Examples of RMAppAttempt

org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt
Interface to an Application Attempt in the Resource Manager. A {@link RMApp} can have multiple app attempts based on{@link YarnConfiguration#RM_AM_MAX_ATTEMPTS}. For specific implementation take a look at {@link RMAppAttemptImpl}.

Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    MockNM nm2 = rm.registerNode("127.0.0.2:5678", 4 * GB);


    RMApp app1 = rm.submitApp(2048);
    // kick the scheduling, 2 GB given to AM1, remaining 4GB on nm1
    nm1.nodeHeartbeat(true);
    RMAppAttempt attempt1 = app1.getCurrentAppAttempt();
    MockAM am1 = rm.sendAMLaunched(attempt1.getAppAttemptId());
    am1.registerAppAttempt();
    SchedulerNodeReport report_nm1 = rm.getResourceScheduler().getNodeReport(
        nm1.getNodeId());
    Assert.assertEquals(2 * GB, report_nm1.getUsedResource().getMemory());


    RMApp app2 = rm.submitApp(2048);
    // kick the scheduling, 2GB given to AM, remaining 2 GB on nm2
    nm2.nodeHeartbeat(true);
    RMAppAttempt attempt2 = app2.getCurrentAppAttempt();
    MockAM am2 = rm.sendAMLaunched(attempt2.getAppAttemptId());
    am2.registerAppAttempt();
    SchedulerNodeReport report_nm2 = rm.getResourceScheduler().getNodeReport(
        nm2.getNodeId());
    Assert.assertEquals(2 * GB, report_nm2.getUsedResource().getMemory());

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    // Submit an application
    RMApp app1 = rm.submitApp(testAlloc);


    // kick the scheduling
    nm1.nodeHeartbeat(true);
    RMAppAttempt attempt1 = app1.getCurrentAppAttempt();
    MockAM am1 = rm.sendAMLaunched(attempt1.getAppAttemptId());
    am1.registerAppAttempt();
    SchedulerNodeReport report_nm1 = rm.getResourceScheduler().getNodeReport(
        nm1.getNodeId());


    int checkAlloc =

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

      LOG.info("Waiting for AM Launch to happen..");
      Thread.sleep(1000);
    }
    Assert.assertTrue(containerManager.launched);


    RMAppAttempt attempt = app.getCurrentAppAttempt();
    ApplicationAttemptId appAttemptId = attempt.getAppAttemptId();
    Assert.assertEquals(appAttemptId.toString(),
        containerManager.attemptIdAtContainerManager);
    Assert.assertEquals(app.getSubmitTime(),
        containerManager.submitTimeAtContainerManager);
    Assert.assertEquals(app.getRMAppAttempt(appAttemptId)
        .getMasterContainer().getId()
        .toString(), containerManager.containerIdAtContainerManager);
    Assert.assertEquals(nm1.getNodeId().toString(),
      containerManager.nmHostAtContainerManager);
    Assert.assertEquals(YarnConfiguration.DEFAULT_RM_AM_MAX_ATTEMPTS,
        containerManager.maxAppAttempts);


    MockAM am = new MockAM(rm.getRMContext(), rm
        .getApplicationMasterService(), appAttemptId);
    am.registerAppAttempt();
    am.unregisterAppAttempt();


    //complete the AM container to finish the app normally
    nm1.nodeHeartbeat(attempt.getAppAttemptId(), 1, ContainerState.COMPLETE);
    am.waitForState(RMAppAttemptState.FINISHED);


    waitCount = 0;
    while (containerManager.cleanedup == false && waitCount++ < 20) {
      LOG.info("Waiting for AM Cleanup to happen..");

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    rm.start();
    MockNM nm1 = rm.registerNode("h1:1234", 5000);
    RMApp app = rm.submitApp(2000);
    // kick the scheduling
    nm1.nodeHeartbeat(true);
    RMAppAttempt attempt = app.getCurrentAppAttempt();
    MockAM am = rm.sendAMLaunched(attempt.getAppAttemptId());


