YARN-2399. FairScheduler: Merge AppSchedulable and FSSchedulerApp into FSAppAttempt. (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617600 13f79535-47bb-0310-9956-ffa450edef68

hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/scheduler/FairSchedulerMetrics.java

@@ -22,10 +22,9 @@ import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair
-        .AppSchedulable;
+    .FSAppAttempt;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSQueue;
-import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair
-        .FairScheduler;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
 
 import com.codahale.metrics.Gauge;
 import org.apache.hadoop.yarn.sls.SLSRunner;
@@ -66,8 +65,7 @@ public class FairSchedulerMetrics extends SchedulerMetrics {
   public void trackApp(ApplicationAttemptId appAttemptId, String oldAppId) {
     super.trackApp(appAttemptId, oldAppId);
     FairScheduler fair = (FairScheduler) scheduler;
-    final AppSchedulable app = fair.getSchedulerApp(appAttemptId)
-            .getAppSchedulable();
+    final FSAppAttempt app = fair.getSchedulerApp(appAttemptId);
     metrics.register("variable.app." + oldAppId + ".demand.memory",
       new Gauge<Integer>() {
         @Override

hadoop-yarn-project/CHANGES.txt

@@ -122,6 +122,9 @@ Release 2.6.0 - UNRELEASED
     YARN-2317. Updated the document about how to write YARN applications. (Li Lu via
     zjshen)
 
+    YARN-2399. FairScheduler: Merge AppSchedulable and FSSchedulerApp into 
+    FSAppAttempt. (kasha)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSAppAttempt.java

