Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.inforefiner.hdata; import com.google.common.annotations.VisibleForTesting; import com.inforefiner.hdata.utils.HdfsUtil; import org.apache.commons.cli.*; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.classification.InterfaceAudience; import org.apache.hadoop.classification.InterfaceAudience.Private; import org.apache.hadoop.classification.InterfaceStability; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileStatus; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.DataOutputBuffer; import org.apache.hadoop.io.IOUtils; import org.apache.hadoop.net.NetUtils; import org.apache.hadoop.security.Credentials; import org.apache.hadoop.security.UserGroupInformation; import org.apache.hadoop.security.token.Token; import org.apache.hadoop.util.ExitUtil; import org.apache.hadoop.util.Shell; import org.apache.hadoop.yarn.api.ApplicationConstants; import org.apache.hadoop.yarn.api.ApplicationConstants.Environment; import org.apache.hadoop.yarn.api.ApplicationMasterProtocol; import org.apache.hadoop.yarn.api.ContainerManagementProtocol; import org.apache.hadoop.yarn.api.protocolrecords.*; import org.apache.hadoop.yarn.api.records.*; import org.apache.hadoop.yarn.api.records.timeline.TimelineEntity; import org.apache.hadoop.yarn.api.records.timeline.TimelineEvent; import org.apache.hadoop.yarn.api.records.timeline.TimelinePutResponse; import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest; import org.apache.hadoop.yarn.client.api.TimelineClient; import org.apache.hadoop.yarn.client.api.async.AMRMClientAsync; import org.apache.hadoop.yarn.client.api.async.NMClientAsync; import org.apache.hadoop.yarn.client.api.async.impl.NMClientAsyncImpl; import org.apache.hadoop.yarn.conf.YarnConfiguration; import org.apache.hadoop.yarn.exceptions.YarnException; import org.apache.hadoop.yarn.security.AMRMTokenIdentifier; import org.apache.hadoop.yarn.util.Apps; import org.apache.hadoop.yarn.util.ConverterUtils; import org.apache.hadoop.yarn.util.Records; import org.apache.log4j.LogManager; import java.io.*; import java.lang.reflect.UndeclaredThrowableException; import java.net.URI; import java.net.URISyntaxException; import java.nio.ByteBuffer; import java.security.PrivilegedExceptionAction; import java.util.*; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; import java.util.concurrent.atomic.AtomicInteger; /** * An ApplicationMaster for executing shell commands on a set of launched * containers using the YARN framework. * * <p> * This class is meant to act as an example on how to write yarn-based * application masters. * </p> * * <p> * The ApplicationMaster is started on a container by the * <code>ResourceManager</code>'s launcher. The first thing that the * <code>ApplicationMaster</code> needs to do is to connect and register itself * with the <code>ResourceManager</code>. The registration sets up information * within the <code>ResourceManager</code> regarding what host:port the * ApplicationMaster is listening on to provide any form of functionality to a * client as well as a tracking url that a client can use to keep track of * status/job history if needed. However, in the distributedshell, trackingurl * and appMasterHost:appMasterRpcPort are not supported. * </p> * * <p> * The <code>ApplicationMaster</code> needs to send a heartbeat to the * <code>ResourceManager</code> at regular intervals to inform the * <code>ResourceManager</code> that it is up and alive. The * {@link ApplicationMasterProtocol#allocate} to the <code>ResourceManager</code> from the * <code>ApplicationMaster</code> acts as a heartbeat. * * <p> * For the actual handling of the job, the <code>ApplicationMaster</code> has to * request the <code>ResourceManager</code> via {@link AllocateRequest} for the * required no. of containers using {@link ResourceRequest} with the necessary * resource specifications such as node location, computational * (memory/disk/cpu) resource requirements. The <code>ResourceManager</code> * responds with an {@link AllocateResponse} that informs the * <code>ApplicationMaster</code> of the set of newly allocated containers, * completed containers as well as current state of available resources. * </p> * * <p> * For each allocated container, the <code>ApplicationMaster</code> can then set * up the necessary launch context via {@link ContainerLaunchContext} to specify * the allocated container id, local resources required by the executable, the * environment to be setup