    // request for containers
    int request = 2;
    AllocateResponse ar =
        am.allocate("h1", 1000, request, new ArrayList<ContainerId>());
    Assert.assertTrue(ar.getAMCommand() == AMCommand.AM_RESYNC);


    // kick the scheduler
    nm1.nodeHeartbeat(true);
    AllocateResponse amrs =
        am.allocate(new ArrayList<ResourceRequest>(),
          new ArrayList<ContainerId>());
    Assert.assertTrue(ar.getAMCommand() == AMCommand.AM_RESYNC);


    am.registerAppAttempt();
    thrown = false;
    try {
    am.registerAppAttempt(false);
    }
    catch (Exception e) {
      Assert.assertEquals("Application Master is already registered : "
          + attempt.getAppAttemptId().getApplicationId(),
        e.getMessage());
      thrown = true;
    }
    Assert.assertTrue(thrown);


    // Simulate an AM that was disconnected and app attempt was removed
    // (responseMap does not contain attemptid)
    am.unregisterAppAttempt();
    nm1.nodeHeartbeat(attempt.getAppAttemptId(), 1,
        ContainerState.COMPLETE);
    am.waitForState(RMAppAttemptState.FINISHED);


    AllocateResponse amrs2 =
        am.allocate(new ArrayList<ResourceRequest>(),

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    ApplicationAttemptId newAttemptId =
        app1.getCurrentAppAttempt().getAppAttemptId();
    Assert.assertFalse(newAttemptId.equals(am1.getApplicationAttemptId()));


    // launch the new AM
    RMAppAttempt attempt2 = app1.getCurrentAppAttempt();
    nm1.nodeHeartbeat(true);
    MockAM am2 = rm1.sendAMLaunched(attempt2.getAppAttemptId());
    RegisterApplicationMasterResponse registerResponse =
        am2.registerAppAttempt();


    // Assert two containers are running: container2 and container3;
    Assert.assertEquals(2, registerResponse.getContainersFromPreviousAttempts()
      .size());
    boolean containerId2Exists = false, containerId3Exists = false;
    for (Container container : registerResponse
      .getContainersFromPreviousAttempts()) {
      if (container.getId().equals(containerId2)) {
        containerId2Exists = true;
      }
      if (container.getId().equals(containerId3)) {
        containerId3Exists = true;
      }
    }
    Assert.assertTrue(containerId2Exists && containerId3Exists);
    rm1.waitForState(app1.getApplicationId(), RMAppState.RUNNING);


    // complete container by sending the container complete event which has earlier
    // attempt's attemptId
    nm1.nodeHeartbeat(am1.getApplicationAttemptId(), 3, ContainerState.COMPLETE);


    // Even though the completed container containerId3 event was sent to the
    // earlier failed attempt, new RMAppAttempt can also capture this container
    // info.
    // completed containerId4 is also transferred to the new attempt.
    RMAppAttempt newAttempt =
        app1.getRMAppAttempt(am2.getApplicationAttemptId());
    // 4 containers finished, acquired/allocated/reserved/completed.
    waitForContainersToFinish(4, newAttempt);
    boolean container3Exists = false, container4Exists = false, container5Exists =
        false, container6Exists = false;
    for(ContainerStatus status :  newAttempt.getJustFinishedContainers()) {
      if(status.getContainerId().equals(containerId3)) {
        // containerId3 is the container ran by previous attempt but finished by the
        // new attempt.
        container3Exists = true;
      }
      if (status.getContainerId().equals(containerId4)) {
        // containerId4 is the Acquired Container killed by the previous attempt,
        // it's now inside new attempt's finished container list.
        container4Exists = true;
      }
      if (status.getContainerId().equals(containerId5)) {
        // containerId5 is the Allocated container killed by previous failed attempt.
        container5Exists = true;
      }
      if (status.getContainerId().equals(containerId6)) {
        // containerId6 is the reserved container killed by previous failed attempt.
        container6Exists = true;
      }
    }
    Assert.assertTrue(container3Exists && container4Exists && container5Exists
        && container6Exists);


    // New SchedulerApplicationAttempt also has the containers info.
    rm1.waitForState(nm1, containerId2, RMContainerState.RUNNING);


