Package org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica

Examples of org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp

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    final String user_0 = "user_0";

    // Submit applications
    final ApplicationAttemptId appAttemptId_0 = TestUtils
        .getMockApplicationAttemptId(0, 1);
    FiCaSchedulerApp app_0 = new FiCaSchedulerApp(appAttemptId_0, user_0, a, null,
        rmContext, null);
    a.submitApplication(app_0, user_0, B);
   
    when(cs.getApplication(appAttemptId_0)).thenReturn(app_0);
    AppRemovedSchedulerEvent event = new AppRemovedSchedulerEvent(
        appAttemptId_0, RMAppAttemptState.FAILED);
    cs.handle(event);
   
    assertEquals(0, a.getMetrics().getAppsPending());
    assertEquals(1, a.getMetrics().getAppsFailed());

    // Attempt the same application again
    final ApplicationAttemptId appAttemptId_1 = TestUtils
        .getMockApplicationAttemptId(0, 2);
    FiCaSchedulerApp app_1 = new FiCaSchedulerApp(appAttemptId_1, user_0, a, null,
        rmContext, null);
    a.submitApplication(app_1, user_0, B); // same user

    assertEquals(1, a.getMetrics().getAppsSubmitted());
    assertEquals(1, a.getMetrics().getAppsPending());
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    final String user_0 = "user_0";

    // Submit applications
    final ApplicationAttemptId appAttemptId_0 =
        TestUtils.getMockApplicationAttemptId(0, 0);
    FiCaSchedulerApp app_0 =
        new FiCaSchedulerApp(appAttemptId_0, user_0, a,
            mock(ActiveUsersManager.class), rmContext, null);
    a.submitApplication(app_0, user_0, A);

    final ApplicationAttemptId appAttemptId_1 =
        TestUtils.getMockApplicationAttemptId(1, 0);
    FiCaSchedulerApp app_1 =
        new FiCaSchedulerApp(appAttemptId_1, user_0, a,
            mock(ActiveUsersManager.class), rmContext, null);
    a.submitApplication(app_1, user_0, A);  // same user

   
    // Setup some nodes
    String host_0 = "host_0";
    FiCaSchedulerNode node_0 = TestUtils.getMockNode(host_0, DEFAULT_RACK, 0, 8*GB);
   
    final int numNodes = 1;
    Resource clusterResource = Resources.createResource(numNodes * (8*GB));
    when(csContext.getNumClusterNodes()).thenReturn(numNodes);

    // Setup resource-requests
    Priority priority = TestUtils.createMockPriority(1);
    app_0.updateResourceRequests(Collections.singletonList(
            TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 3, priority,
                recordFactory)));

    app_1.updateResourceRequests(Collections.singletonList(
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 2, priority,
            recordFactory)));

    // Start testing...
   
    // Only 1 container
    a.assignContainers(clusterResource, node_0);
    assertEquals(1*GB, a.getUsedResources().getMemory());
    assertEquals(1*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(1*GB, a.getMetrics().getAllocatedMB());
    assertEquals(0*GB, a.getMetrics().getAvailableMB());

    // Also 2nd -> minCapacity = 1024 since (.1 * 8G) < minAlloc, also
    // you can get one container more than user-limit
    a.assignContainers(clusterResource, node_0);
    assertEquals(2*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(2*GB, a.getMetrics().getAllocatedMB());
   
    // Can't allocate 3rd due to user-limit
    a.assignContainers(clusterResource, node_0);
    assertEquals(2*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(2*GB, a.getMetrics().getAllocatedMB());
   
    // Bump up user-limit-factor, now allocate should work
    a.setUserLimitFactor(10);
    a.assignContainers(clusterResource, node_0);
    assertEquals(3*GB, a.getUsedResources().getMemory());
    assertEquals(3*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(3*GB, a.getMetrics().getAllocatedMB());

