private ContainerLaunchContext newContainerLaunchContext(
Container container, String helixInstanceName) throws IOException {
Path appWorkDir =
GobblinClusterUtils.getAppWorkDirPath(this.fs, this.applicationName, this.applicationId);
Path containerWorkDir =
new Path(appWorkDir, GobblinYarnConfigurationKeys.CONTAINER_WORK_DIR_NAME);
Map<String, LocalResource> resourceMap = Maps.newHashMap();
addContainerLocalResources(
new Path(appWorkDir, GobblinYarnConfigurationKeys.LIB_JARS_DIR_NAME), resourceMap);
addContainerLocalResources(
new Path(containerWorkDir, GobblinYarnConfigurationKeys.APP_JARS_DIR_NAME), resourceMap);
addContainerLocalResources(
new Path(containerWorkDir, GobblinYarnConfigurationKeys.APP_FILES_DIR_NAME), resourceMap);
if (this.config.hasPath(GobblinYarnConfigurationKeys.CONTAINER_FILES_REMOTE_KEY)) {
addRemoteAppFiles(
this.config.getString(GobblinYarnConfigurationKeys.CONTAINER_FILES_REMOTE_KEY),
resourceMap);
}
ContainerLaunchContext containerLaunchContext = Records.newRecord(ContainerLaunchContext.class);
containerLaunchContext.setLocalResources(resourceMap);
containerLaunchContext.setEnvironment(
YarnHelixUtils.getEnvironmentVariables(this.yarnConfiguration));
containerLaunchContext.setCommands(
Lists.newArrayList(buildContainerCommand(container, helixInstanceName)));
if (UserGroupInformation.isSecurityEnabled()) {
containerLaunchContext.setTokens(this.tokens.duplicate());
}
return containerLaunchContext;
}
private void addTimelineDelegationToken(ContainerLaunchContext clc)
throws YarnException, IOException {
Credentials credentials = new Credentials();
DataInputByteBuffer dibb = new DataInputByteBuffer();
ByteBuffer tokens = clc.getTokens();
if (tokens != null) {
dibb.reset(tokens);
credentials.readTokenStorageStream(dibb);
tokens.rewind();
}
// If the timeline delegation token is already in the CLC, no need to add
// one more
for (org.apache.hadoop.security.token.Token<? extends TokenIdentifier> token :
credentials.getAllTokens()) {
if (token.getKind().equals(TimelineDelegationTokenIdentifier.KIND_NAME)) {
return;
}
}
org.apache.hadoop.security.token.Token<TimelineDelegationTokenIdentifier>
timelineDelegationToken = getTimelineDelegationToken();
if (timelineDelegationToken == null) {
return;
}
credentials.addToken(timelineService, timelineDelegationToken);
if (LOG.isDebugEnabled()) {
LOG.debug("Add timline delegation token into credentials: " + timelineDelegationToken);
}
DataOutputBuffer dob = new DataOutputBuffer();
credentials.writeTokenStorageToStream(dob);
tokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
clc.setTokens(tokens);
}
public static void setTokensFor(
ContainerLaunchContext amContainer, List<Path> paths, Configuration conf) throws IOException {
Credentials credentials = new Credentials();
// for HDFS
TokenCache.obtainTokensForNamenodes(credentials, paths.toArray(new Path[0]), conf);
// for HBase
obtainTokenForHBase(credentials, conf);
// for user
UserGroupInformation currUsr = UserGroupInformation.getCurrentUser();
Collection<Token<? extends TokenIdentifier>> usrTok = currUsr.getTokens();
for (Token<? extends TokenIdentifier> token : usrTok) {
final Text id = new Text(token.getIdentifier());
LOG.info("Adding user token " + id + " with " + token);
credentials.addToken(id, token);
}
try (DataOutputBuffer dob = new DataOutputBuffer()) {
credentials.writeTokenStorageToStream(dob);
if (LOG.isDebugEnabled()) {
LOG.debug("Wrote tokens. Credentials buffer length: " + dob.getLength());
}
ByteBuffer securityTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
amContainer.setTokens(securityTokens);
}
}
public static ContainerLaunchContext newContainerLaunchContext(
Map<String, LocalResource> localResources,
Map<String, String> environment,
List<String> commands,
Map<String, ByteBuffer> serviceData,
ByteBuffer tokens,
Map<ApplicationAccessType, String> acls) {
ContainerLaunchContext container =
recordFactory.newRecordInstance(ContainerLaunchContext.class);
container.setLocalResources(localResources);
container.setEnvironment(environment);
container.setCommands(commands);
container.setServiceData(serviceData);
container.setTokens(tokens);
container.setApplicationACLs(acls);
return container;
}
/**
* Connects to CM, sets up container launch context for shell command and eventually dispatches
* the container start request to the CM.