    // record the scheduler attempt for testing.
    SchedulerApplicationAttempt schedulerNewAttempt =
        ((AbstractYarnScheduler) rm1.getResourceScheduler())
          .getCurrentAttemptForContainer(containerId2);
    // finish this application
    MockRM.finishAMAndVerifyAppState(app1, rm1, nm1, am2);


    // the 2nd attempt released the 1st attempt's running container, when the
    // 2nd attempt finishes.
    Assert.assertFalse(schedulerNewAttempt.getLiveContainers().contains(
      containerId2));
    // all 4 normal containers finished.
    System.out.println("New attempt's just finished containers: "
        + newAttempt.getJustFinishedContainers());
    waitForContainersToFinish(5, newAttempt);
    rm1.stop();
  }

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    rm1.start();
    MockNM nm1 =
        new MockNM("127.0.0.1:1234", 8000, rm1.getResourceTrackerService());
    nm1.registerNode();
    RMApp app1 = rm1.submitApp(200);
    RMAppAttempt attempt1 = app1.getCurrentAppAttempt();
    MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
    CapacityScheduler scheduler =
        (CapacityScheduler) rm1.getResourceScheduler();
    ContainerId amContainer =
        ContainerId.newInstance(am1.getApplicationAttemptId(), 1);
    // Preempt the first attempt;
    scheduler.killContainer(scheduler.getRMContainer(amContainer));


    am1.waitForState(RMAppAttemptState.FAILED);
    Assert.assertTrue(! attempt1.shouldCountTowardsMaxAttemptRetry());
    rm1.waitForState(app1.getApplicationId(), RMAppState.ACCEPTED);
    ApplicationState appState =
        memStore.getState().getApplicationState().get(app1.getApplicationId());
    // AM should be restarted even though max-am-attempt is 1.
    MockAM am2 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
    RMAppAttempt attempt2 = app1.getCurrentAppAttempt();
    Assert.assertTrue(((RMAppAttemptImpl) attempt2).mayBeLastAttempt());


    // Preempt the second attempt.
    ContainerId amContainer2 =
        ContainerId.newInstance(am2.getApplicationAttemptId(), 1);
    scheduler.killContainer(scheduler.getRMContainer(amContainer2));


    am2.waitForState(RMAppAttemptState.FAILED);
    Assert.assertTrue(! attempt2.shouldCountTowardsMaxAttemptRetry());
    rm1.waitForState(app1.getApplicationId(), RMAppState.ACCEPTED);
    MockAM am3 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
    RMAppAttempt attempt3 = app1.getCurrentAppAttempt();
    Assert.assertTrue(((RMAppAttemptImpl) attempt3).mayBeLastAttempt());


    // mimic NM disk_failure
    ContainerStatus containerStatus = Records.newRecord(ContainerStatus.class);
    containerStatus.setContainerId(attempt3.getMasterContainer().getId());
    containerStatus.setDiagnostics("mimic NM disk_failure");
    containerStatus.setState(ContainerState.COMPLETE);
    containerStatus.setExitStatus(ContainerExitStatus.DISKS_FAILED);
    Map<ApplicationId, List<ContainerStatus>> conts =
        new HashMap<ApplicationId, List<ContainerStatus>>();
    conts.put(app1.getApplicationId(),
      Collections.singletonList(containerStatus));
    nm1.nodeHeartbeat(conts, true);


    am3.waitForState(RMAppAttemptState.FAILED);
    Assert.assertTrue(! attempt3.shouldCountTowardsMaxAttemptRetry());
    Assert.assertEquals(ContainerExitStatus.DISKS_FAILED,
      appState.getAttempt(am3.getApplicationAttemptId())
        .getAMContainerExitStatus());


    rm1.waitForState(app1.getApplicationId(), RMAppState.ACCEPTED);
    MockAM am4 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
    RMAppAttempt attempt4 = app1.getCurrentAppAttempt();
    Assert.assertTrue(((RMAppAttemptImpl) attempt4).mayBeLastAttempt());