for the executable, commands to execute, etc. and * submit a {@link StartContainerRequest} to the {@link ContainerManagementProtocol} to * launch and execute the defined commands on the given allocated container. * </p> * * <p> * The <code>ApplicationMaster</code> can monitor the launched container by * either querying the <code>ResourceManager</code> using * {@link ApplicationMasterProtocol#allocate} to get updates on completed containers or via * the {@link ContainerManagementProtocol} by querying for the status of the allocated * container's {@link ContainerId}. * * <p> * After the job has been completed, the <code>ApplicationMaster</code> has to * send a {@link FinishApplicationMasterRequest} to the * <code>ResourceManager</code> to inform it that the * <code>ApplicationMaster</code> has been completed. */ @InterfaceAudience.Public @InterfaceStability.Unstable public class ApplicationMaster { private static final Log LOG = LogFactory.getLog(ApplicationMaster.class); @VisibleForTesting @Private public static enum DSEvent { DS_APP_ATTEMPT_START, DS_APP_ATTEMPT_END, DS_CONTAINER_START, DS_CONTAINER_END } @VisibleForTesting @Private public static enum DSEntity { DS_APP_ATTEMPT, DS_CONTAINER } // Configuration private Configuration conf; // Handle to communicate with the Resource Manager @SuppressWarnings("rawtypes") private AMRMClientAsync amRMClient; // In both secure and non-secure modes, this points to the job-submitter. @VisibleForTesting UserGroupInformation appSubmitterUgi; // Handle to communicate with the Node Manager private NMClientAsync nmClientAsync; // Listen to process the response from the Node Manager private NMCallbackHandler containerListener; // Application Attempt Id ( combination of attemptId and fail count ) @VisibleForTesting protected ApplicationAttemptId appAttemptID; // TODO // For status update for clients - yet to be implemented // Hostname of the container private String appMasterHostname = ""; // Port on which the app master listens for status updates from clients private int appMasterRpcPort = -1; // Tracking url to which app master publishes info for clients to monitor private String appMasterTrackingUrl = ""; // App Master configuration // No. of containers to run shell command on @VisibleForTesting protected int numTotalContainers = 1; // Memory to request for the container on which the shell command will run private int containerMemory = 10; // VirtualCores to request for the container on which the shell command will run private int containerVirtualCores = 1; // Priority of the request private int requestPriority; // Counter for completed containers ( complete denotes successful or failed ) private AtomicInteger numCompletedContainers = new AtomicInteger(); // Allocated container count so that we know how many containers has the RM // allocated to us @VisibleForTesting protected AtomicInteger numAllocatedContainers = new AtomicInteger(); // Count of failed containers private AtomicInteger numFailedContainers = new AtomicInteger(); // Count of containers already requested from the RM // Needed as once requested, we should not request for containers again. // Only request for more if the original requirement changes. @VisibleForTesting protected AtomicInteger numRequestedContainers = new AtomicInteger(); // Shell command to be executed private String shellCommand = ""; // Args to be passed to the shell command private String shellArgs = ""; // Env variables to be setup for the shell command private Map<String, String> shellEnv = new HashMap<String, String>(); // Location of shell script ( obtained from info set in env ) // Shell script path in fs private String scriptPath = ""; // Timestamp needed for creating a local resource private long shellScriptPathTimestamp = 0; // File length needed for local resource private long shellScriptPathLen = 0; // Timeline domain ID private String domainId = null; // Hardcoded path to shell script in launch container's local env private static final String ExecShellStringPath = SubmitClient.SCRIPT_PATH + ".sh"; private static final String ExecBatScripStringtPath = SubmitClient.SCRIPT_PATH + ".bat"; // Hardcoded path to custom log_properties private static final String log4jPath = "log4j.properties"; private static final String shellCommandPath = "shellCommands"; private static final String shellArgsPath = "shellArgs"; private volatile boolean done; private ByteBuffer allTokens; // Launch threads private List<Thread> launchThreads = new