Examples with MRAppMaster org.apache.hadoop.mapreduce.v2.app.MRAppMaster used on opensource projects

Example 1 with MRAppMaster

use of org.apache.hadoop.mapreduce.v2.app.MRAppMaster in project hadoop by apache.

the class MRAppMaster method serviceInit.

@Override
protected void serviceInit(final Configuration conf) throws Exception {
    // create the job classloader if enabled
    createJobClassLoader(conf);
    conf.setBoolean(Dispatcher.DISPATCHER_EXIT_ON_ERROR_KEY, true);
    initJobCredentialsAndUGI(conf);
    dispatcher = createDispatcher();
    addIfService(dispatcher);
    taskAttemptFinishingMonitor = createTaskAttemptFinishingMonitor(dispatcher.getEventHandler());
    addIfService(taskAttemptFinishingMonitor);
    context = new RunningAppContext(conf, taskAttemptFinishingMonitor);
    // Job name is the same as the app name util we support DAG of jobs
    // for an app later
    appName = conf.get(MRJobConfig.JOB_NAME, "<missing app name>");
    conf.setInt(MRJobConfig.APPLICATION_ATTEMPT_ID, appAttemptID.getAttemptId());
    newApiCommitter = false;
    jobId = MRBuilderUtils.newJobId(appAttemptID.getApplicationId(), appAttemptID.getApplicationId().getId());
    int numReduceTasks = conf.getInt(MRJobConfig.NUM_REDUCES, 0);
    if ((numReduceTasks > 0 && conf.getBoolean("mapred.reducer.new-api", false)) || (numReduceTasks == 0 && conf.getBoolean("mapred.mapper.new-api", false))) {
        newApiCommitter = true;
        LOG.info("Using mapred newApiCommitter.");
    }
    boolean copyHistory = false;
    committer = createOutputCommitter(conf);
    try {
        String user = UserGroupInformation.getCurrentUser().getShortUserName();
        Path stagingDir = MRApps.getStagingAreaDir(conf, user);
        FileSystem fs = getFileSystem(conf);
        boolean stagingExists = fs.exists(stagingDir);
        Path startCommitFile = MRApps.getStartJobCommitFile(conf, user, jobId);
        boolean commitStarted = fs.exists(startCommitFile);
        Path endCommitSuccessFile = MRApps.getEndJobCommitSuccessFile(conf, user, jobId);
        boolean commitSuccess = fs.exists(endCommitSuccessFile);
        Path endCommitFailureFile = MRApps.getEndJobCommitFailureFile(conf, user, jobId);
        boolean commitFailure = fs.exists(endCommitFailureFile);
        if (!stagingExists) {
            isLastAMRetry = true;
            LOG.info("Attempt num: " + appAttemptID.getAttemptId() + " is last retry: " + isLastAMRetry + " because the staging dir doesn't exist.");
            errorHappenedShutDown = true;
            forcedState = JobStateInternal.ERROR;
            shutDownMessage = "Staging dir does not exist " + stagingDir;
            LOG.fatal(shutDownMessage);
        } else if (commitStarted) {
            //A commit was started so this is the last time, we just need to know
            // what result we will use to notify, and how we will unregister
            errorHappenedShutDown = true;
            isLastAMRetry = true;
            LOG.info("Attempt num: " + appAttemptID.getAttemptId() + " is last retry: " + isLastAMRetry + " because a commit was started.");
            copyHistory = true;
            if (commitSuccess) {
                shutDownMessage = "Job commit succeeded in a prior MRAppMaster attempt " + "before it crashed. Recovering.";
                forcedState = JobStateInternal.SUCCEEDED;
            } else if (commitFailure) {
                shutDownMessage = "Job commit failed in a prior MRAppMaster attempt " + "before it crashed. Not retrying.";
                forcedState = JobStateInternal.FAILED;
            } else {
                if (isCommitJobRepeatable()) {
                    // cleanup previous half done commits if committer supports
                    // repeatable job commit.
                    errorHappenedShutDown = false;
                    cleanupInterruptedCommit(conf, fs, startCommitFile);
                } else {
                    //The commit is still pending, commit error
                    shutDownMessage = "Job commit from a prior MRAppMaster attempt is " + "potentially in progress. Preventing multiple commit executions";
                    forcedState = JobStateInternal.ERROR;
                }
            }
        }
    } catch (IOException e) {
        throw new YarnRuntimeException("Error while initializing", e);
    }
    if (errorHappenedShutDown) {
        NoopEventHandler eater = new NoopEventHandler();
        //We do not have a JobEventDispatcher in this path
        dispatcher.register(JobEventType.class, eater);
        EventHandler<JobHistoryEvent> historyService = null;
        if (copyHistory) {
            historyService = createJobHistoryHandler(context);
            dispatcher.register(org.apache.hadoop.mapreduce.jobhistory.EventType.class, historyService);
        } else {
            dispatcher.register(org.apache.hadoop.mapreduce.jobhistory.EventType.class, eater);
        }
        if (copyHistory) {
            // Now that there's a FINISHING state for application on RM to give AMs
            // plenty of time to clean up after unregister it's safe to clean staging
            // directory after unregistering with RM. So, we start the staging-dir
            // cleaner BEFORE the ContainerAllocator so that on shut-down,
            // ContainerAllocator unregisters first and then the staging-dir cleaner
            // deletes staging directory.
            addService(createStagingDirCleaningService());
        }
        // service to allocate containers from RM (if non-uber) or to fake it (uber)
        containerAllocator = createContainerAllocator(null, context);
        addIfService(containerAllocator);
        dispatcher.register(ContainerAllocator.EventType.class, containerAllocator);
        if (copyHistory) {
            // Add the JobHistoryEventHandler last so that it is properly stopped first.
            // This will guarantee that all history-events are flushed before AM goes
            // ahead with shutdown.
            // Note: Even though JobHistoryEventHandler is started last, if any
            // component creates a JobHistoryEvent in the meanwhile, it will be just be
            // queued inside the JobHistoryEventHandler 
            addIfService(historyService);
            JobHistoryCopyService cpHist = new JobHistoryCopyService(appAttemptID, dispatcher.getEventHandler());
            addIfService(cpHist);
        }
    } else {
        //service to handle requests from JobClient
        clientService = createClientService(context);
        // Init ClientService separately so that we stop it separately, since this
        // service needs to wait some time before it stops so clients can know the
        // final states
        clientService.init(conf);
        containerAllocator = createContainerAllocator(clientService, context);
        //service to handle the output committer
        committerEventHandler = createCommitterEventHandler(context, committer);
        addIfService(committerEventHandler);
        //policy handling preemption requests from RM
        callWithJobClassLoader(conf, new Action<Void>() {