    // create second NM, and register to rm1
    MockNM nm2 =
        new MockNM("127.0.0.1:2234", 8000, rm1.getResourceTrackerService());
    nm2.registerNode();
    // nm1 heartbeats to report unhealthy
    // This will mimic ContainerExitStatus.ABORT
    nm1.nodeHeartbeat(false);
    am4.waitForState(RMAppAttemptState.FAILED);
    Assert.assertTrue(! attempt4.shouldCountTowardsMaxAttemptRetry());
    Assert.assertEquals(ContainerExitStatus.ABORTED,
      appState.getAttempt(am4.getApplicationAttemptId())
        .getAMContainerExitStatus());
    // launch next AM in nm2
    nm2.nodeHeartbeat(true);
    MockAM am5 =
        rm1.waitForNewAMToLaunchAndRegister(app1.getApplicationId(), 5, nm2);
    RMAppAttempt attempt5 = app1.getCurrentAppAttempt();
    Assert.assertTrue(((RMAppAttemptImpl) attempt5).mayBeLastAttempt());
    // fail the AM normally
    nm2
      .nodeHeartbeat(am5.getApplicationAttemptId(), 1, ContainerState.COMPLETE);
    am5.waitForState(RMAppAttemptState.FAILED);
    Assert.assertTrue(attempt5.shouldCountTowardsMaxAttemptRetry());


    // AM should not be restarted.
    rm1.waitForState(app1.getApplicationId(), RMAppState.FAILED);
    Assert.assertEquals(5, app1.getAppAttempts().size());
    rm1.stop();

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    rm1.start();
    MockNM nm1 =
        new MockNM("127.0.0.1:1234", 8000, rm1.getResourceTrackerService());
    nm1.registerNode();
    RMApp app1 = rm1.submitApp(200);
    RMAppAttempt attempt1 = app1.getCurrentAppAttempt();
    MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
    CapacityScheduler scheduler =
        (CapacityScheduler) rm1.getResourceScheduler();
    ContainerId amContainer =
        ContainerId.newInstance(am1.getApplicationAttemptId(), 1);


    // Forcibly preempt the am container;
    scheduler.killContainer(scheduler.getRMContainer(amContainer));


    am1.waitForState(RMAppAttemptState.FAILED);
    Assert.assertTrue(! attempt1.shouldCountTowardsMaxAttemptRetry());
    rm1.waitForState(app1.getApplicationId(), RMAppState.ACCEPTED);


    // state store has 1 attempt stored.
    ApplicationState appState =
        memStore.getState().getApplicationState().get(app1.getApplicationId());
    Assert.assertEquals(1, appState.getAttemptCount());
    // attempt stored has the preempted container exit status.
    Assert.assertEquals(ContainerExitStatus.PREEMPTED,
      appState.getAttempt(am1.getApplicationAttemptId())
        .getAMContainerExitStatus());
    // Restart rm.
    MockRM rm2 = new MockRM(conf, memStore);
    nm1.setResourceTrackerService(rm2.getResourceTrackerService());
    nm1.registerNode();
    rm2.start();


    // Restarted RM should re-launch the am.
    MockAM am2 =
        rm2.waitForNewAMToLaunchAndRegister(app1.getApplicationId(), 2, nm1);
    MockRM.finishAMAndVerifyAppState(app1, rm2, nm1, am2);
    RMAppAttempt attempt2 =
        rm2.getRMContext().getRMApps().get(app1.getApplicationId())
          .getCurrentAppAttempt();
    Assert.assertTrue(attempt2.shouldCountTowardsMaxAttemptRetry());
    Assert.assertEquals(ContainerExitStatus.INVALID,
      appState.getAttempt(am2.getApplicationAttemptId())
        .getAMContainerExitStatus());
    rm1.stop();
    rm2.stop();

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

        new MockNM("127.0.0.1:1234", 8000, rm1.getResourceTrackerService());
    nm1.registerNode();
    RMApp app1 = rm1.submitApp(200);
    // AM should be restarted even though max-am-attempt is 1.
    MockAM am1 = MockRM.launchAndRegisterAM(app1, rm1, nm1);
    RMAppAttempt attempt1 = app1.getCurrentAppAttempt();
    Assert.assertTrue(((RMAppAttemptImpl) attempt1).mayBeLastAttempt());


