resource.setResource(ConverterUtils.getYarnUrlFromPath(qualified));
   resource.setTimestamp(status.getModificationTime());
   resource.setSize(status.getLen());
   return resource;
 }
コード例 #4
0
ファイル: BuilderUtils.java プロジェクト: daisy8867/hadoopp
 public static LocalResource newLocalResource(
     URL url,
     LocalResourceType type,
     LocalResourceVisibility visibility,
     long size,
     long timestamp) {
   LocalResource resource = recordFactory.newRecordInstance(LocalResource.class);
   resource.setResource(url);
   resource.setType(type);
   resource.setVisibility(visibility);
   resource.setSize(size);
   resource.setTimestamp(timestamp);
   return resource;
 }
コード例 #5
0
ファイル: JobFolder.java プロジェクト: shravanmn/reef
  /** Creates a LocalResource instance for the JAR file referenced by the given Path. */
  public LocalResource getLocalResourceForPath(final Path jarPath, final LocalResourceType type)
      throws IOException {

    final FileStatus status =
        FileContext.getFileContext(fileSystem.getUri()).getFileStatus(jarPath);

    final LocalResource localResource = Records.newRecord(LocalResource.class);
    localResource.setType(type);
    localResource.setVisibility(LocalResourceVisibility.APPLICATION);
    localResource.setResource(ConverterUtils.getYarnUrlFromPath(status.getPath()));
    localResource.setTimestamp(status.getModificationTime());
    localResource.setSize(status.getLen());

    return localResource;
  }
コード例 #6
0
ファイル: IgniteYarnUtils.java プロジェクト: carpt/ignite
  /**
   * @param file Path.
   * @param fs File system.
   * @param type Local resource type.
   * @throws Exception If failed.
   */
  public static LocalResource setupFile(Path file, FileSystem fs, LocalResourceType type)
      throws Exception {
    LocalResource resource = Records.newRecord(LocalResource.class);

    file = fs.makeQualified(file);

    FileStatus stat = fs.getFileStatus(file);

    resource.setResource(ConverterUtils.getYarnUrlFromPath(file));
    resource.setSize(stat.getLen());
    resource.setTimestamp(stat.getModificationTime());
    resource.setType(type);
    resource.setVisibility(LocalResourceVisibility.APPLICATION);

    return resource;
  }
コード例 #7
0
 public static LocalResource newLocalResource(
     URL url,
     LocalResourceType type,
     LocalResourceVisibility visibility,
     long size,
     long timestamp,
     boolean shouldBeUploadedToSharedCache) {
   LocalResource resource = recordFactory.newRecordInstance(LocalResource.class);
   resource.setResource(url);
   resource.setType(type);
   resource.setVisibility(visibility);
   resource.setSize(size);
   resource.setTimestamp(timestamp);
   resource.setShouldBeUploadedToSharedCache(shouldBeUploadedToSharedCache);
   return resource;
 }
コード例 #8
0
ファイル: HoyaUtils.java プロジェクト: jackerxff/hoya
 /**
  * Create an AM resource from the
  *
  * @param hdfs HDFS or other filesystem in use
  * @param destPath dest path in filesystem
  * @param resourceType resource type
  * @return the resource set up wih application-level visibility and the timestamp & size set from
  *     the file stats.
  */
 public static LocalResource createAmResource(
     FileSystem hdfs, Path destPath, LocalResourceType resourceType) throws IOException {
   FileStatus destStatus = hdfs.getFileStatus(destPath);
   LocalResource amResource = Records.newRecord(LocalResource.class);
   amResource.setType(resourceType);
   // Set visibility of the resource
   // Setting to most private option
   amResource.setVisibility(LocalResourceVisibility.APPLICATION);
   // Set the resource to be copied over
   amResource.setResource(ConverterUtils.getYarnUrlFromPath(destPath));
   // Set timestamp and length of file so that the framework
   // can do basic sanity checks for the local resource
   // after it has been copied over to ensure it is the same
   // resource the client intended to use with the application
   amResource.setTimestamp(destStatus.getModificationTime());
   amResource.setSize(destStatus.getLen());
   return amResource;
 }
コード例 #9
0
ファイル: DagUtils.java プロジェクト: sushrutikhar/hive
  /*
   * Helper method to create a yarn local resource.
   */
  private LocalResource createLocalResource(
      FileSystem remoteFs, Path file, LocalResourceType type, LocalResourceVisibility visibility) {