ArrayList<Thread>(); // Timeline Client @VisibleForTesting TimelineClient timelineClient; private final String linux_bash_command = "bash"; private final String windows_command = "cmd /c"; private static String HDATA_PATH = "/hdata"; /** * @param args Command line args */ public static void main(String[] args) { boolean result = false; try { ApplicationMaster appMaster = new ApplicationMaster(); LOG.info("Initializing ApplicationMaster"); boolean doRun = appMaster.init(args); if (!doRun) { System.exit(0); } appMaster.run(); result = appMaster.finish(); } catch (Throwable t) { LOG.fatal("Error running ApplicationMaster", t); LogManager.shutdown(); ExitUtil.terminate(1, t); } if (result) { LOG.info("Application Master completed successfully. exiting"); System.exit(0); } else { LOG.info("Application Master failed. exiting"); System.exit(2); } } /** * Dump out contents of $CWD and the environment to stdout for debugging */ private void dumpOutDebugInfo() { LOG.info("Dump debug output"); Map<String, String> envs = System.getenv(); for (Map.Entry<String, String> env : envs.entrySet()) { LOG.info("System env: key=" + env.getKey() + ", val=" + env.getValue()); System.out.println("System env: key=" + env.getKey() + ", val=" + env.getValue()); } BufferedReader buf = null; try { String lines = Shell.WINDOWS ? Shell.execCommand("cmd", "/c", "dir") : Shell.execCommand("ls", "-al"); buf = new BufferedReader(new StringReader(lines)); String line = ""; while ((line = buf.readLine()) != null) { LOG.info("System CWD content: " + line); System.out.println("System CWD content: " + line); } } catch (IOException e) { e.printStackTrace(); } finally { IOUtils.cleanup(LOG, buf); } } public ApplicationMaster() { // Set up the configuration conf = new YarnConfiguration(); } /** * Parse command line options * * @param args Command line args * @return Whether init successful and run should be invoked * @throws ParseException * @throws IOException */ public boolean init(String[] args) throws ParseException, IOException { Options opts = new Options(); opts.addOption("app_attempt_id", true, "App Attempt ID. Not to be used unless for testing purposes"); opts.addOption("shell_env", true, "Environment for shell script. Specified as env_key=env_val pairs"); opts.addOption("container_memory", true, "Amount of memory in MB to be requested to run the shell command"); opts.addOption("container_vcores", true, "Amount of virtual cores to be requested to run the shell command"); opts.addOption("num_containers", true, "No. of containers on which the shell command needs to be executed"); opts.addOption("priority", true, "Application Priority. Default 0"); opts.addOption("debug", false, "Dump out debug information"); opts.addOption("help", false, "Print usage"); CommandLine cliParser = new GnuParser().parse(opts, args); if (args.length == 0) { printUsage(opts); throw new IllegalArgumentException("No args specified for application master to initialize"); } //Check whether customer log4j.properties file exists if (fileExist(log4jPath)) { try { Log4jPropertyHelper.updateLog4jConfiguration(ApplicationMaster.class, log4jPath); } catch (Exception e) { LOG.warn("Can not set up custom log4j properties. " + e); } } if (cliParser.hasOption("help")) { printUsage(opts); return false; } if (cliParser.hasOption("debug")) { dumpOutDebugInfo(); } Map<String, String> envs = System.getenv(); if (!envs.containsKey(Environment.CONTAINER_ID.name())) { if (cliParser.hasOption("app_attempt_id")) { String appIdStr = cliParser.getOptionValue("app_attempt_id", ""); appAttemptID = ConverterUtils.toApplicationAttemptId(appIdStr); } else { throw new IllegalArgumentException("Application Attempt Id not set in the environment"); } } else { ContainerId containerId = ConverterUtils.toContainerId(envs.get(Environment.CONTAINER_ID.name())); appAttemptID = containerId.getApplicationAttemptId(); } if (!envs.containsKey(ApplicationConstants.APP_SUBMIT_TIME_ENV)) { throw new RuntimeException(ApplicationConstants.APP_SUBMIT_TIME_ENV + " not set in the environment"); } if (!envs.containsKey(Environment.NM_HOST.name())) { throw new RuntimeException(Environment.NM_HOST.name() + " not set in the environment"); } if (!envs.containsKey(Environment.NM_HTTP_PORT.name())) { throw new RuntimeException(Environment.NM_HTTP_PORT + " not set in the environment"); } if (!envs.containsKey(Environment.NM_PORT.name())) { throw new RuntimeException(Environment.NM_PORT.name() + " not set in the environment"); } LOG.info("Application