    // Restart rm.
    MockRM rm2 = new MockRM(conf, memStore);
    rm2.start();
    ApplicationState appState =
        memStore.getState().getApplicationState().get(app1.getApplicationId());
    // re-register the NM
    nm1.setResourceTrackerService(rm2.getResourceTrackerService());
    NMContainerStatus status = Records.newRecord(NMContainerStatus.class);
    status
      .setContainerExitStatus(ContainerExitStatus.KILLED_BY_RESOURCEMANAGER);
    status.setContainerId(attempt1.getMasterContainer().getId());
    status.setContainerState(ContainerState.COMPLETE);
    status.setDiagnostics("");
    nm1.registerNode(Collections.singletonList(status), null);


    rm2.waitForState(attempt1.getAppAttemptId(), RMAppAttemptState.FAILED);
    Assert.assertEquals(ContainerExitStatus.KILLED_BY_RESOURCEMANAGER,
      appState.getAttempt(am1.getApplicationAttemptId())
        .getAMContainerExitStatus());
    // Will automatically start a new AppAttempt in rm2
    rm2.waitForState(app1.getApplicationId(), RMAppState.ACCEPTED);
    MockAM am2 =
        rm2.waitForNewAMToLaunchAndRegister(app1.getApplicationId(), 2, nm1);
    MockRM.finishAMAndVerifyAppState(app1, rm2, nm1, am2);
    RMAppAttempt attempt3 =
        rm2.getRMContext().getRMApps().get(app1.getApplicationId())
          .getCurrentAppAttempt();
    Assert.assertTrue(attempt3.shouldCountTowardsMaxAttemptRetry());
    Assert.assertEquals(ContainerExitStatus.INVALID,
      appState.getAttempt(am2.getApplicationAttemptId())
        .getAMContainerExitStatus());


    rm1.stop();

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    RMApp app = rm.submitApp(2000);


    // Trigger the scheduling so the AM gets 'launched'
    nm1.nodeHeartbeat(true);


    RMAppAttempt attempt = app.getCurrentAppAttempt();
    MockAM am = rm.sendAMLaunched(attempt.getAppAttemptId());


    am.registerAppAttempt();
    
    AllocateRequest allocateRequest =
        AllocateRequest.newInstance(0, 0F, null, null, null);


    AllocateResponse response =
        allocate(attempt.getAppAttemptId(), allocateRequest);
    Assert.assertEquals(1, response.getResponseId());
    Assert.assertTrue(response.getAMCommand() == null);
    allocateRequest =
        AllocateRequest.newInstance(response.getResponseId(), 0F, null, null,
          null);
    
    response = allocate(attempt.getAppAttemptId(), allocateRequest);
    Assert.assertEquals(2, response.getResponseId());
    /* try resending */
    response = allocate(attempt.getAppAttemptId(), allocateRequest);
    Assert.assertEquals(2, response.getResponseId());
    
    /** try sending old request again **/
    allocateRequest = AllocateRequest.newInstance(0, 0F, null, null, null);
    response = allocate(attempt.getAppAttemptId(), allocateRequest);
    Assert.assertTrue(response.getAMCommand() == AMCommand.AM_RESYNC);
  }

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Examples of org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt

    RMApp app1 = rm.submitApp(2000);


    // Trigger the scheduling so the AM gets 'launched' on nm1
    nm1.nodeHeartbeat(true);


    RMAppAttempt attempt1 = app1.getCurrentAppAttempt();
    MockAM am1 = rm.sendAMLaunched(attempt1.getAppAttemptId());
    
    // register AM returns no unusable node
    am1.registerAppAttempt();


    // allocate request returns no updated node
    AllocateRequest allocateRequest1 =
        AllocateRequest.newInstance(0, 0F, null, null, null);
    AllocateResponse response1 =
        allocate(attempt1.getAppAttemptId(), allocateRequest1);
    List<NodeReport> updatedNodes = response1.getUpdatedNodes();
    Assert.assertEquals(0, updatedNodes.size());


    syncNodeHeartbeat(nm4, false);
    