            public Void call(Configuration conf) {
                preemptionPolicy = createPreemptionPolicy(conf);
                preemptionPolicy.init(context);
                return null;
            }
        });
        //service to handle requests to TaskUmbilicalProtocol
        taskAttemptListener = createTaskAttemptListener(context, preemptionPolicy);
        addIfService(taskAttemptListener);
        //service to log job history events
        EventHandler<JobHistoryEvent> historyService = createJobHistoryHandler(context);
        dispatcher.register(org.apache.hadoop.mapreduce.jobhistory.EventType.class, historyService);
        this.jobEventDispatcher = new JobEventDispatcher();
        //register the event dispatchers
        dispatcher.register(JobEventType.class, jobEventDispatcher);
        dispatcher.register(TaskEventType.class, new TaskEventDispatcher());
        dispatcher.register(TaskAttemptEventType.class, new TaskAttemptEventDispatcher());
        dispatcher.register(CommitterEventType.class, committerEventHandler);
        if (conf.getBoolean(MRJobConfig.MAP_SPECULATIVE, false) || conf.getBoolean(MRJobConfig.REDUCE_SPECULATIVE, false)) {
            //optional service to speculate on task attempts' progress
            speculator = createSpeculator(conf, context);
            addIfService(speculator);
        }
        speculatorEventDispatcher = new SpeculatorEventDispatcher(conf);
        dispatcher.register(Speculator.EventType.class, speculatorEventDispatcher);
        // Now that there's a FINISHING state for application on RM to give AMs
        // plenty of time to clean up after unregister it's safe to clean staging
        // directory after unregistering with RM. So, we start the staging-dir
        // cleaner BEFORE the ContainerAllocator so that on shut-down,
        // ContainerAllocator unregisters first and then the staging-dir cleaner
        // deletes staging directory.
        addService(createStagingDirCleaningService());
        // service to allocate containers from RM (if non-uber) or to fake it (uber)
        addIfService(containerAllocator);
        dispatcher.register(ContainerAllocator.EventType.class, containerAllocator);
        // corresponding service to launch allocated containers via NodeManager
        containerLauncher = createContainerLauncher(context);
        addIfService(containerLauncher);
        dispatcher.register(ContainerLauncher.EventType.class, containerLauncher);
        // Add the JobHistoryEventHandler last so that it is properly stopped first.
        // This will guarantee that all history-events are flushed before AM goes
        // ahead with shutdown.
        // Note: Even though JobHistoryEventHandler is started last, if any
        // component creates a JobHistoryEvent in the meanwhile, it will be just be
        // queued inside the JobHistoryEventHandler 
        addIfService(historyService);
    }
    super.serviceInit(conf);
}

Example 2 with MRAppMaster

use of org.apache.hadoop.mapreduce.v2.app.MRAppMaster in project hadoop by apache.

the class MRAppMaster method serviceStart.