    // One more should work, for app_1, due to user-limit-factor
    a.assignContainers(clusterResource, node_0);
    assertEquals(4*GB, a.getUsedResources().getMemory());
    assertEquals(3*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(1*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(4*GB, a.getMetrics().getAllocatedMB());

    // Test max-capacity
    // Now - no more allocs since we are at max-cap
    a.setMaxCapacity(0.5f);
    a.assignContainers(clusterResource, node_0);
    assertEquals(4*GB, a.getUsedResources().getMemory());
    assertEquals(3*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(1*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(4*GB, a.getMetrics().getAllocatedMB());
   
    // Release each container from app_0
    for (RMContainer rmContainer : app_0.getLiveContainers()) {
      a.completedContainer(clusterResource, app_0, node_0, rmContainer,
          null, RMContainerEventType.KILL);
    }
    assertEquals(1*GB, a.getUsedResources().getMemory());
    assertEquals(0*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(1*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(1*GB, a.getMetrics().getAllocatedMB());
   
    // Release each container from app_1
    for (RMContainer rmContainer : app_1.getLiveContainers()) {
      a.completedContainer(clusterResource, app_1, node_0, rmContainer,
          null, RMContainerEventType.KILL);
    }
    assertEquals(0*GB, a.getUsedResources().getMemory());
    assertEquals(0*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(0*GB, a.getMetrics().getAllocatedMB());
    assertEquals(1*GB, a.getMetrics().getAvailableMB());
  }
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    final String user_1 = "user_1";

    // Submit applications
    final ApplicationAttemptId appAttemptId_0 =
        TestUtils.getMockApplicationAttemptId(0, 0);
    FiCaSchedulerApp app_0 =
        new FiCaSchedulerApp(appAttemptId_0, user_0, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_0, user_0, A);

    final ApplicationAttemptId appAttemptId_1 =
        TestUtils.getMockApplicationAttemptId(1, 0);
    FiCaSchedulerApp app_1 =
        new FiCaSchedulerApp(appAttemptId_1, user_0, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_1, user_0, A);  // same user

    final ApplicationAttemptId appAttemptId_2 =
        TestUtils.getMockApplicationAttemptId(2, 0);
    FiCaSchedulerApp app_2 =
        new FiCaSchedulerApp(appAttemptId_2, user_1, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_2, user_1, A);

    // Setup some nodes
    String host_0 = "host_0";
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    final String user_1 = "user_1";

    // Submit applications
    final ApplicationAttemptId appAttemptId_0 =
        TestUtils.getMockApplicationAttemptId(0, 0);
    FiCaSchedulerApp app_0 =
        new FiCaSchedulerApp(appAttemptId_0, user_0, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_0, user_0, A);

    final ApplicationAttemptId appAttemptId_1 =
        TestUtils.getMockApplicationAttemptId(1, 0);
    FiCaSchedulerApp app_1 =
        new FiCaSchedulerApp(appAttemptId_1, user_0, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_1, user_0, A);  // same user

    final ApplicationAttemptId appAttemptId_2 =
        TestUtils.getMockApplicationAttemptId(2, 0);
    FiCaSchedulerApp app_2 =
        new FiCaSchedulerApp(appAttemptId_2, user_1, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_2, user_1, A);

    // Setup some nodes
    String host_0 = "host_0";
    FiCaSchedulerNode node_0 = TestUtils.getMockNode(host_0, DEFAULT_RACK, 0, 8*GB);
    String host_1 = "host_1";
    FiCaSchedulerNode node_1 = TestUtils.getMockNode(host_1, DEFAULT_RACK, 0, 8*GB);
   
    final int numNodes = 2;
    Resource clusterResource = Resources.createResource(numNodes * (8*GB));
    when(csContext.getNumClusterNodes()).thenReturn(numNodes);
    // Setup resource-requests
    Priority priority = TestUtils.createMockPriority(1);
    app_0.updateResourceRequests(Collections.singletonList(
            TestUtils.createResourceRequest(RMNodeImpl.ANY, 2*GB, 1, priority,
                recordFactory)));

    app_1.updateResourceRequests(Collections.singletonList(
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 2, priority,
            recordFactory)));