    FileStatus fstat = null;
    try {
      fstat = remoteFs.getFileStatus(file);
    } catch (IOException e) {
      e.printStackTrace();
    }

    URL resourceURL = ConverterUtils.getYarnUrlFromPath(file);
    long resourceSize = fstat.getLen();
    long resourceModificationTime = fstat.getModificationTime();
    LOG.info("Resource modification time: " + resourceModificationTime);

    LocalResource lr = Records.newRecord(LocalResource.class);
    lr.setResource(resourceURL);
    lr.setType(type);
    lr.setSize(resourceSize);
    lr.setVisibility(visibility);
    lr.setTimestamp(resourceModificationTime);

    return lr;
  }
コード例 #10
0
ファイル: StramClient.java プロジェクト: andyperlitch/Apex
  /**
   * Launch application for the dag represented by this client.
   *
   * @throws YarnException
   * @throws IOException
   */
  public void startApplication() throws YarnException, IOException {
    Class<?>[] defaultClasses;

    if (applicationType.equals(YARN_APPLICATION_TYPE)) {
      // TODO restrict the security check to only check if security is enabled for webservices.
      if (UserGroupInformation.isSecurityEnabled()) {
        defaultClasses = DATATORRENT_SECURITY_CLASSES;
      } else {
        defaultClasses = DATATORRENT_CLASSES;
      }
    } else {
      throw new IllegalStateException(applicationType + " is not a valid application type.");
    }

    LinkedHashSet<String> localJarFiles = findJars(dag, defaultClasses);

    if (resources != null) {
      localJarFiles.addAll(resources);
    }

    YarnClusterMetrics clusterMetrics = yarnClient.getYarnClusterMetrics();
    LOG.info(
        "Got Cluster metric info from ASM"
            + ", numNodeManagers="
            + clusterMetrics.getNumNodeManagers());

    // GetClusterNodesRequest clusterNodesReq = Records.newRecord(GetClusterNodesRequest.class);
    // GetClusterNodesResponse clusterNodesResp =
    // rmClient.clientRM.getClusterNodes(clusterNodesReq);
    // LOG.info("Got Cluster node info from ASM");
    // for (NodeReport node : clusterNodesResp.getNodeReports()) {
    //  LOG.info("Got node report from ASM for"
    //           + ", nodeId=" + node.getNodeId()
    //           + ", nodeAddress" + node.getHttpAddress()
    //           + ", nodeRackName" + node.getRackName()
    //           + ", nodeNumContainers" + node.getNumContainers()
    //           + ", nodeHealthStatus" + node.getHealthReport());
    // }
    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());
      }
    }

    // Get a new application id
    YarnClientApplication newApp = yarnClient.createApplication();
    appId = newApp.getNewApplicationResponse().getApplicationId();

    // Dump out information about cluster capability as seen by the resource manager
    int maxMem = newApp.getNewApplicationResponse().getMaximumResourceCapability().getMemory();
    LOG.info("Max mem capabililty of resources in this cluster " + maxMem);
    int amMemory = dag.getMasterMemoryMB();
    if (amMemory > maxMem) {
      LOG.info(
          "AM memory specified above max threshold of cluster. Using max value."
              + ", specified="
              + amMemory
              + ", max="
              + maxMem);
      amMemory = maxMem;
    }

    if (dag.getAttributes().get(LogicalPlan.APPLICATION_ID) == null) {
      dag.setAttribute(LogicalPlan.APPLICATION_ID, appId.toString());
    }

    // Create launch context for app master
    LOG.info("Setting up application submission context for ASM");
    ApplicationSubmissionContext appContext = Records.newRecord(ApplicationSubmissionContext.class);

    // set the application id
    appContext.setApplicationId(appId);
    // set the application name
    appContext.setApplicationName(dag.getValue(LogicalPlan.APPLICATION_NAME));
    appContext.setApplicationType(this.applicationType);
    if (YARN_APPLICATION_TYPE.equals(this.applicationType)) {
      // appContext.setMaxAppAttempts(1); // no retries until Stram is HA
    }

    // Set up the container launch context for the application master
    ContainerLaunchContext amContainer = Records.newRecord(ContainerLaunchContext.class);