*/
@Override
public void run() {
System.out.println(
"Setting up container launch container for containerid=" + container.getId());
ContainerLaunchContext ctx = Records.newRecord(ContainerLaunchContext.class);
// Set the environment
StringBuilder classPathEnv =
new StringBuilder(Environment.CLASSPATH.$()).append(File.pathSeparatorChar).append("./*");
for (String c :
am.getConf()
.getStrings(
YarnConfiguration.YARN_APPLICATION_CLASSPATH,
YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH)) {
classPathEnv.append(':');
classPathEnv.append(File.pathSeparatorChar);
classPathEnv.append(c.trim());
}
if (am.getConf().getBoolean(YarnConfiguration.IS_MINI_YARN_CLUSTER, false)) {
classPathEnv.append(':');
classPathEnv.append(System.getProperty("java.class.path"));
}
am.getShellEnv().put("CLASSPATH", classPathEnv.toString());
// Set the environment
ctx.setEnvironment(am.getShellEnv());
ctx.setLocalResources(task.buildScriptsAndSetResources(container));
// Set the necessary command to execute on the allocated container
Vector<CharSequence> vargs = new Vector<>(5);
vargs.add(Environment.JAVA_HOME.$() + "/bin/java");
// Set Xmx based on am memory size
vargs.add("-Xmx" + am.getContainerMemory() + "m");
// Set class name
vargs.add(HiWayConfiguration.HIWAY_WORKER_CLASS);
vargs.add("--appId " + am.getAppId().toString());
vargs.add("--containerId " + container.getId().toString());
vargs.add("--workflowId " + task.getWorkflowId());
vargs.add("--taskId " + task.getTaskId());
vargs.add("--taskName " + task.getTaskName());
vargs.add("--langLabel " + task.getLanguageLabel());
vargs.add("--id " + task.getId());
for (Data inputData : task.getInputData()) {
vargs.add(
"--input "
+ inputData.getLocalPath()
+ ","
+ inputData.isInput()
+ ","
+ inputData.getContainerId());
}
for (Data outputData : task.getOutputData()) {
vargs.add("--output " + outputData.getLocalPath());
}
if (am.isDetermineFileSizes()) {
vargs.add("--size");
}
String invocScript = task.getInvocScript();
if (invocScript.length() > 0) {
vargs.add("--invocScript " + invocScript);
}
vargs.add(">> " + Invocation.STDOUT_FILENAME);
vargs.add("2>> " + Invocation.STDERR_FILENAME);
// Get final commmand
StringBuilder command = new StringBuilder();
for (CharSequence str : vargs) {
command.append(str).append(" ");
}
List<String> commands = new ArrayList<>();
commands.add(command.toString());
ctx.setCommands(commands);
/* Set up tokens for the container. 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(am.getAllTokens().duplicate());
containerListener.addContainer(container.getId(), container);
am.getNmClientAsync().startContainerAsync(container, ctx);
}
/**
* 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();
}
}
@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);
}