    /**
     * Start testing...
     */
   
    // Set user-limit
    a.setUserLimit(50);
    a.setUserLimitFactor(2);
   
    // Now, only user_0 should be active since he is the only one with
    // outstanding requests
    assertEquals("There should only be 1 active user!",
        1, a.getActiveUsersManager().getNumActiveUsers());

    // 1 container to user_0
    a.assignContainers(clusterResource, node_0);
    assertEquals(2*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_0.getHeadroom().getMemory()); // User limit = 2G
    assertEquals(0*GB, app_0.getHeadroom().getMemory()); // User limit = 2G

    // Again one to user_0 since he hasn't exceeded user limit yet
    a.assignContainers(clusterResource, node_0);
    assertEquals(3*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(1*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_0.getHeadroom().getMemory()); // 3G - 2G
    assertEquals(0*GB, app_0.getHeadroom().getMemory()); // 3G - 2G
   
    // Submit requests for app_1 and set max-cap
    a.setMaxCapacity(.1f);
    app_2.updateResourceRequests(Collections.singletonList(
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 1, priority,
            recordFactory)));
    assertEquals(2, a.getActiveUsersManager().getNumActiveUsers());

    // No more to user_0 since he is already over user-limit
    // and no more containers to queue since it's already at max-cap
    a.assignContainers(clusterResource, node_1);
    assertEquals(3*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(1*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_0.getHeadroom().getMemory());
    assertEquals(0*GB, app_1.getHeadroom().getMemory());
   
    // Check headroom for app_2
    LOG.info("here");
    app_1.updateResourceRequests(Collections.singletonList(     // unset
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 0, priority,
            recordFactory)));
    assertEquals(1, a.getActiveUsersManager().getNumActiveUsers());
    a.assignContainers(clusterResource, node_1);
    assertEquals(1*GB, app_2.getHeadroom().getMemory());   // hit queue max-cap
  }
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    final String user_2 = "user_2";

    // Submit applications
    final ApplicationAttemptId appAttemptId_0 =
        TestUtils.getMockApplicationAttemptId(0, 0);
    FiCaSchedulerApp app_0 =
        new FiCaSchedulerApp(appAttemptId_0, user_0, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_0, user_0, A);

    final ApplicationAttemptId appAttemptId_1 =
        TestUtils.getMockApplicationAttemptId(1, 0);
    FiCaSchedulerApp app_1 =
        new FiCaSchedulerApp(appAttemptId_1, user_0, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_1, user_0, A);  // same user

    final ApplicationAttemptId appAttemptId_2 =
        TestUtils.getMockApplicationAttemptId(2, 0);
    FiCaSchedulerApp app_2 =
        new FiCaSchedulerApp(appAttemptId_2, user_1, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_2, user_1, A);

    final ApplicationAttemptId appAttemptId_3 =
        TestUtils.getMockApplicationAttemptId(3, 0);
    FiCaSchedulerApp app_3 =
        new FiCaSchedulerApp(appAttemptId_3, user_2, a,
            a.getActiveUsersManager(), rmContext, null);
    a.submitApplication(app_3, user_2, A);
   
    // Setup some nodes
    String host_0 = "host_0";
    FiCaSchedulerNode node_0 = TestUtils.getMockNode(host_0, DEFAULT_RACK, 0, 8*GB);
   
    final int numNodes = 1;
    Resource clusterResource = Resources.createResource(numNodes * (8*GB));
    when(csContext.getNumClusterNodes()).thenReturn(numNodes);
   
    // Setup resource-requests
    Priority priority = TestUtils.createMockPriority(1);
    app_0.updateResourceRequests(Collections.singletonList(
            TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 10, priority,
                recordFactory)));

    app_1.updateResourceRequests(Collections.singletonList(
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 10, priority,
            recordFactory)));