    // allocate request returns updated node
    allocateRequest1 =
        AllocateRequest.newInstance(response1.getResponseId(), 0F, null, null,
          null);
    response1 = allocate(attempt1.getAppAttemptId(), allocateRequest1);
    updatedNodes = response1.getUpdatedNodes();
    Assert.assertEquals(1, updatedNodes.size());
    NodeReport nr = updatedNodes.iterator().next();
    Assert.assertEquals(nm4.getNodeId(), nr.getNodeId());
    Assert.assertEquals(NodeState.UNHEALTHY, nr.getNodeState());
    
    // resending the allocate request returns the same result
    response1 = allocate(attempt1.getAppAttemptId(), allocateRequest1);
    updatedNodes = response1.getUpdatedNodes();
    Assert.assertEquals(1, updatedNodes.size());
    nr = updatedNodes.iterator().next();
    Assert.assertEquals(nm4.getNodeId(), nr.getNodeId());
    Assert.assertEquals(NodeState.UNHEALTHY, nr.getNodeState());


    syncNodeLost(nm3);
    
    // subsequent allocate request returns delta
    allocateRequest1 =
        AllocateRequest.newInstance(response1.getResponseId(), 0F, null, null,
          null);
    response1 = allocate(attempt1.getAppAttemptId(), allocateRequest1);
    updatedNodes = response1.getUpdatedNodes();
    Assert.assertEquals(1, updatedNodes.size());
    nr = updatedNodes.iterator().next();
    Assert.assertEquals(nm3.getNodeId(), nr.getNodeId());
    Assert.assertEquals(NodeState.LOST, nr.getNodeState());
        
    // registering another AM gives it the complete failed list
    RMApp app2 = rm.submitApp(2000);
    // Trigger nm2 heartbeat so that AM gets launched on it
    nm2.nodeHeartbeat(true);
    RMAppAttempt attempt2 = app2.getCurrentAppAttempt();
    MockAM am2 = rm.sendAMLaunched(attempt2.getAppAttemptId());
    
    // register AM returns all unusable nodes
    am2.registerAppAttempt();
    
    // allocate request returns no updated node
    AllocateRequest allocateRequest2 =
        AllocateRequest.newInstance(0, 0F, null, null, null);
    AllocateResponse response2 =
        allocate(attempt2.getAppAttemptId(), allocateRequest2);
    updatedNodes = response2.getUpdatedNodes();
    Assert.assertEquals(0, updatedNodes.size());
    
    syncNodeHeartbeat(nm4, true);
    
    // both AM's should get delta updated nodes
    allocateRequest1 =
        AllocateRequest.newInstance(response1.getResponseId(), 0F, null, null,
          null);
    response1 = allocate(attempt1.getAppAttemptId(), allocateRequest1);
    updatedNodes = response1.getUpdatedNodes();
    Assert.assertEquals(1, updatedNodes.size());
    nr = updatedNodes.iterator().next();
    Assert.assertEquals(nm4.getNodeId(), nr.getNodeId());
    Assert.assertEquals(NodeState.RUNNING, nr.getNodeState());
    
    allocateRequest2 =
        AllocateRequest.newInstance(response2.getResponseId(), 0F, null, null,
          null);
    response2 = allocate(attempt2.getAppAttemptId(), allocateRequest2);
    updatedNodes = response2.getUpdatedNodes();
    Assert.assertEquals(1, updatedNodes.size());
    nr = updatedNodes.iterator().next();
    Assert.assertEquals(nm4.getNodeId(), nr.getNodeId());
    Assert.assertEquals(NodeState.RUNNING, nr.getNodeState());


    // subsequent allocate calls should return no updated nodes
    allocateRequest2 =
        AllocateRequest.newInstance(response2.getResponseId(), 0F, null, null,
          null);
    response2 = allocate(attempt2.getAppAttemptId(), allocateRequest2);
    updatedNodes = response2.getUpdatedNodes();
    Assert.assertEquals(0, updatedNodes.size());
    
    // how to do the above for LOST node

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