Example usage for org.apache.hadoop.yarn.api.protocolrecords StartContainerRequest setContainerLaunchContext

Introduction

In this page you can find the example usage for org.apache.hadoop.yarn.api.protocolrecords StartContainerRequest setContainerLaunchContext.

Prototype

@Public
@Stable
public abstract void setContainerLaunchContext(ContainerLaunchContext context);

Source Link

Document

Set the ContainerLaunchContext for the container to be started by the NodeManager

Usage

From source file:com.continuuity.weave.internal.yarn.Hadoop20YarnNMClient.java

License:Apache License

@Override
public Cancellable start(YarnContainerInfo containerInfo, YarnLaunchContext launchContext) {
    ContainerLaunchContext context = launchContext.getLaunchContext();
    context.setUser(System.getProperty("user.name"));

    Container container = containerInfo.getContainer();

    context.setContainerId(container.getId());
    context.setResource(container.getResource());

    StartContainerRequest startRequest = Records.newRecord(StartContainerRequest.class);
    startRequest.setContainerLaunchContext(context);

    ContainerManager manager = connectContainerManager(container);
    try {/*from   w ww.  j a va  2 s.  com*/
        manager.startContainer(startRequest);
        return new ContainerTerminator(container, manager);
    } catch (YarnRemoteException e) {
        LOG.error("Error in launching process", e);
        throw Throwables.propagate(e);
    }

}

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From source file:org.apache.hama.bsp.BSPTaskLauncher.java

License:Apache License

private GetContainerStatusesRequest setupContainer(Container allocatedContainer, ContainerManagementProtocol cm,
        String user, int id) throws IOException, YarnException {
    LOG.info("Setting up a container for user " + user + " with id of " + id + " and containerID of "
            + allocatedContainer.getId() + " as " + user);
    // Now we setup a ContainerLaunchContext
    ContainerLaunchContext ctx = Records.newRecord(ContainerLaunchContext.class);

    // Set the local resources
    Map<String, LocalResource> localResources = new HashMap<String, LocalResource>();
    LocalResource packageResource = Records.newRecord(LocalResource.class);
    FileSystem fs = FileSystem.get(conf);
    Path packageFile = new Path(System.getenv(YARNBSPConstants.HAMA_YARN_LOCATION));
    URL packageUrl = ConverterUtils
            .getYarnUrlFromPath(packageFile.makeQualified(fs.getUri(), fs.getWorkingDirectory()));
    LOG.info("PackageURL has been composed to " + packageUrl.toString());
    try {// ww w .j  a v  a2 s .co m
        LOG.info("Reverting packageURL to path: " + ConverterUtils.getPathFromYarnURL(packageUrl));
    } catch (URISyntaxException e) {
        LOG.fatal("If you see this error the workarround does not work", e);
    }

    packageResource.setResource(packageUrl);
    packageResource.setSize(Long.parseLong(System.getenv(YARNBSPConstants.HAMA_YARN_SIZE)));
    packageResource.setTimestamp(Long.parseLong(System.getenv(YARNBSPConstants.HAMA_YARN_TIMESTAMP)));
    packageResource.setType(LocalResourceType.FILE);
    packageResource.setVisibility(LocalResourceVisibility.APPLICATION);

    localResources.put(YARNBSPConstants.APP_MASTER_JAR_PATH, packageResource);

    Path hamaReleaseFile = new Path(System.getenv(YARNBSPConstants.HAMA_RELEASE_LOCATION));
    URL hamaReleaseUrl = ConverterUtils
            .getYarnUrlFromPath(hamaReleaseFile.makeQualified(fs.getUri(), fs.getWorkingDirectory()));
    LOG.info("Hama release URL has been composed to " + hamaReleaseUrl.toString());

    LocalResource hamaReleaseRsrc = Records.newRecord(LocalResource.class);
    hamaReleaseRsrc.setResource(hamaReleaseUrl);
    hamaReleaseRsrc.setSize(Long.parseLong(System.getenv(YARNBSPConstants.HAMA_RELEASE_SIZE)));
    hamaReleaseRsrc.setTimestamp(Long.parseLong(System.getenv(YARNBSPConstants.HAMA_RELEASE_TIMESTAMP)));
    hamaReleaseRsrc.setType(LocalResourceType.ARCHIVE);
    hamaReleaseRsrc.setVisibility(LocalResourceVisibility.APPLICATION);

    localResources.put(YARNBSPConstants.HAMA_SYMLINK, hamaReleaseRsrc);

    ctx.setLocalResources(localResources);