    /**
     * Start testing...
     */
   
    // Only 1 container
    a.assignContainers(clusterResource, node_0);
    assertEquals(1*GB, a.getUsedResources().getMemory());
    assertEquals(1*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());

    // Also 2nd -> minCapacity = 1024 since (.1 * 8G) < minAlloc, also
    // you can get one container more than user-limit
    a.assignContainers(clusterResource, node_0);
    assertEquals(2*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
   
    // Can't allocate 3rd due to user-limit
    a.setUserLimit(25);
    a.assignContainers(clusterResource, node_0);
    assertEquals(2*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
   
    // Submit resource requests for other apps now to 'activate' them
   
    app_2.updateResourceRequests(Collections.singletonList(
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 3*GB, 1, priority,
            recordFactory)));

    app_3.updateResourceRequests(Collections.singletonList(
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 2, priority,
            recordFactory)));

    // Now allocations should goto app_2 since
    // user_0 is at limit inspite of high user-limit-factor
    a.setUserLimitFactor(10);
    a.assignContainers(clusterResource, node_0);
    assertEquals(5*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(3*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_3.getCurrentConsumption().getMemory());

    // Now allocations should goto app_0 since
    // user_0 is at user-limit not above it
    a.assignContainers(clusterResource, node_0);
    assertEquals(6*GB, a.getUsedResources().getMemory());
    assertEquals(3*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(3*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_3.getCurrentConsumption().getMemory());
   
    // Test max-capacity
    // Now - no more allocs since we are at max-cap
    a.setMaxCapacity(0.5f);
    a.assignContainers(clusterResource, node_0);
    assertEquals(6*GB, a.getUsedResources().getMemory());
    assertEquals(3*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(3*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_3.getCurrentConsumption().getMemory());
   
    // Revert max-capacity and user-limit-factor
    // Now, allocations should goto app_3 since it's under user-limit
    a.setMaxCapacity(1.0f);
    a.setUserLimitFactor(1);
    a.assignContainers(clusterResource, node_0);
    assertEquals(7*GB, a.getUsedResources().getMemory());
    assertEquals(3*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(3*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(1*GB, app_3.getCurrentConsumption().getMemory());

    // Now we should assign to app_3 again since user_2 is under user-limit
    a.assignContainers(clusterResource, node_0);
    assertEquals(8*GB, a.getUsedResources().getMemory());
    assertEquals(3*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(3*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(2*GB, app_3.getCurrentConsumption().getMemory());

    // 8. Release each container from app_0
    for (RMContainer rmContainer : app_0.getLiveContainers()) {
      a.completedContainer(clusterResource, app_0, node_0, rmContainer,
          null, RMContainerEventType.KILL);
    }
    assertEquals(5*GB, a.getUsedResources().getMemory());
    assertEquals(0*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(3*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(2*GB, app_3.getCurrentConsumption().getMemory());
   
    // 9. Release each container from app_2
    for (RMContainer rmContainer : app_2.getLiveContainers()) {
      a.completedContainer(clusterResource, app_2, node_0, rmContainer,
          null, RMContainerEventType.KILL);
    }
    assertEquals(2*GB, a.getUsedResources().getMemory());
    assertEquals(0*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(2*GB, app_3.getCurrentConsumption().getMemory());

    // 10. Release each container from app_3
    for (RMContainer rmContainer : app_3.getLiveContainers()) {
      a.completedContainer(clusterResource, app_3, node_0, rmContainer,
          null, RMContainerEventType.KILL);
    }
    assertEquals(0*GB, a.getUsedResources().getMemory());
    assertEquals(0*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_2.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_3.getCurrentConsumption().getMemory());
  }
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    final String user_1 = "user_1";