@@ -0,0 +1,768 @@
+/**
+ * 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
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair;
+
+import java.io.Serializable;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
+import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
+import org.apache.hadoop.yarn.api.records.Container;
+import org.apache.hadoop.yarn.api.records.ContainerId;
+import org.apache.hadoop.yarn.api.records.ContainerStatus;
+import org.apache.hadoop.yarn.api.records.NodeId;
+import org.apache.hadoop.yarn.api.records.Priority;
+import org.apache.hadoop.yarn.api.records.Resource;
+import org.apache.hadoop.yarn.api.records.ResourceRequest;
+import org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger;
+import org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger.AuditConstants;
+import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
+import org.apache.hadoop.yarn.server.resourcemanager.resource.ResourceWeights;
+import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer;
+import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerEvent;
+import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerEventType;
+import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerFinishedEvent;
+import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerImpl;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ActiveUsersManager;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.QueueMetrics;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApplicationAttempt;
+import org.apache.hadoop.yarn.server.utils.BuilderUtils;
+import org.apache.hadoop.yarn.util.resource.DefaultResourceCalculator;
+import org.apache.hadoop.yarn.util.resource.Resources;
+
+/**
+ * Represents an application attempt from the viewpoint of the Fair Scheduler.
+ */
+@Private
+@Unstable
+public class FSAppAttempt extends SchedulerApplicationAttempt
+    implements Schedulable {
+
+  private static final Log LOG = LogFactory.getLog(FSAppAttempt.class);
+  private static final DefaultResourceCalculator RESOURCE_CALCULATOR
+      = new DefaultResourceCalculator();
+
+  private long startTime;
+  private Priority priority;
+  private ResourceWeights resourceWeights;
+  private Resource demand = Resources.createResource(0);
+  private FairScheduler scheduler;
+  private Resource fairShare = Resources.createResource(0, 0);
+  private Resource preemptedResources = Resources.createResource(0);
+  private RMContainerComparator comparator = new RMContainerComparator();
+  private final Map<RMContainer, Long> preemptionMap = new HashMap<RMContainer, Long>();
+
+  /**
+   * Delay scheduling: We often want to prioritize scheduling of node-local
+   * containers over rack-local or off-switch containers. To acheive this
+   * we first only allow node-local assigments for a given prioirty level,
+   * then relax the locality threshold once we've had a long enough period
+   * without succesfully scheduling. We measure both the number of "missed"
+   * scheduling opportunities since the last container was scheduled
+   * at the current allowed level and the time since the last container
+   * was scheduled. Currently we use only the former.
+   */
+  private final Map<Priority, NodeType> allowedLocalityLevel =
+      new HashMap<Priority, NodeType>();
+
+  public FSAppAttempt(FairScheduler scheduler,
+      ApplicationAttemptId applicationAttemptId, String user, FSLeafQueue queue,
+      ActiveUsersManager activeUsersManager, RMContext rmContext) {
+    super(applicationAttemptId, user, queue, activeUsersManager, rmContext);
+
+    this.scheduler = scheduler;
+    this.startTime = scheduler.getClock().getTime();
+    this.priority = Priority.newInstance(1);
+    this.resourceWeights = new ResourceWeights();
+  }
+
+  public ResourceWeights getResourceWeights() {
+    return resourceWeights;
+  }
+
+  /**
+   * Get metrics reference from containing queue.
+   */
+  public QueueMetrics getMetrics() {
+    return queue.getMetrics();
+  }
+
+  synchronized public void containerCompleted(RMContainer rmContainer,
+      ContainerStatus containerStatus, RMContainerEventType event) {
+    
+    Container container = rmContainer.getContainer();
+    ContainerId containerId = container.getId();
+    
+    // Remove from the list of newly allocated containers if found
+    newlyAllocatedContainers.remove(rmContainer);
+    
+    // Inform the container
+    rmContainer.handle(
+        new RMContainerFinishedEvent(
+            containerId,
+            containerStatus, 
+            event)
+        );
+    LOG.info("Completed container: " + rmContainer.getContainerId() + 
+        " in state: " + rmContainer.getState() + " event:" + event);
+    
+    // Remove from the list of containers
+    liveContainers.remove(rmContainer.getContainerId());
+
+    RMAuditLogger.logSuccess(getUser(), 
+        AuditConstants.RELEASE_CONTAINER, "SchedulerApp", 
+        getApplicationId(), containerId);
+    
+    // Update usage metrics 
+    Resource containerResource = rmContainer.getContainer().getResource();
+    queue.getMetrics().releaseResources(getUser(), 1, containerResource);
+    Resources.subtractFrom(currentConsumption, containerResource);
+
+    // remove from preemption map if it is completed
+    preemptionMap.remove(rmContainer);
+  }
+
+  private synchronized void unreserveInternal(
+      Priority priority, FSSchedulerNode node) {
+    Map<NodeId, RMContainer> reservedContainers = 
+        this.reservedContainers.get(priority);