    /*
     * TODO Package classpath seems not to work if you're in pseudo distributed
     * mode, because the resource must not be moved, it will never be unpacked.
     * So we will check if our jar file has the file:// prefix and put it into
     * the CP directly
     */

    StringBuilder classPathEnv = new StringBuilder(ApplicationConstants.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());
    }

    classPathEnv.append(File.pathSeparator);
    classPathEnv
            .append("./" + YARNBSPConstants.HAMA_SYMLINK + "/" + YARNBSPConstants.HAMA_RELEASE_VERSION + "/*");
    classPathEnv.append(File.pathSeparator);
    classPathEnv.append(
            "./" + YARNBSPConstants.HAMA_SYMLINK + "/" + YARNBSPConstants.HAMA_RELEASE_VERSION + "/lib/*");

    Vector<CharSequence> vargs = new Vector<CharSequence>();
    vargs.add("${JAVA_HOME}/bin/java");
    vargs.add("-cp " + classPathEnv + "");
    vargs.add(BSPRunner.class.getCanonicalName());

    vargs.add(jobId.getJtIdentifier());
    vargs.add(Integer.toString(id));
    vargs.add(this.jobFile.makeQualified(fs.getUri(), fs.getWorkingDirectory()).toString());

    vargs.add("1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/bsp.stdout");
    vargs.add("2>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/bsp.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);
    LOG.info("Starting command: " + commands);

    StartContainerRequest startReq = Records.newRecord(StartContainerRequest.class);
    startReq.setContainerLaunchContext(ctx);
    startReq.setContainerToken(allocatedContainer.getContainerToken());

    List<StartContainerRequest> list = new ArrayList<StartContainerRequest>();
    list.add(startReq);
    StartContainersRequest requestList = StartContainersRequest.newInstance(list);
    cm.startContainers(requestList);

    GetContainerStatusesRequest statusReq = Records.newRecord(GetContainerStatusesRequest.class);
    List<ContainerId> containerIds = new ArrayList<ContainerId>();
    containerIds.add(allocatedContainer.getId());
    statusReq.setContainerIds(containerIds);
    return statusReq;
}

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From source file:org.apache.samza.job.yarn.ContainerUtil.java

License:Apache License

protected void startContainer(Path packagePath, Container container, Map<String, String> env,
        final String cmd) {
    log.info("starting container {} {} {} {}", new Object[] { packagePath, container, env, cmd });

    // set the local package so that the containers and app master are provisioned with it
    LocalResource packageResource = Records.newRecord(LocalResource.class);
    URL packageUrl = ConverterUtils.getYarnUrlFromPath(packagePath);
    FileStatus fileStatus;//w  w  w  .  j  a va2  s.  com
    try {
        fileStatus = packagePath.getFileSystem(yarnConfiguration).getFileStatus(packagePath);
    } catch (IOException ioe) {
        log.error("IO Exception when accessing the package status from the filesystem", ioe);
        throw new SamzaException("IO Exception when accessing the package status from the filesystem");
    }

    packageResource.setResource(packageUrl);
    packageResource.setSize(fileStatus.getLen());
    packageResource.setTimestamp(fileStatus.getModificationTime());
    packageResource.setType(LocalResourceType.ARCHIVE);
    packageResource.setVisibility(LocalResourceVisibility.APPLICATION);

    ByteBuffer allTokens;
    // copy tokens (copied from dist shell example)
    try {
        Credentials credentials = UserGroupInformation.getCurrentUser().getCredentials();
        DataOutputBuffer dob = new DataOutputBuffer();
        credentials.writeTokenStorageToStream(dob);

        // now remove the AM->RM token so that containers cannot access it
        Iterator iter = credentials.getAllTokens().iterator();
        while (iter.hasNext()) {
            TokenIdentifier token = ((Token) iter.next()).decodeIdentifier();
            if (token.getKind().equals(AMRMTokenIdentifier.KIND_NAME)) {
                iter.remove();
            }
        }
        allTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());

    } catch (IOException ioe) {
        ioe.printStackTrace();
        throw new SamzaException("IO Exception when writing credentials to output buffer");
    }