    // Submit applications
    final ApplicationAttemptId appAttemptId_0 =
        TestUtils.getMockApplicationAttemptId(0, 0);
    FiCaSchedulerApp app_0 =
        new FiCaSchedulerApp(appAttemptId_0, user_0, a,
            mock(ActiveUsersManager.class), rmContext, null);
    a.submitApplication(app_0, user_0, A);

    final ApplicationAttemptId appAttemptId_1 =
        TestUtils.getMockApplicationAttemptId(1, 0);
    FiCaSchedulerApp app_1 =
        new FiCaSchedulerApp(appAttemptId_1, user_1, a,
            mock(ActiveUsersManager.class), rmContext, null);
    a.submitApplication(app_1, user_1, A); 

    // Setup some nodes
    String host_0 = "host_0";
    FiCaSchedulerNode node_0 = TestUtils.getMockNode(host_0, DEFAULT_RACK, 0, 4*GB);
   
    final int numNodes = 2;
    Resource clusterResource = Resources.createResource(numNodes * (4*GB));
    when(csContext.getNumClusterNodes()).thenReturn(numNodes);
   
    // Setup resource-requests
    Priority priority = TestUtils.createMockPriority(1);
    app_0.updateResourceRequests(Collections.singletonList(
            TestUtils.createResourceRequest(RMNodeImpl.ANY, 1*GB, 2, priority,
                recordFactory)));

    app_1.updateResourceRequests(Collections.singletonList(
        TestUtils.createResourceRequest(RMNodeImpl.ANY, 4*GB, 1, priority,
            recordFactory)));

    // Start testing...
   
    // Only 1 container
    a.assignContainers(clusterResource, node_0);
    assertEquals(1*GB, a.getUsedResources().getMemory());
    assertEquals(1*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(1*GB, a.getMetrics().getAllocatedMB());
    assertEquals(0*GB, a.getMetrics().getAvailableMB());

    // Also 2nd -> minCapacity = 1024 since (.1 * 8G) < minAlloc, also
    // you can get one container more than user-limit
    a.assignContainers(clusterResource, node_0);
    assertEquals(2*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(2*GB, a.getMetrics().getAllocatedMB());
   
    // Now, reservation should kick in for app_1
    a.assignContainers(clusterResource, node_0);
    assertEquals(6*GB, a.getUsedResources().getMemory());
    assertEquals(2*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(4*GB, app_1.getCurrentReservation().getMemory());
    assertEquals(2*GB, node_0.getUsedResource().getMemory());
    assertEquals(4*GB, a.getMetrics().getReservedMB());
    assertEquals(2*GB, a.getMetrics().getAllocatedMB());
   
    // Now free 1 container from app_0 i.e. 1G
    a.completedContainer(clusterResource, app_0, node_0,
        app_0.getLiveContainers().iterator().next(), null, RMContainerEventType.KILL);
    a.assignContainers(clusterResource, node_0);
    assertEquals(5*GB, a.getUsedResources().getMemory());
    assertEquals(1*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(4*GB, app_1.getCurrentReservation().getMemory());
    assertEquals(1*GB, node_0.getUsedResource().getMemory());
    assertEquals(4*GB, a.getMetrics().getReservedMB());
    assertEquals(1*GB, a.getMetrics().getAllocatedMB());

    // Now finish another container from app_0 and fulfill the reservation
    a.completedContainer(clusterResource, app_0, node_0,
        app_0.getLiveContainers().iterator().next(), null, RMContainerEventType.KILL);
    a.assignContainers(clusterResource, node_0);
    assertEquals(4*GB, a.getUsedResources().getMemory());
    assertEquals(0*GB, app_0.getCurrentConsumption().getMemory());
    assertEquals(4*GB, app_1.getCurrentConsumption().getMemory());
    assertEquals(0*GB, app_1.getCurrentReservation().getMemory());
    assertEquals(4*GB, node_0.getUsedResource().getMemory());
    assertEquals(0*GB, a.getMetrics().getReservedMB());
    assertEquals(4*GB, a.getMetrics().getAllocatedMB());
  }
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  }

  private synchronized void activateApplications() {
    for (Iterator<FiCaSchedulerApp> i=pendingApplications.iterator();
         i.hasNext(); ) {
      FiCaSchedulerApp application = i.next();
     