master for app" + ", appId=" + appAttemptID.getApplicationId().getId() + ", clustertimestamp=" + appAttemptID.getApplicationId().getClusterTimestamp() + ", attemptId=" + appAttemptID.getAttemptId()); if (!fileExist(shellCommandPath) && envs.get(DSConstants.DISTRIBUTEDSHELLSCRIPTLOCATION).isEmpty()) { throw new IllegalArgumentException( "No shell command or shell script specified to be executed by application master"); } if (fileExist(shellCommandPath)) { shellCommand = readContent(shellCommandPath); } if (fileExist(shellArgsPath)) { shellArgs = readContent(shellArgsPath); } if (cliParser.hasOption("shell_env")) { String shellEnvs[] = cliParser.getOptionValues("shell_env"); for (String env : shellEnvs) { env = env.trim(); int index = env.indexOf('='); if (index == -1) { shellEnv.put(env, ""); continue; } String key = env.substring(0, index); String val = ""; if (index < (env.length() - 1)) { val = env.substring(index + 1); } shellEnv.put(key, val); } } if (envs.containsKey(DSConstants.DISTRIBUTEDSHELLSCRIPTLOCATION)) { scriptPath = envs.get(DSConstants.DISTRIBUTEDSHELLSCRIPTLOCATION); if (envs.containsKey(DSConstants.DISTRIBUTEDSHELLSCRIPTTIMESTAMP)) { shellScriptPathTimestamp = Long.parseLong(envs.get(DSConstants.DISTRIBUTEDSHELLSCRIPTTIMESTAMP)); } if (envs.containsKey(DSConstants.DISTRIBUTEDSHELLSCRIPTLEN)) { shellScriptPathLen = Long.parseLong(envs.get(DSConstants.DISTRIBUTEDSHELLSCRIPTLEN)); } if (!scriptPath.isEmpty() && (shellScriptPathTimestamp <= 0 || shellScriptPathLen <= 0)) { LOG.error("Illegal values in env for shell script path" + ", path=" + scriptPath + ", len=" + shellScriptPathLen + ", timestamp=" + shellScriptPathTimestamp); throw new IllegalArgumentException("Illegal values in env for shell script path"); } } if (envs.containsKey(DSConstants.DISTRIBUTEDSHELLTIMELINEDOMAIN)) { domainId = envs.get(DSConstants.DISTRIBUTEDSHELLTIMELINEDOMAIN); } containerMemory = Integer.parseInt(cliParser.getOptionValue("container_memory", "10")); containerVirtualCores = Integer.parseInt(cliParser.getOptionValue("container_vcores", "1")); numTotalContainers = Integer.parseInt(cliParser.getOptionValue("num_containers", "1")); if (numTotalContainers == 0) { throw new IllegalArgumentException("Cannot run distributed shell with no containers"); } requestPriority = Integer.parseInt(cliParser.getOptionValue("priority", "0")); return true; } /** * Helper function to print usage * * @param opts Parsed command line options */ private void printUsage(Options opts) { new HelpFormatter().printHelp("ApplicationMaster", opts); } /** * Main run function for the application master * * @throws YarnException * @throws IOException */ @SuppressWarnings({ "unchecked" }) public void run() throws YarnException, IOException, InterruptedException { LOG.info("Starting ApplicationMaster"); // Note: Credentials, Token, UserGroupInformation, DataOutputBuffer class // are marked as LimitedPrivate 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<Token<?>> iter = credentials.getAllTokens().iterator(); LOG.info("Executing with tokens:"); while (iter.hasNext()) { Token<?> token = iter.next(); LOG.info(token); if (token.getKind().equals(AMRMTokenIdentifier.KIND_NAME)) { iter.remove(); } } allTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength()); // Create appSubmitterUgi and add original tokens to it String appSubmitterUserName = System.getenv(ApplicationConstants.Environment.USER.name()); appSubmitterUgi = UserGroupInformation.createRemoteUser(appSubmitterUserName); appSubmitterUgi.addCredentials(credentials); AMRMClientAsync.CallbackHandler allocListener = new RMCallbackHandler(); amRMClient = AMRMClientAsync.createAMRMClientAsync(1000, allocListener); amRMClient.init(conf); amRMClient.start(); containerListener = createNMCallbackHandler(); nmClientAsync = new NMClientAsyncImpl(containerListener); nmClientAsync.init(conf); nmClientAsync.start(); startTimelineClient(conf); if (timelineClient != null) { publishApplicationAttemptEvent(timelineClient, appAttemptID.toString(), DSEvent.DS_APP_ATTEMPT_START, domainId, appSubmitterUgi); } // Setup local RPC Server to accept status requests directly from clients // TODO need to setup a protocol for client to be able to communicate to // the RPC server // TODO use the rpc port info to register with the RM for the client to // send requests to this app master // Register self with ResourceManager // This will start heartbeating to the RM appMasterHostname = NetUtils.getHostname(); RegisterApplicationMasterResponse response = amRMClient.registerApplicationMaster(appMasterHostname, appMasterRpcPort, appMasterTrackingUrl); // Dump out information about cluster capability as seen by the // resource manager int maxMem = response.getMaximumResourceCapability().getMemory(); LOG.info("Max mem capabililty of resources in this cluster " + maxMem); int maxVCores = response.getMaximumResourceCapability().getVirtualCores(); LOG.info("Max vcores capabililty of resources in this cluster " + maxVCores); // A resource ask cannot exceed the max. if (containerMemory > maxMem) { LOG.info("Container memory specified above max threshold of cluster." + " Using max value." + ", specified=" + containerMemory + ", max=" + maxMem); containerMemory = maxMem; } if (containerVirtualCores > maxVCores) { LOG.info("Container virtual cores specified above max threshold of cluster." + " Using max value." + ", specified=" + containerVirtualCores + ", max=" + maxVCores); containerVirtualCores = maxVCores; } List<Container> previousAMRunningContainers = response.getContainersFromPreviousAttempts(); LOG.info(appAttemptID + " received " + previousAMRunningContainers.size() + " previous attempts' running containers on AM registration."); numAllocatedContainers.addAndGet(previousAMRunningContainers.size()); int numTotalContainersToRequest = numTotalContainers - previousAMRunningContainers.size(); // Setup ask for containers from RM // Send request for containers to RM // Until we get our fully allocated quota, we keep on polling RM for // containers // Keep looping until all the containers are launched and shell script // executed on them ( regardless of success/failure). for (int i = 0; i < numTotalContainersToRequest; ++i) { ContainerRequest containerAsk = setupContainerAskForRM(); amRMClient.addContainerRequest(containerAsk); } numRequestedContainers.set(numTotalContainers); } @VisibleForTesting void startTimelineClient(final Configuration conf) throws YarnException, IOException, InterruptedException { try { appSubmitterUgi.doAs(new PrivilegedExceptionAction<Void>() { @Override public Void run() throws Exception { if (conf.getBoolean(YarnConfiguration.TIMELINE_SERVICE_ENABLED, YarnConfiguration.DEFAULT_TIMELINE_SERVICE_ENABLED)) { // Creating the Timeline Client timelineClient = TimelineClient.createTimelineClient(); timelineClient.init(conf); timelineClient.start(); } else { timelineClient = null; LOG.warn("Timeline service is not enabled"); } return null; } }); } catch (UndeclaredThrowableException e) { throw new YarnException(e.getCause()); } } @VisibleForTesting NMCallbackHandler createNMCallbackHandler() { return new NMCallbackHandler(this); } @VisibleForTesting protected boolean finish() { // wait for completion. while (!done && (numCompletedContainers.get() != numTotalContainers)) { try { Thread.sleep(200); } catch (InterruptedException ex) { } } if (timelineClient != null) { publishApplicationAttemptEvent(timelineClient, appAttemptID.toString(), DSEvent.DS_APP_ATTEMPT_END, domainId, appSubmitterUgi); } // Join all launched threads // needed for when we time out // and we need to release containers for (Thread launchThread : launchThreads) { try { launchThread.join(10000); } catch (InterruptedException e) { LOG.info("Exception thrown in thread join: " + e.getMessage()); e.printStackTrace(); } } // When the application completes, it should stop all running containers LOG.info("Application completed. Stopping running containers"); nmClientAsync.stop(); // When the application completes, it should send a finish application // signal to the RM LOG.info("Application completed. Signalling finish to RM"); FinalApplicationStatus appStatus; String appMessage = null; boolean success = true; if (numFailedContainers.get() == 0 && numCompletedContainers.get() == numTotalContainers) { appStatus = FinalApplicationStatus.SUCCEEDED; } else { appStatus = FinalApplicationStatus.FAILED; appMessage = "Diagnostics." + ", total=" + numTotalContainers + ", completed=" + numCompletedContainers.get() + ", allocated=" + numAllocatedContainers.get() + ", failed=" + numFailedContainers.get(); LOG.info(appMessage); success = false; } try { amRMClient.unregisterApplicationMaster(appStatus, appMessage, null); } catch (YarnException ex) { LOG.error("Failed to unregister application", ex); } catch (IOException e) { LOG.error("Failed to unregister application", e); } amRMClient.stop(); // Stop Timeline Client if (timelineClient != null) { timelineClient.stop(); } return