    ContainerLaunchContext context = Records.newRecord(ContainerLaunchContext.class);
    context.setEnvironment(env);
    context.setTokens(allTokens.duplicate());
    context.setCommands(new ArrayList<String>() {
        {
            add(cmd);
        }
    });
    context.setLocalResources(Collections.singletonMap("__package", packageResource));

    log.debug("setting package to {}", packageResource);
    log.debug("setting context to {}", context);

    StartContainerRequest startContainerRequest = Records.newRecord(StartContainerRequest.class);
    startContainerRequest.setContainerLaunchContext(context);
    try {
        nmClient.startContainer(container, context);
    } catch (YarnException ye) {
        log.error("Received YarnException when starting container: " + container.getId(), ye);
        throw new SamzaException("Received YarnException when starting container: " + container.getId());
    } catch (IOException ioe) {
        log.error("Received IOException when starting container: " + container.getId(), ioe);
        throw new SamzaException("Received IOException when starting container: " + container.getId());
    }
}

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From source file:org.apache.samza.job.yarn.refactor.YarnContainerRunner.java

License:Apache License

/**
 *    Runs a command as a process on the container. All binaries needed by the physical process are packaged in the URL
 *    specified by packagePath./*from  w  w  w .j  av  a 2  s  .c  om*/
 */
private void startContainer(Path packagePath, Container container, Map<String, String> env, final String cmd)
        throws SamzaContainerLaunchException {
    log.info("starting container {} {} {} {}", new Object[] { packagePath, container, env, cmd });

    // set the local package so that the containers and app master are provisioned with it
    LocalResource packageResource = Records.newRecord(LocalResource.class);
    URL packageUrl = ConverterUtils.getYarnUrlFromPath(packagePath);
    FileStatus fileStatus;
    try {
        fileStatus = packagePath.getFileSystem(yarnConfiguration).getFileStatus(packagePath);
    } catch (IOException ioe) {
        log.error("IO Exception when accessing the package status from the filesystem", ioe);
        throw new SamzaContainerLaunchException(
                "IO Exception when accessing the package status from the filesystem");
    }

    packageResource.setResource(packageUrl);
    packageResource.setSize(fileStatus.getLen());
    packageResource.setTimestamp(fileStatus.getModificationTime());
    packageResource.setType(LocalResourceType.ARCHIVE);
    packageResource.setVisibility(LocalResourceVisibility.APPLICATION);

    ByteBuffer allTokens;
    // copy tokens (copied from dist shell example)
    try {
        Credentials credentials = UserGroupInformation.getCurrentUser().getCredentials();
        DataOutputBuffer dob = new DataOutputBuffer();
        credentials.writeTokenStorageToStream(dob);

        // now remove the AM->RM token so that containers cannot access it
        Iterator iter = credentials.getAllTokens().iterator();
        while (iter.hasNext()) {
            TokenIdentifier token = ((Token) iter.next()).decodeIdentifier();
            if (token.getKind().equals(AMRMTokenIdentifier.KIND_NAME)) {
                iter.remove();
            }
        }
        allTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());

    } catch (IOException ioe) {
        log.error("IOException when writing credentials.", ioe);
        throw new SamzaContainerLaunchException("IO Exception when writing credentials to output buffer");
    }

    ContainerLaunchContext context = Records.newRecord(ContainerLaunchContext.class);
    context.setEnvironment(env);
    context.setTokens(allTokens.duplicate());
    context.setCommands(new ArrayList<String>() {
        {
            add(cmd);
        }
    });
    context.setLocalResources(Collections.singletonMap("__package", packageResource));

    log.debug("setting package to {}", packageResource);
    log.debug("setting context to {}", context);

    StartContainerRequest startContainerRequest = Records.newRecord(StartContainerRequest.class);
    startContainerRequest.setContainerLaunchContext(context);
    try {
        nmClient.startContainer(container, context);
    } catch (YarnException ye) {
        log.error("Received YarnException when starting container: " + container.getId(), ye);
        throw new SamzaContainerLaunchException(
                "Received YarnException when starting container: " + container.getId(), ye);
    } catch (IOException ioe) {
        log.error("Received IOException when starting container: " + container.getId(), ioe);
        throw new SamzaContainerLaunchException(
                "Received IOException when starting container: " + container.getId(), ioe);
    }
}