      // Check queue limit
      if (getNumActiveApplications() >= getMaximumActiveApplications()) {
        break;
      }
     
      // Check user limit
      User user = getUser(application.getUser());
      if (user.getActiveApplications() < getMaximumActiveApplicationsPerUser()) {
        user.activateApplication();
        activeApplications.add(application);
        i.remove();
        LOG.info("Application " + application.getApplicationId() +
            " from user: " + application.getUser() +
            " activated in queue: " + getQueueName());
      }
    }
  }
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    }
   
    // Check for reserved resources
    RMContainer reservedContainer = node.getReservedContainer();
    if (reservedContainer != null) {
      FiCaSchedulerApp application =
          getApplication(reservedContainer.getApplicationAttemptId());
      return new CSAssignment(
          assignReservedContainer(application, node, reservedContainer,
              clusterResource),
          NodeType.NODE_LOCAL); // Don't care about locality constraints
                                // for reserved containers
    }
   
    // Try to assign containers to applications in order
    for (FiCaSchedulerApp application : activeApplications) {
     
      if(LOG.isDebugEnabled()) {
        LOG.debug("pre-assignContainers for application "
        + application.getApplicationId());
        application.showRequests();
      }

      synchronized (application) {
        // Schedule in priority order
        for (Priority priority : application.getPriorities()) {
          // Required resource
          Resource required =
              application.getResourceRequest(priority, RMNode.ANY).getCapability();

          // Do we need containers at this 'priority'?
          if (!needContainers(application, priority, required)) {
            continue;
          }

          // Compute user-limit & set headroom
          // Note: We compute both user-limit & headroom with the highest
          //       priority request as the target.
          //       This works since we never assign lower priority requests
          //       before all higher priority ones are serviced.
          Resource userLimit =
              computeUserLimitAndSetHeadroom(application, clusterResource,
                  required);         
         
          // Check queue max-capacity limit
          if (!assignToQueue(clusterResource, required)) {
            return NULL_ASSIGNMENT;
          }

          // Check user limit
          if (!assignToUser(application.getUser(), userLimit)) {
            break;
          }

          // Inform the application it is about to get a scheduling opportunity
          application.addSchedulingOpportunity(priority);
         
          // Try to schedule
          CSAssignment assignment = 
            assignContainersOnNode(clusterResource, node, application, priority,
                null);

          // Did we schedule or reserve a container?
          Resource assigned = assignment.getResource();
          if (Resources.greaterThan(assigned, Resources.none())) {

            // Book-keeping
            // Note: Update headroom to account for current allocation too...
            allocateResource(clusterResource, application, assigned);
           
            // Reset scheduling opportunities
            application.resetSchedulingOpportunities(priority);
           
            // Done
            return assignment;
          } else {
            // Do not assign out of order w.r.t priorities
            break;
          }
        }
      }

      if(LOG.isDebugEnabled()) {
        LOG.debug("post-assignContainers for application "
          + application.getApplicationId());
      }
      application.showRequests();
    }
 
    return NULL_ASSIGNMENT;

  }
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    LOG.info("Setup top-level queues a and b");
  }

  private FiCaSchedulerApp getMockApplication(int appId, String user) {
    FiCaSchedulerApp application = mock(FiCaSchedulerApp.class);
    doReturn(user).when(application).getUser();
    doReturn(Resources.createResource(0)).when(application).getHeadroom();
    return application;
  }
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        final Resource allocatedResource = Resources.createResource(allocation);
        if (queue instanceof ParentQueue) {
          ((ParentQueue)queue).allocateResource(clusterResource,
              allocatedResource);
        } else {
          FiCaSchedulerApp app1 = getMockApplication(0, "");
          ((LeafQueue)queue).allocateResource(clusterResource, app1,
              allocatedResource);
        }
       
        // Next call - nothing
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