@SuppressWarnings("unchecked")
@Override
protected void serviceStart() throws Exception {
    amInfos = new LinkedList<AMInfo>();
    completedTasksFromPreviousRun = new HashMap<TaskId, TaskInfo>();
    processRecovery();
    // Current an AMInfo for the current AM generation.
    AMInfo amInfo = MRBuilderUtils.newAMInfo(appAttemptID, startTime, containerID, nmHost, nmPort, nmHttpPort);
    // /////////////////// Create the job itself.
    job = createJob(getConfig(), forcedState, shutDownMessage);
    // Send out an MR AM inited event for all previous AMs.
    for (AMInfo info : amInfos) {
        dispatcher.getEventHandler().handle(new JobHistoryEvent(job.getID(), new AMStartedEvent(info.getAppAttemptId(), info.getStartTime(), info.getContainerId(), info.getNodeManagerHost(), info.getNodeManagerPort(), info.getNodeManagerHttpPort(), appSubmitTime)));
    }
    // Send out an MR AM inited event for this AM.
    dispatcher.getEventHandler().handle(new JobHistoryEvent(job.getID(), new AMStartedEvent(amInfo.getAppAttemptId(), amInfo.getStartTime(), amInfo.getContainerId(), amInfo.getNodeManagerHost(), amInfo.getNodeManagerPort(), amInfo.getNodeManagerHttpPort(), this.forcedState == null ? null : this.forcedState.toString(), appSubmitTime)));
    amInfos.add(amInfo);
    // metrics system init is really init & start.
    // It's more test friendly to put it here.
    DefaultMetricsSystem.initialize("MRAppMaster");
    boolean initFailed = false;
    if (!errorHappenedShutDown) {
        // create a job event for job intialization
        JobEvent initJobEvent = new JobEvent(job.getID(), JobEventType.JOB_INIT);
        // Send init to the job (this does NOT trigger job execution)
        // This is a synchronous call, not an event through dispatcher. We want
        // job-init to be done completely here.
        jobEventDispatcher.handle(initJobEvent);
        // If job is still not initialized, an error happened during
        // initialization. Must complete starting all of the services so failure
        // events can be processed.
        initFailed = (((JobImpl) job).getInternalState() != JobStateInternal.INITED);
        if (job.isUber()) {
            speculatorEventDispatcher.disableSpeculation();
            LOG.info("MRAppMaster uberizing job " + job.getID() + " in local container (\"uber-AM\") on node " + nmHost + ":" + nmPort + ".");
        } else {
            // send init to speculator only for non-uber jobs. 
            // This won't yet start as dispatcher isn't started yet.
            dispatcher.getEventHandler().handle(new SpeculatorEvent(job.getID(), clock.getTime()));
            LOG.info("MRAppMaster launching normal, non-uberized, multi-container " + "job " + job.getID() + ".");
        }
        // Start ClientService here, since it's not initialized if
        // errorHappenedShutDown is true
        clientService.start();
    }
    //start all the components
    super.serviceStart();
    // finally set the job classloader
    MRApps.setClassLoader(jobClassLoader, getConfig());
    // set job classloader if configured
    Limits.init(getConfig());
    if (initFailed) {
        JobEvent initFailedEvent = new JobEvent(job.getID(), JobEventType.JOB_INIT_FAILED);
        jobEventDispatcher.handle(initFailedEvent);
    } else {
        // All components have started, start the job.
        startJobs();
    }
}

Example 3 with MRAppMaster

use of org.apache.hadoop.mapreduce.v2.app.MRAppMaster in project hadoop by apache.

the class TestJobEndNotifier method testNotificationOnLastRetryUnregistrationFailure.

@Test
public void testNotificationOnLastRetryUnregistrationFailure() throws Exception {
    HttpServer2 server = startHttpServer();
    MRApp app = spy(new MRAppWithCustomContainerAllocator(2, 2, false, this.getClass().getName(), true, 2, false));
    // Currently, we will have isLastRetry always equals to false at beginning
    // of MRAppMaster, except staging area exists or commit already started at 
    // the beginning.
    // Now manually set isLastRetry to true and this should reset to false when
    // unregister failed.
    app.isLastAMRetry = true;
    doNothing().when(app).sysexit();
    JobConf conf = new JobConf();
    conf.set(JobContext.MR_JOB_END_NOTIFICATION_URL, JobEndServlet.baseUrl + "jobend?jobid=$jobId&status=$jobStatus");
    JobImpl job = (JobImpl) app.submit(conf);
    app.waitForState(job, JobState.RUNNING);
    app.getContext().getEventHandler().handle(new JobEvent(app.getJobId(), JobEventType.JOB_AM_REBOOT));
    app.waitForInternalState(job, JobStateInternal.REBOOT);
    // Now shutdown. User should see FAILED state.
    // Unregistration fails: isLastAMRetry is recalculated, this is
    ///reboot will stop service internally, we don't need to shutdown twice
    app.waitForServiceToStop(10000);
    Assert.assertFalse(app.isLastAMRetry());
    // Since it's not last retry, JobEndServlet didn't called
    Assert.assertEquals(0, JobEndServlet.calledTimes);
    Assert.assertNull(JobEndServlet.requestUri);
    Assert.assertNull(JobEndServlet.foundJobState);
    server.stop();
}