+    RMContainer reservedContainer = reservedContainers.remove(node.getNodeID());
+    if (reservedContainers.isEmpty()) {
+      this.reservedContainers.remove(priority);
+    }
+    
+    // Reset the re-reservation count
+    resetReReservations(priority);
+
+    Resource resource = reservedContainer.getContainer().getResource();
+    Resources.subtractFrom(currentReservation, resource);
+
+    LOG.info("Application " + getApplicationId() + " unreserved " + " on node "
+        + node + ", currently has " + reservedContainers.size() + " at priority "
+        + priority + "; currentReservation " + currentReservation);
+  }
+
+  public synchronized float getLocalityWaitFactor(
+      Priority priority, int clusterNodes) {
+    // Estimate: Required unique resources (i.e. hosts + racks)
+    int requiredResources = 
+        Math.max(this.getResourceRequests(priority).size() - 1, 0);
+    
+    // waitFactor can't be more than '1' 
+    // i.e. no point skipping more than clustersize opportunities
+    return Math.min(((float)requiredResources / clusterNodes), 1.0f);
+  }
+
+  /**
+   * Return the level at which we are allowed to schedule containers, given the
+   * current size of the cluster and thresholds indicating how many nodes to
+   * fail at (as a fraction of cluster size) before relaxing scheduling
+   * constraints.
+   */
+  public synchronized NodeType getAllowedLocalityLevel(Priority priority,
+      int numNodes, double nodeLocalityThreshold, double rackLocalityThreshold) {
+    // upper limit on threshold
+    if (nodeLocalityThreshold > 1.0) { nodeLocalityThreshold = 1.0; }
+    if (rackLocalityThreshold > 1.0) { rackLocalityThreshold = 1.0; }
+
+    // If delay scheduling is not being used, can schedule anywhere
+    if (nodeLocalityThreshold < 0.0 || rackLocalityThreshold < 0.0) {
+      return NodeType.OFF_SWITCH;
+    }
+
+    // Default level is NODE_LOCAL
+    if (!allowedLocalityLevel.containsKey(priority)) {
+      allowedLocalityLevel.put(priority, NodeType.NODE_LOCAL);
+      return NodeType.NODE_LOCAL;
+    }
+
+    NodeType allowed = allowedLocalityLevel.get(priority);
+
+    // If level is already most liberal, we're done
+    if (allowed.equals(NodeType.OFF_SWITCH)) return NodeType.OFF_SWITCH;
+
+    double threshold = allowed.equals(NodeType.NODE_LOCAL) ? nodeLocalityThreshold :
+      rackLocalityThreshold;
+
+    // Relax locality constraints once we've surpassed threshold.
+    if (getSchedulingOpportunities(priority) > (numNodes * threshold)) {
+      if (allowed.equals(NodeType.NODE_LOCAL)) {
+        allowedLocalityLevel.put(priority, NodeType.RACK_LOCAL);
+        resetSchedulingOpportunities(priority);
+      }
+      else if (allowed.equals(NodeType.RACK_LOCAL)) {
+        allowedLocalityLevel.put(priority, NodeType.OFF_SWITCH);
+        resetSchedulingOpportunities(priority);
+      }
+    }
+    return allowedLocalityLevel.get(priority);
+  }
+
+  /**
+   * Return the level at which we are allowed to schedule containers.
+   * Given the thresholds indicating how much time passed before relaxing
+   * scheduling constraints.
+   */
+  public synchronized NodeType getAllowedLocalityLevelByTime(Priority priority,
+          long nodeLocalityDelayMs, long rackLocalityDelayMs,
+          long currentTimeMs) {
+
+    // if not being used, can schedule anywhere
+    if (nodeLocalityDelayMs < 0 || rackLocalityDelayMs < 0) {
+      return NodeType.OFF_SWITCH;
+    }
+
+    // default level is NODE_LOCAL
+    if (! allowedLocalityLevel.containsKey(priority)) {
+      allowedLocalityLevel.put(priority, NodeType.NODE_LOCAL);
+      return NodeType.NODE_LOCAL;
+    }
+
+    NodeType allowed = allowedLocalityLevel.get(priority);
+
+    // if level is already most liberal, we're done
+    if (allowed.equals(NodeType.OFF_SWITCH)) {
+      return NodeType.OFF_SWITCH;
+    }
+
+    // check waiting time
+    long waitTime = currentTimeMs;
+    if (lastScheduledContainer.containsKey(priority)) {
+      waitTime -= lastScheduledContainer.get(priority);
+    } else {
+      waitTime -= getStartTime();
+    }
+
+    long thresholdTime = allowed.equals(NodeType.NODE_LOCAL) ?
+            nodeLocalityDelayMs : rackLocalityDelayMs;
+
+    if (waitTime > thresholdTime) {
+      if (allowed.equals(NodeType.NODE_LOCAL)) {
+        allowedLocalityLevel.put(priority, NodeType.RACK_LOCAL);
+        resetSchedulingOpportunities(priority, currentTimeMs);
+      } else if (allowed.equals(NodeType.RACK_LOCAL)) {
+        allowedLocalityLevel.put(priority, NodeType.OFF_SWITCH);
+        resetSchedulingOpportunities(priority, currentTimeMs);
+      }
+    }
+    return allowedLocalityLevel.get(priority);
+  }
+
+  synchronized public RMContainer allocate(NodeType type, FSSchedulerNode node,
+      Priority priority, ResourceRequest request,
+      Container container) {
+    // Update allowed locality level
+    NodeType allowed = allowedLocalityLevel.get(priority);
+    if (allowed != null) {
+      if (allowed.equals(NodeType.OFF_SWITCH) &&
+          (type.equals(NodeType.NODE_LOCAL) ||
+              type.equals(NodeType.RACK_LOCAL))) {
+        this.resetAllowedLocalityLevel(priority, type);
+      }
+      else if (allowed.equals(NodeType.RACK_LOCAL) &&
+          type.equals(NodeType.NODE_LOCAL)) {
+        this.resetAllowedLocalityLevel(priority, type);
+      }
+    }
+
+    // Required sanity check - AM can call 'allocate' to update resource 
+    // request without locking the scheduler, hence we need to check