    // Setup security tokens
    // If security is enabled get ResourceManager and NameNode delegation tokens.
    // Set these tokens on the container so that they are sent as part of application submission.
    // This also sets them up for renewal by ResourceManager. The NameNode delegation rmToken
    // is also used by ResourceManager to fetch the jars from HDFS and set them up for the
    // application master launch.
    if (UserGroupInformation.isSecurityEnabled()) {
      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.
      FileSystem fs = StramClientUtils.newFileSystemInstance(conf);
      try {
        final Token<?> tokens[] = fs.addDelegationTokens(tokenRenewer, credentials);
        if (tokens != null) {
          for (Token<?> token : tokens) {
            LOG.info("Got dt for " + fs.getUri() + "; " + token);
          }
        }
      } finally {
        fs.close();
      }

      addRMDelegationToken(tokenRenewer, credentials);

      DataOutputBuffer dob = new DataOutputBuffer();
      credentials.writeTokenStorageToStream(dob);
      ByteBuffer fsTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
      amContainer.setTokens(fsTokens);
    }

    // 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>();

    // copy required jar files to dfs, to be localized for containers
    FileSystem fs = StramClientUtils.newFileSystemInstance(conf);
    try {
      Path appsBasePath =
          new Path(StramClientUtils.getDTDFSRootDir(fs, conf), StramClientUtils.SUBDIR_APPS);
      Path appPath = new Path(appsBasePath, appId.toString());

      String libJarsCsv = copyFromLocal(fs, appPath, localJarFiles.toArray(new String[] {}));

      LOG.info("libjars: {}", libJarsCsv);
      dag.getAttributes().put(LogicalPlan.LIBRARY_JARS, libJarsCsv);
      LaunchContainerRunnable.addFilesToLocalResources(
          LocalResourceType.FILE, libJarsCsv, localResources, fs);

      if (archives != null) {
        String[] localFiles = archives.split(",");
        String archivesCsv = copyFromLocal(fs, appPath, localFiles);
        LOG.info("archives: {}", archivesCsv);
        dag.getAttributes().put(LogicalPlan.ARCHIVES, archivesCsv);
        LaunchContainerRunnable.addFilesToLocalResources(
            LocalResourceType.ARCHIVE, archivesCsv, localResources, fs);
      }

      if (files != null) {
        String[] localFiles = files.split(",");
        String filesCsv = copyFromLocal(fs, appPath, localFiles);
        LOG.info("files: {}", filesCsv);
        dag.getAttributes().put(LogicalPlan.FILES, filesCsv);
        LaunchContainerRunnable.addFilesToLocalResources(
            LocalResourceType.FILE, filesCsv, localResources, fs);
      }

      dag.getAttributes().put(LogicalPlan.APPLICATION_PATH, appPath.toString());
      if (dag.getAttributes().get(OperatorContext.STORAGE_AGENT) == null) {
          /* which would be the most likely case */
        Path checkpointPath = new Path(appPath, LogicalPlan.SUBDIR_CHECKPOINTS);
        // use conf client side to pickup any proxy settings from dt-site.xml
        dag.setAttribute(
            OperatorContext.STORAGE_AGENT, new FSStorageAgent(checkpointPath.toString(), conf));
      }
      if (dag.getAttributes().get(LogicalPlan.CONTAINER_OPTS_CONFIGURATOR) == null) {
        dag.setAttribute(
            LogicalPlan.CONTAINER_OPTS_CONFIGURATOR, new BasicContainerOptConfigurator());
      }

      // Set the log4j properties if needed
      if (!log4jPropFile.isEmpty()) {
        Path log4jSrc = new Path(log4jPropFile);
        Path log4jDst = new Path(appPath, "log4j.props");
        fs.copyFromLocalFile(false, true, log4jSrc, log4jDst);
        FileStatus log4jFileStatus = fs.getFileStatus(log4jDst);
        LocalResource log4jRsrc = Records.newRecord(LocalResource.class);
        log4jRsrc.setType(LocalResourceType.FILE);
        log4jRsrc.setVisibility(LocalResourceVisibility.APPLICATION);
        log4jRsrc.setResource(ConverterUtils.getYarnUrlFromURI(log4jDst.toUri()));
        log4jRsrc.setTimestamp(log4jFileStatus.getModificationTime());
        log4jRsrc.setSize(log4jFileStatus.getLen());
        localResources.put("log4j.properties", log4jRsrc);
      }

      if (originalAppId != null) {
        Path origAppPath = new Path(appsBasePath, this.originalAppId);
        LOG.info("Restart from {}", origAppPath);
        copyInitialState(origAppPath);
      }