success; } private class RMCallbackHandler implements AMRMClientAsync.CallbackHandler { @SuppressWarnings("unchecked") @Override public void onContainersCompleted(List<ContainerStatus> completedContainers) { LOG.info("Got response from RM for container ask, completedCnt=" + completedContainers.size()); for (ContainerStatus containerStatus : completedContainers) { LOG.info(appAttemptID + " got container status for containerID=" + containerStatus.getContainerId() + ", state=" + containerStatus.getState() + ", exitStatus=" + containerStatus.getExitStatus() + ", diagnostics=" + containerStatus.getDiagnostics()); // non complete containers should not be here assert (containerStatus.getState() == ContainerState.COMPLETE); // increment counters for completed/failed containers int exitStatus = containerStatus.getExitStatus(); if (0 != exitStatus) { // container failed if (ContainerExitStatus.ABORTED != exitStatus) { // shell script failed // counts as completed numCompletedContainers.incrementAndGet(); numFailedContainers.incrementAndGet(); } else { // container was killed by framework, possibly preempted // we should re-try as the container was lost for some reason numAllocatedContainers.decrementAndGet(); numRequestedContainers.decrementAndGet(); // we do not need to release the container as it would be done // by the RM } } else { // nothing to do // container completed successfully numCompletedContainers.incrementAndGet(); LOG.info("Container completed successfully." + ", containerId=" + containerStatus.getContainerId()); } if (timelineClient != null) { publishContainerEndEvent(timelineClient, containerStatus, domainId, appSubmitterUgi); } } // ask for more containers if any failed int askCount = numTotalContainers - numRequestedContainers.get(); numRequestedContainers.addAndGet(askCount); if (askCount > 0) { for (int i = 0; i < askCount; ++i) { ContainerRequest containerAsk = setupContainerAskForRM(); amRMClient.addContainerRequest(containerAsk); } } if (numCompletedContainers.get() == numTotalContainers) { done = true; } } @Override public void onContainersAllocated(List<Container> allocatedContainers) { LOG.info("Got response from RM for container ask, allocatedCnt=" + allocatedContainers.size()); numAllocatedContainers.addAndGet(allocatedContainers.size()); for (Container allocatedContainer : allocatedContainers) { LOG.info("Launching shell command on a new container." + ", containerId=" + allocatedContainer.getId() + ", containerNode=" + allocatedContainer.getNodeId().getHost() + ":" + allocatedContainer.getNodeId().getPort() + ", containerNodeURI=" + allocatedContainer.getNodeHttpAddress() + ", containerResourceMemory" + allocatedContainer.getResource().getMemory() + ", containerResourceVirtualCores" + allocatedContainer.getResource().getVirtualCores()); // + ", containerToken" // +allocatedContainer.getContainerToken().getIdentifier().toString()); LaunchContainerRunnable runnableLaunchContainer = new LaunchContainerRunnable(allocatedContainer, containerListener); Thread launchThread = new Thread(runnableLaunchContainer); // launch and start the container on a separate thread to keep // the main thread unblocked // as all containers may not be allocated at one go. launchThreads.add(launchThread); launchThread.start(); } } @Override public void onShutdownRequest() { done = true; } @Override public void onNodesUpdated(List<NodeReport> updatedNodes) { } @Override public float getProgress() { // set progress to deliver to RM on next heartbeat float progress = (float) numCompletedContainers.get() / numTotalContainers; return progress; } @Override public void onError(Throwable e) { done = true; amRMClient.stop(); } } @VisibleForTesting static class NMCallbackHandler implements NMClientAsync.CallbackHandler { private ConcurrentMap<ContainerId, Container> containers = new ConcurrentHashMap<ContainerId, Container>(); private final ApplicationMaster applicationMaster; public NMCallbackHandler(ApplicationMaster applicationMaster) { this.applicationMaster = applicationMaster; } public void addContainer(ContainerId containerId, Container container) { containers.putIfAbsent(containerId, container); } @Override public void onContainerStopped(ContainerId containerId) { if (LOG.isDebugEnabled()) { LOG.debug("Succeeded to stop Container " + containerId); } containers.remove(containerId); } @Override public void onContainerStatusReceived(ContainerId containerId, ContainerStatus containerStatus) { if (LOG.isDebugEnabled()) { LOG.debug("Container Status: id=" + containerId + ", status=" + containerStatus); } } @Override public void onContainerStarted(ContainerId containerId, Map<String, ByteBuffer> allServiceResponse) { if (LOG.isDebugEnabled()) { LOG.debug("Succeeded to start Container " + containerId); } Container container = containers.get(containerId); if (container != null) { applicationMaster.nmClientAsync.getContainerStatusAsync(containerId, container.getNodeId()); } if (applicationMaster.timelineClient != null) { ApplicationMaster.publishContainerStartEvent(applicationMaster.timelineClient, container, applicationMaster.domainId, applicationMaster.appSubmitterUgi); } } @Override public void onStartContainerError(ContainerId containerId, Throwable t) { LOG.error("Failed to start Container " + containerId); containers.remove(containerId); applicationMaster.numCompletedContainers.incrementAndGet(); applicationMaster.numFailedContainers.incrementAndGet(); } @Override public void onGetContainerStatusError(ContainerId containerId, Throwable t) { LOG.error("Failed to query the status of Container " + containerId); } @Override public void onStopContainerError(ContainerId containerId, Throwable t) { LOG.error("Failed to stop Container " + containerId); containers.remove(containerId); } } /** * Thread to connect to the {@link ContainerManagementProtocol} and launch the container * that will execute the shell command. */ private class LaunchContainerRunnable implements Runnable { HdfsUtil hdfsUtil; // Allocated container Container container; NMCallbackHandler containerListener; /** * @param lcontainer Allocated container * @param containerListener Callback handler of the container */ public LaunchContainerRunnable(Container lcontainer, NMCallbackHandler containerListener) { this.container = lcontainer; this.containerListener = containerListener; this.hdfsUtil = new HdfsUtil(new Configuration()); } @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()); // 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; } URL yarnUrl = null; try { yarnUrl = 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; } LocalResource shellRsrc = LocalResource.newInstance(yarnUrl, LocalResourceType.FILE, LocalResourceVisibility.APPLICATION, shellScriptPathLen, shellScriptPathTimestamp); localResources.put(Shell.WINDOWS ? ExecBatScripStringtPath : ExecShellStringPath, shellRsrc); shellCommand = Shell.WINDOWS ? windows_command : linux_bash_command; } // 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()); // Set up ContainerLaunchContext, setting local resource, environment, // command and token for constructor. // Note for tokens: 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 anyfiles 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. setupAppEnv(shellEnv, localResources); ContainerLaunchContext ctx = ContainerLaunchContext.newInstance(localResources, shellEnv, commands, null, allTokens.duplicate(), null); containerListener.addContainer(container.getId(), container); nmClientAsync.startContainerAsync(container, ctx); } private URL Path2Url(Path path) { URI uri = path.toUri(); String pathStr = path.toString(); int idx = path.toString().indexOf("/", 7); return URL.newInstance(uri.getScheme(), uri.getHost(), uri.getPort(), pathStr.substring(idx)); } private void setupAppEnv(Map<String, String> appEnv, Map<String, LocalResource> localResources) { try { String[] targets = new String[] { "conf", "lib", "bin", "plugins" }; for (String str : targets) { List<FileStatus> list = hdfsUtil.list(HDATA_PATH + File.separator + str); for (FileStatus status : list) { // LOG.info("setting app env, file = " + status.getPath()); LocalResource resource = Records.newRecord(LocalResource.class); resource.setResource(Path2Url(status.getPath())); resource.setType(LocalResourceType.FILE); resource.setVisibility(LocalResourceVisibility.APPLICATION); resource.setSize(status.getLen()); resource.setTimestamp(status.getModificationTime()); resource.setShouldBeUploadedToSharedCache(true); String path = status.getPath().toString(); int idx = path.indexOf(str); localResources.put(path.substring(idx), resource); } } } catch (Exception e) { e.printStackTrace(); } Apps.addToEnvironment(appEnv, ApplicationConstants.Environment.CLASSPATH.name(), ApplicationConstants.Environment.PWD.$() + File.separator + "*", File.pathSeparator); // Apps.addToEnvironment(appEnv, // ApplicationConstants.Environment.USER.name(), // "europa", File.pathSeparator); // Apps.addToEnvironment(appEnv, // ApplicationConstants.Environment.CLASSPATH.name(), // ApplicationConstants.Environment.PWD.