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From source file:org.apache.samza.job.yarn.YarnClusterResourceManager.java

License:Apache License

/**
 * Runs a command as a process on the container. All binaries needed by the physical process are packaged in the URL
 * specified by packagePath./* ww  w . j  ava 2  s .  co m*/
 */
private void startContainer(Path packagePath, Container container, Map<String, String> env, final String cmd)
        throws IOException {
    LocalResource packageResource = Records.newRecord(LocalResource.class);
    URL packageUrl = ConverterUtils.getYarnUrlFromPath(packagePath);
    FileStatus fileStatus;
    fileStatus = packagePath.getFileSystem(yarnConfiguration).getFileStatus(packagePath);
    packageResource.setResource(packageUrl);
    log.debug("Set package resource in YarnContainerRunner for {}", packageUrl);
    packageResource.setSize(fileStatus.getLen());
    packageResource.setTimestamp(fileStatus.getModificationTime());
    packageResource.setType(LocalResourceType.ARCHIVE);
    packageResource.setVisibility(LocalResourceVisibility.APPLICATION);

    ByteBuffer allTokens;
    // copy tokens to start the container
    Credentials credentials = UserGroupInformation.getCurrentUser().getCredentials();
    DataOutputBuffer dob = new DataOutputBuffer();
    credentials.writeTokenStorageToStream(dob);

    // now remove the AM->RM token so that containers cannot access it
    Iterator iter = credentials.getAllTokens().iterator();
    while (iter.hasNext()) {
        TokenIdentifier token = ((org.apache.hadoop.security.token.Token) iter.next()).decodeIdentifier();
        if (token != null && token.getKind().equals(AMRMTokenIdentifier.KIND_NAME)) {
            iter.remove();
        }
    }
    allTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());

    Map<String, LocalResource> localResourceMap = new HashMap<>();
    localResourceMap.put("__package", packageResource);

    // include the resources from the universal resource configurations
    LocalizerResourceMapper resourceMapper = new LocalizerResourceMapper(new LocalizerResourceConfig(config),
            yarnConfiguration);
    localResourceMap.putAll(resourceMapper.getResourceMap());

    ContainerLaunchContext context = Records.newRecord(ContainerLaunchContext.class);
    context.setEnvironment(env);
    context.setTokens(allTokens.duplicate());
    context.setCommands(new ArrayList<String>() {
        {
            add(cmd);
        }
    });
    context.setLocalResources(localResourceMap);

    if (UserGroupInformation.isSecurityEnabled()) {
        Map<ApplicationAccessType, String> acls = yarnConfig.getYarnApplicationAcls();
        if (!acls.isEmpty()) {
            context.setApplicationACLs(acls);
        }
    }

    log.debug("Setting localResourceMap to {}", localResourceMap);
    log.debug("Setting context to {}", context);

    StartContainerRequest startContainerRequest = Records.newRecord(StartContainerRequest.class);
    startContainerRequest.setContainerLaunchContext(context);

    log.info(
            "Making an async start request for Container ID: {} on host: {} with local resource map: {} and context: {}",
            container.getId(), container.getNodeHttpAddress(), localResourceMap.toString(), context);
    nmClientAsync.startContainerAsync(container, context);
}

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From source file:org.apache.samza.job.yarn.YarnContainerRunner.java

License:Apache License

/**
 *    Runs a command as a process on the container. All binaries needed by the physical process are packaged in the URL
 *    specified by packagePath.//  w w  w.j av  a2s. co  m
 */
private void startContainer(Path packagePath, Container container, Map<String, String> env, final String cmd)
        throws SamzaContainerLaunchException {
    log.info("starting container {} {} {} {}", new Object[] { packagePath, container, env, cmd });

    // TODO: SAMZA-1144 remove the customized approach for package resource and use the common one.
    // But keep it now for backward compatibility.
    // set the local package so that the containers and app master are provisioned with it
    LocalResource packageResource = Records.newRecord(LocalResource.class);
    URL packageUrl = ConverterUtils.getYarnUrlFromPath(packagePath);
    FileStatus fileStatus;
    try {
        fileStatus = packagePath.getFileSystem(yarnConfiguration).getFileStatus(packagePath);
    } catch (IOException ioe) {
        log.error("IO Exception when accessing the package status from the filesystem", ioe);
        throw new SamzaContainerLaunchException(
                "IO Exception when accessing the package status from the filesystem");
    }

    packageResource.setResource(packageUrl);
    log.info("set package Resource in YarnContainerRunner for {}", packageUrl);
    packageResource.setSize(fileStatus.getLen());
    packageResource.setTimestamp(fileStatus.getModificationTime());
    packageResource.setType(LocalResourceType.ARCHIVE);
    packageResource.setVisibility(LocalResourceVisibility.APPLICATION);