Example 4 with MRAppMaster

use of org.apache.hadoop.mapreduce.v2.app.MRAppMaster in project hadoop by apache.

the class MRAppMasterTestLaunchTime method testMRAppMasterSuccessLock.

@Test
public void testMRAppMasterSuccessLock() throws IOException, InterruptedException {
    String applicationAttemptIdStr = "appattempt_1317529182569_0004_000002";
    String containerIdStr = "container_1317529182569_0004_000002_1";
    String userName = "TestAppMasterUser";
    JobConf conf = new JobConf();
    conf.set(MRJobConfig.MR_AM_STAGING_DIR, stagingDir);
    ApplicationAttemptId applicationAttemptId = ApplicationAttemptId.fromString(applicationAttemptIdStr);
    JobId jobId = TypeConverter.toYarn(TypeConverter.fromYarn(applicationAttemptId.getApplicationId()));
    Path start = MRApps.getStartJobCommitFile(conf, userName, jobId);
    Path end = MRApps.getEndJobCommitSuccessFile(conf, userName, jobId);
    FileSystem fs = FileSystem.get(conf);
    fs.create(start).close();
    fs.create(end).close();
    ContainerId containerId = ContainerId.fromString(containerIdStr);
    MRAppMaster appMaster = new MRAppMasterTest(applicationAttemptId, containerId, "host", -1, -1, System.currentTimeMillis(), false, false);
    boolean caught = false;
    try {
        MRAppMaster.initAndStartAppMaster(appMaster, conf, userName);
    } catch (IOException e) {
        //The IO Exception is expected
        LOG.info("Caught expected Exception", e);
        caught = true;
    }
    assertTrue(caught);
    assertTrue(appMaster.errorHappenedShutDown);
    assertEquals(JobStateInternal.SUCCEEDED, appMaster.forcedState);
    appMaster.stop();
    // verify the final status is SUCCEEDED
    verifyFailedStatus((MRAppMasterTest) appMaster, "SUCCEEDED");
}

Example 5 with MRAppMaster

use of org.apache.hadoop.mapreduce.v2.app.MRAppMaster in project hadoop by apache.

the class MRAppMasterTestLaunchTime method testMRAppMasterFailLock.

@Test
public void testMRAppMasterFailLock() throws IOException, InterruptedException {
    String applicationAttemptIdStr = "appattempt_1317529182569_0004_000002";
    String containerIdStr = "container_1317529182569_0004_000002_1";
    String userName = "TestAppMasterUser";
    JobConf conf = new JobConf();
    conf.set(MRJobConfig.MR_AM_STAGING_DIR, stagingDir);
    ApplicationAttemptId applicationAttemptId = ApplicationAttemptId.fromString(applicationAttemptIdStr);
    JobId jobId = TypeConverter.toYarn(TypeConverter.fromYarn(applicationAttemptId.getApplicationId()));
    Path start = MRApps.getStartJobCommitFile(conf, userName, jobId);
    Path end = MRApps.getEndJobCommitFailureFile(conf, userName, jobId);
    FileSystem fs = FileSystem.get(conf);
    fs.create(start).close();
    fs.create(end).close();
    ContainerId containerId = ContainerId.fromString(containerIdStr);
    MRAppMaster appMaster = new MRAppMasterTest(applicationAttemptId, containerId, "host", -1, -1, System.currentTimeMillis(), false, false);
    boolean caught = false;
    try {
        MRAppMaster.initAndStartAppMaster(appMaster, conf, userName);
    } catch (IOException e) {
        //The IO Exception is expected
        LOG.info("Caught expected Exception", e);
        caught = true;
    }
    assertTrue(caught);
    assertTrue(appMaster.errorHappenedShutDown);
    assertEquals(JobStateInternal.FAILED, appMaster.forcedState);
    appMaster.stop();
    // verify the final status is FAILED
    verifyFailedStatus((MRAppMasterTest) appMaster, "FAILED");
}