$() + File.separator + "libs/*", // File.pathSeparator); } } private void renameScriptFile(final Path renamedScriptPath) throws IOException, InterruptedException { appSubmitterUgi.doAs(new PrivilegedExceptionAction<Void>() { @Override public Void run() throws IOException { FileSystem fs = renamedScriptPath.getFileSystem(conf); fs.rename(new Path(scriptPath), renamedScriptPath); return null; } }); LOG.info("User " + appSubmitterUgi.getUserName() + " added suffix(.sh/.bat) to script file as " + renamedScriptPath); } /** * Setup the request that will be sent to the RM for the container ask. * * @return the setup ResourceRequest to be sent to RM */ private ContainerRequest setupContainerAskForRM() { // setup requirements for hosts // using * as any host will do for the distributed shell app // set the priority for the request // TODO - what is the range for priority? how to decide? Priority pri = Priority.newInstance(requestPriority); // Set up resource type requirements // For now, memory and CPU are supported so we set memory and cpu requirements Resource capability = Resource.newInstance(containerMemory, containerVirtualCores); ContainerRequest request = new ContainerRequest(capability, null, null, pri); LOG.info("Requested container ask: " + request.toString()); return request; } private boolean fileExist(String filePath) { return new File(filePath).exists(); } private String readContent(String filePath) throws IOException { DataInputStream ds = null; try { ds = new DataInputStream(new FileInputStream(filePath)); return ds.readUTF(); } finally { org.apache.commons.io.IOUtils.closeQuietly(ds); } } private static void publishContainerStartEvent(final TimelineClient timelineClient, Container container, String domainId, UserGroupInformation ugi) { final TimelineEntity entity = new TimelineEntity(); entity.setEntityId(container.getId().toString()); entity.setEntityType(DSEntity.DS_CONTAINER.toString()); entity.setDomainId(domainId); entity.addPrimaryFilter("user", ugi.getShortUserName()); TimelineEvent event = new TimelineEvent(); event.setTimestamp(System.currentTimeMillis()); event.setEventType(DSEvent.DS_CONTAINER_START.toString()); event.addEventInfo("Node", container.getNodeId().toString()); event.addEventInfo("Resources", container.getResource().toString()); entity.addEvent(event); try { ugi.doAs(new PrivilegedExceptionAction<TimelinePutResponse>() { @Override public TimelinePutResponse run() throws Exception { return timelineClient.putEntities(entity); } }); } catch (Exception e) { LOG.error("Container start event could not be published for " + container.getId().toString(), e instanceof UndeclaredThrowableException ? e.getCause() : e); } } private static void publishContainerEndEvent(final TimelineClient timelineClient, ContainerStatus container, String domainId, UserGroupInformation ugi) { final TimelineEntity entity = new TimelineEntity(); entity.setEntityId(container.getContainerId().toString()); entity.setEntityType(DSEntity.DS_CONTAINER.toString()); entity.setDomainId(domainId); entity.addPrimaryFilter("user", ugi.getShortUserName()); TimelineEvent event = new TimelineEvent(); event.setTimestamp(System.currentTimeMillis()); event.setEventType(DSEvent.DS_CONTAINER_END.toString()); event.addEventInfo("State", container.getState().name()); event.addEventInfo("Exit Status", container.getExitStatus()); entity.addEvent(event); try { timelineClient.putEntities(entity); } catch (YarnException | IOException e) { LOG.error("Container end event could not be published for " + container.getContainerId().toString(), e); } } private static void publishApplicationAttemptEvent(final TimelineClient timelineClient, String appAttemptId, DSEvent appEvent, String domainId, UserGroupInformation ugi) { final TimelineEntity entity = new TimelineEntity(); entity.setEntityId(appAttemptId); entity.setEntityType(DSEntity.DS_APP_ATTEMPT.toString()); entity.setDomainId(domainId); entity.addPrimaryFilter("user", ugi.getShortUserName()); TimelineEvent event = new TimelineEvent(); event.setEventType(appEvent.toString()); event.setTimestamp(System.currentTimeMillis()); entity.addEvent(event); try { timelineClient.putEntities(entity); } catch (YarnException | IOException e) { LOG.error("App Attempt " + (appEvent.equals(DSEvent.DS_APP_ATTEMPT_START) ? "start" : "end") + " event could not be published for " + appAttemptId.toString(), e); } } }