      // push logical plan to DFS location
      Path cfgDst = new Path(appPath, LogicalPlan.SER_FILE_NAME);
      FSDataOutputStream outStream = fs.create(cfgDst, true);
      LogicalPlan.write(this.dag, outStream);
      outStream.close();

      Path launchConfigDst = new Path(appPath, LogicalPlan.LAUNCH_CONFIG_FILE_NAME);
      outStream = fs.create(launchConfigDst, true);
      conf.writeXml(outStream);
      outStream.close();

      FileStatus topologyFileStatus = fs.getFileStatus(cfgDst);
      LocalResource topologyRsrc = Records.newRecord(LocalResource.class);
      topologyRsrc.setType(LocalResourceType.FILE);
      topologyRsrc.setVisibility(LocalResourceVisibility.APPLICATION);
      topologyRsrc.setResource(ConverterUtils.getYarnUrlFromURI(cfgDst.toUri()));
      topologyRsrc.setTimestamp(topologyFileStatus.getModificationTime());
      topologyRsrc.setSize(topologyFileStatus.getLen());
      localResources.put(LogicalPlan.SER_FILE_NAME, topologyRsrc);

      // Set local resource info into app master container launch context
      amContainer.setLocalResources(localResources);

      // 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>();

      // Add application jar(s) 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(s)
      // including ${CLASSPATH} will duplicate the class path in app master, removing it for now
      // StringBuilder classPathEnv = new StringBuilder("${CLASSPATH}:./*");
      StringBuilder classPathEnv = new StringBuilder("./*");
      String classpath = conf.get(YarnConfiguration.YARN_APPLICATION_CLASSPATH);
      for (String c :
          StringUtils.isBlank(classpath)
              ? YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH
              : classpath.split(",")) {
        if (c.equals("$HADOOP_CLIENT_CONF_DIR")) {
          // SPOI-2501
          continue;
        }
        classPathEnv.append(':');
        classPathEnv.append(c.trim());
      }
      env.put("CLASSPATH", classPathEnv.toString());
      // propagate to replace node managers user name (effective in non-secure mode)
      env.put("HADOOP_USER_NAME", UserGroupInformation.getLoginUser().getUserName());

      amContainer.setEnvironment(env);

      // Set the necessary command to execute the application master
      ArrayList<CharSequence> vargs = new ArrayList<CharSequence>(30);

      // Set java executable command
      LOG.info("Setting up app master command");
      vargs.add(javaCmd);
      if (dag.isDebug()) {
        vargs.add("-agentlib:jdwp=transport=dt_socket,server=y,suspend=n");
      }
      // Set Xmx based on am memory size
      // default heap size 75% of total memory
      vargs.add("-Xmx" + (amMemory * 3 / 4) + "m");
      vargs.add("-XX:+HeapDumpOnOutOfMemoryError");
      vargs.add("-XX:HeapDumpPath=/tmp/dt-heap-" + appId.getId() + ".bin");
      vargs.add("-Dhadoop.root.logger=" + (dag.isDebug() ? "DEBUG" : "INFO") + ",RFA");
      vargs.add("-Dhadoop.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR);
      vargs.add(String.format("-D%s=%s", StreamingContainer.PROP_APP_PATH, dag.assertAppPath()));
      if (dag.isDebug()) {
        vargs.add("-Dlog4j.debug=true");
      }

      String loggersLevel = conf.get(DTLoggerFactory.DT_LOGGERS_LEVEL);
      if (loggersLevel != null) {
        vargs.add(String.format("-D%s=%s", DTLoggerFactory.DT_LOGGERS_LEVEL, loggersLevel));
      }
      vargs.add(StreamingAppMaster.class.getName());
      vargs.add("1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/AppMaster.stdout");
      vargs.add("2>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/AppMaster.stderr");

      // Get final command
      StringBuilder command = new StringBuilder(9 * vargs.size());
      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());
      amContainer.setCommands(commands);

      // Set up resource type requirements
      // For now, only memory is supported so we set memory requirements
      Resource capability = Records.newRecord(Resource.class);
      capability.setMemory(amMemory);
      appContext.setResource(capability);

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

      // Set the priority for the application master
      Priority pri = Records.newRecord(Priority.class);
      pri.setPriority(amPriority);
      appContext.setPriority(pri);
      // Set the queue to which this application is to be submitted in the RM
      appContext.setQueue(queueName);