    ByteBuffer allTokens;
    // copy tokens (copied from dist shell example)
    try {
        Credentials credentials = UserGroupInformation.getCurrentUser().getCredentials();
        DataOutputBuffer dob = new DataOutputBuffer();
        credentials.writeTokenStorageToStream(dob);

        // now remove the AM->RM token so that containers cannot access it
        Iterator iter = credentials.getAllTokens().iterator();
        while (iter.hasNext()) {
            TokenIdentifier token = ((Token) iter.next()).decodeIdentifier();
            if (token != null && token.getKind().equals(AMRMTokenIdentifier.KIND_NAME)) {
                iter.remove();
            }
        }
        allTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());

    } catch (IOException ioe) {
        log.error("IOException when writing credentials.", ioe);
        throw new SamzaContainerLaunchException("IO Exception when writing credentials to output buffer");
    }

    Map<String, LocalResource> localResourceMap = new HashMap<>();
    localResourceMap.put("__package", packageResource);

    // include the resources from the universal resource configurations
    LocalizerResourceMapper resourceMapper = new LocalizerResourceMapper(new LocalizerResourceConfig(config),
            yarnConfiguration);
    localResourceMap.putAll(resourceMapper.getResourceMap());

    ContainerLaunchContext context = Records.newRecord(ContainerLaunchContext.class);
    context.setEnvironment(env);
    context.setTokens(allTokens.duplicate());
    context.setCommands(new ArrayList<String>() {
        {
            add(cmd);
        }
    });
    context.setLocalResources(localResourceMap);

    log.debug("setting localResourceMap to {}", localResourceMap);
    log.debug("setting context to {}", context);

    StartContainerRequest startContainerRequest = Records.newRecord(StartContainerRequest.class);
    startContainerRequest.setContainerLaunchContext(context);
    try {
        nmClient.startContainer(container, context);
    } catch (YarnException ye) {
        log.error("Received YarnException when starting container: " + container.getId(), ye);
        throw new SamzaContainerLaunchException(
                "Received YarnException when starting container: " + container.getId(), ye);
    } catch (IOException ioe) {
        log.error("Received IOException when starting container: " + container.getId(), ioe);
        throw new SamzaContainerLaunchException(
                "Received IOException when starting container: " + container.getId(), ioe);
    }
}

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From source file:org.apache.tajo.master.YarnContainerProxy.java

License:Apache License

@Override
@SuppressWarnings("unchecked")
public synchronized void launch(ContainerLaunchContext commonContainerLaunchContext) {
    LOG.info("Launching Container with Id: " + containerID);
    if (this.state == ContainerState.KILLED_BEFORE_LAUNCH) {
        state = ContainerState.DONE;//from   w ww  . j  a  v a2  s .c o  m
        LOG.error("Container (" + containerID + " was killed before it was launched");
        return;
    }

    ContainerManagementProtocol proxy = null;
    try {

        proxy = getCMProxy(containerID, containerMgrAddress, containerToken);

        // Construct the actual Container
        ContainerLaunchContext containerLaunchContext = createContainerLaunchContext(
                commonContainerLaunchContext);

        // Now launch the actual container
        List<StartContainerRequest> startRequestList = new ArrayList<StartContainerRequest>();
        StartContainerRequest startRequest = Records.newRecord(StartContainerRequest.class);
        startRequest.setContainerLaunchContext(containerLaunchContext);
        startRequestList.add(startRequest);
        StartContainersRequest startRequests = Records.newRecord(StartContainersRequest.class);
        startRequests.setStartContainerRequests(startRequestList);
        StartContainersResponse response = proxy.startContainers(startRequests);

        ByteBuffer portInfo = response.getAllServicesMetaData().get(PullServerAuxService.PULLSERVER_SERVICEID);

        if (portInfo != null) {
            port = PullServerAuxService.deserializeMetaData(portInfo);
        }