      // Submit the application to the applications manager
      // SubmitApplicationResponse submitResp = rmClient.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
      String specStr =
          Objects.toStringHelper("Submitting application: ")
              .add("name", appContext.getApplicationName())
              .add("queue", appContext.getQueue())
              .add("user", UserGroupInformation.getLoginUser())
              .add("resource", appContext.getResource())
              .toString();
      LOG.info(specStr);
      if (dag.isDebug()) {
        // LOG.info("Full submission context: " + appContext);
      }
      yarnClient.submitApplication(appContext);
    } finally {
      fs.close();
    }
  }
コード例 #11
0
    @Override
    /**
     * Connects to CM, sets up container launch context for shell command and eventually dispatches
     * the container start request to the CM.
     */
    public void run() {
      LOG.info("Setting up container launch container for containerid=" + container.getId());
      ContainerLaunchContext ctx = Records.newRecord(ContainerLaunchContext.class);

      // Set the environment
      ctx.setEnvironment(shellEnv);

      // Set the local resources
      Map<String, LocalResource> localResources = new HashMap<String, LocalResource>();

      // The container for the eventual shell commands needs its own local
      // resources too.
      // In this scenario, if a shell script is specified, we need to have it
      // copied and made available to the container.
      if (!scriptPath.isEmpty()) {
        Path renamedScriptPath = null;
        if (Shell.WINDOWS) {
          renamedScriptPath = new Path(scriptPath + ".bat");
        } else {
          renamedScriptPath = new Path(scriptPath + ".sh");
        }

        try {
          // rename the script file based on the underlying OS syntax.
          renameScriptFile(renamedScriptPath);
        } catch (Exception e) {
          LOG.error("Not able to add suffix (.bat/.sh) to the shell script filename", e);
          // We know we cannot continue launching the container
          // so we should release it.
          numCompletedContainers.incrementAndGet();
          numFailedContainers.incrementAndGet();
          return;
        }

        LocalResource shellRsrc = Records.newRecord(LocalResource.class);
        shellRsrc.setType(LocalResourceType.FILE);
        shellRsrc.setVisibility(LocalResourceVisibility.APPLICATION);
        try {
          shellRsrc.setResource(
              ConverterUtils.getYarnUrlFromURI(new URI(renamedScriptPath.toString())));
        } catch (URISyntaxException e) {
          LOG.error(
              "Error when trying to use shell script path specified"
                  + " in env, path="
                  + renamedScriptPath,
              e);

          // A failure scenario on bad input such as invalid shell script path
          // We know we cannot continue launching the container
          // so we should release it.
          // TODO
          numCompletedContainers.incrementAndGet();
          numFailedContainers.incrementAndGet();
          return;
        }
        shellRsrc.setTimestamp(shellScriptPathTimestamp);
        shellRsrc.setSize(shellScriptPathLen);
        localResources.put(
            Shell.WINDOWS ? ExecBatScripStringtPath : ExecShellStringPath, shellRsrc);
        shellCommand = Shell.WINDOWS ? windows_command : linux_bash_command;
      }
      ctx.setLocalResources(localResources);

      // Set the necessary command to execute on the allocated container
      Vector<CharSequence> vargs = new Vector<CharSequence>(5);

      // Set executable command
      vargs.add(shellCommand);
      // Set shell script path
      if (!scriptPath.isEmpty()) {
        vargs.add(Shell.WINDOWS ? ExecBatScripStringtPath : ExecShellStringPath);
      }

      // Set args for the shell command if any
      vargs.add(shellArgs);
      // Add log redirect params
      vargs.add("1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/stdout");
      vargs.add("2>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/stderr");

      // Get final commmand
      StringBuilder command = new StringBuilder();
      for (CharSequence str : vargs) {
        command.append(str).append(" ");
      }

      List<String> commands = new ArrayList<String>();
      commands.add(command.toString());
      ctx.setCommands(commands);

      // Set up tokens for the container too. Today, for normal shell commands,
      // the container in distribute-shell doesn't need any tokens. We are
      // populating them mainly for NodeManagers to be able to download any
      // files in the distributed file-system. The tokens are otherwise also
      // useful in cases, for e.g., when one is running a "hadoop dfs" command
      // inside the distributed shell.
      ctx.setTokens(allTokens.duplicate());

      containerListener.addContainer(container.getId(), container);
      nmClientAsync.startContainerAsync(container, ctx);
    }