        LOG.info("PullServer port returned by ContainerManager for " + containerID + " : " + port);

        if (port < 0) {
            this.state = ContainerState.FAILED;
            throw new IllegalStateException(
                    "Invalid shuffle port number " + port + " returned for " + containerID);
        }

        this.state = ContainerState.RUNNING;
        this.hostName = containerMgrAddress.split(":")[0];
        context.getResourceAllocator().addContainer(containerID, this);
    } catch (Throwable t) {
        String message = "Container launch failed for " + containerID + " : "
                + StringUtils.stringifyException(t);
        this.state = ContainerState.FAILED;
        LOG.error(message);
    } finally {
        if (proxy != null) {
            yarnRPC.stopProxy(proxy, conf);
        }
    }
}

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From source file:org.deeplearning4j.iterativereduce.runtime.yarn.ContainerManagerHandler.java

License:Apache License

public StartContainerResponse startContainer(List<String> commands, Map<String, LocalResource> localResources,
        Map<String, String> env) throws IOException {

    if (containerManager == null)
        throw new IllegalStateException("Cannot start a continer before connecting to the container manager!");

    ContainerLaunchContext ctx = Records.newRecord(ContainerLaunchContext.class);
    ctx.setContainerId(container.getId());
    ctx.setResource(container.getResource());
    ctx.setLocalResources(localResources);
    ctx.setCommands(commands);//from  ww w .j  a va 2  s.  c  o m
    ctx.setUser(UserGroupInformation.getCurrentUser().getShortUserName());
    ctx.setEnvironment(env);

    if (LOG.isDebugEnabled()) {
        LOG.debug("Using ContainerLaunchContext with" + ", containerId=" + ctx.getContainerId() + ", memory="
                + ctx.getResource().getMemory() + ", localResources=" + ctx.getLocalResources().toString()
                + ", commands=" + ctx.getCommands().toString() + ", env=" + ctx.getEnvironment().toString());
    }

    StartContainerRequest request = Records.newRecord(StartContainerRequest.class);
    request.setContainerLaunchContext(ctx);

    LOG.info("Starting container, containerId=" + container.getId().toString() + ", host="
            + container.getNodeId().getHost() + ", http=" + container.getNodeHttpAddress());

    return containerManager.startContainer(request);
}

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From source file:org.springframework.yarn.am.container.DefaultContainerLauncher.java

License:Apache License

@Override
public void launchContainer(Container container, List<String> commands) {
    if (log.isDebugEnabled()) {
        log.debug("Launching container: " + container);
    }/*from www  .j a  v  a  2  s. c  o  m*/

    ContainerLaunchContext ctx = Records.newRecord(ContainerLaunchContext.class);
    String stagingId = container.getId().getApplicationAttemptId().getApplicationId().toString();
    getResourceLocalizer().setStagingId(stagingId);
    ctx.setLocalResources(getResourceLocalizer().getResources());
    ctx.setCommands(commands);

    // Yarn doesn't tell container what is its container id
    // so we do it here
    Map<String, String> env = getEnvironment();
    env.put(YarnSystemConstants.SYARN_CONTAINER_ID, ConverterUtils.toString(container.getId()));
    ctx.setEnvironment(env);
    ctx = getInterceptors().preLaunch(container, ctx);

    StartContainerRequest startContainerRequest = Records.newRecord(StartContainerRequest.class);
    startContainerRequest.setContainerLaunchContext(ctx);
    startContainerRequest.setContainerToken(container.getContainerToken());

    StartContainersRequest startContainersRequest = Records.newRecord(StartContainersRequest.class);
    ArrayList<StartContainerRequest> startContainerRequestList = new ArrayList<StartContainerRequest>();
    startContainerRequestList.add(startContainerRequest);
    startContainersRequest.setStartContainerRequests(startContainerRequestList);

    StartContainersResponse startContainersResponse = getCmTemplate(container)
            .startContainers(startContainersRequest);
    Map<ContainerId, SerializedException> failedRequests = startContainersResponse.getFailedRequests();
    List<ContainerId> successfullyStartedContainers = startContainersResponse
            .getSuccessfullyStartedContainers();
    // TODO: handle failed/success

    // notify interested parties of new launched container
    if (getYarnEventPublisher() != null) {
        getYarnEventPublisher().publishContainerLaunched(this, container);
    }
}

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