+    if (getTotalRequiredResources(priority) <= 0) {
+      return null;
+    }
+    
+    // Create RMContainer
+    RMContainer rmContainer = new RMContainerImpl(container, 
+        getApplicationAttemptId(), node.getNodeID(),
+        appSchedulingInfo.getUser(), rmContext);
+
+    // Add it to allContainers list.
+    newlyAllocatedContainers.add(rmContainer);
+    liveContainers.put(container.getId(), rmContainer);    
+
+    // Update consumption and track allocations
+    List<ResourceRequest> resourceRequestList = appSchedulingInfo.allocate(
+        type, node, priority, request, container);
+    Resources.addTo(currentConsumption, container.getResource());
+
+    // Update resource requests related to "request" and store in RMContainer
+    ((RMContainerImpl) rmContainer).setResourceRequests(resourceRequestList);
+
+    // Inform the container
+    rmContainer.handle(
+        new RMContainerEvent(container.getId(), RMContainerEventType.START));
+
+    if (LOG.isDebugEnabled()) {
+      LOG.debug("allocate: applicationAttemptId=" 
+          + container.getId().getApplicationAttemptId() 
+          + " container=" + container.getId() + " host="
+          + container.getNodeId().getHost() + " type=" + type);
+    }
+    RMAuditLogger.logSuccess(getUser(), 
+        AuditConstants.ALLOC_CONTAINER, "SchedulerApp", 
+        getApplicationId(), container.getId());
+    
+    return rmContainer;
+  }
+
+  /**
+   * Should be called when the scheduler assigns a container at a higher
+   * degree of locality than the current threshold. Reset the allowed locality
+   * level to a higher degree of locality.
+   */
+  public synchronized void resetAllowedLocalityLevel(Priority priority,
+      NodeType level) {
+    NodeType old = allowedLocalityLevel.get(priority);
+    LOG.info("Raising locality level from " + old + " to " + level + " at " +
+        " priority " + priority);
+    allowedLocalityLevel.put(priority, level);
+  }
+
+  // related methods
+  public void addPreemption(RMContainer container, long time) {
+    assert preemptionMap.get(container) == null;
+    preemptionMap.put(container, time);
+    Resources.addTo(preemptedResources, container.getAllocatedResource());
+  }
+
+  public Long getContainerPreemptionTime(RMContainer container) {
+    return preemptionMap.get(container);
+  }
+
+  public Set<RMContainer> getPreemptionContainers() {
+    return preemptionMap.keySet();
+  }
+  
+  @Override
+  public FSLeafQueue getQueue() {
+    return (FSLeafQueue)super.getQueue();
+  }
+
+  public Resource getPreemptedResources() {
+    return preemptedResources;
+  }
+
+  public void resetPreemptedResources() {
+    preemptedResources = Resources.createResource(0);
+    for (RMContainer container : getPreemptionContainers()) {
+      Resources.addTo(preemptedResources, container.getAllocatedResource());
+    }
+  }
+
+  public void clearPreemptedResources() {
+    preemptedResources.setMemory(0);
+    preemptedResources.setVirtualCores(0);
+  }
+
+  /**
+   * Create and return a container object reflecting an allocation for the
+   * given appliction on the given node with the given capability and
+   * priority.
+   */
+  public Container createContainer(
+      FSSchedulerNode node, Resource capability, Priority priority) {
+
+    NodeId nodeId = node.getRMNode().getNodeID();
+    ContainerId containerId = BuilderUtils.newContainerId(
+        getApplicationAttemptId(), getNewContainerId());
+
+    // Create the container
+    Container container =
+        BuilderUtils.newContainer(containerId, nodeId, node.getRMNode()
+            .getHttpAddress(), capability, priority, null);
+
+    return container;
+  }
+
+  /**
+   * Reserve a spot for {@code container} on this {@code node}. If
+   * the container is {@code alreadyReserved} on the node, simply
+   * update relevant bookeeping. This dispatches ro relevant handlers
+   * in {@link FSSchedulerNode}..
+   */
+  private void reserve(Priority priority, FSSchedulerNode node,
+      Container container, boolean alreadyReserved) {
+    LOG.info("Making reservation: node=" + node.getNodeName() +
+        " app_id=" + getApplicationId());
+
+    if (!alreadyReserved) {
+      getMetrics().reserveResource(getUser(), container.getResource());
+      RMContainer rmContainer =
+          super.reserve(node, priority, null, container);
+      node.reserveResource(this, priority, rmContainer);
+    } else {
+      RMContainer rmContainer = node.getReservedContainer();
+      super.reserve(node, priority, rmContainer, container);
+      node.reserveResource(this, priority, rmContainer);
+    }
+  }
+
+  /**
+   * Remove the reservation on {@code node} at the given {@link Priority}.
+   * This dispatches SchedulerNode handlers as well.
+   */
+  public void unreserve(Priority priority, FSSchedulerNode node) {
+    RMContainer rmContainer = node.getReservedContainer();
+    unreserveInternal(priority, node);
+    node.unreserveResource(this);
+    getMetrics().unreserveResource(
+        getUser(), rmContainer.getContainer().getResource());
+  }
+
+  /**
+   * Assign a container to this node to facilitate {@code request}. If node does
+   * not have enough memory, create a reservation. This is called once we are
+   * sure the particular request should be facilitated by this node.
+   *
+   * @param node
+   *     The node to try placing the container on.
+   * @param request
+   *     The ResourceRequest we're trying to satisfy.
+   * @param type
+   *     The locality of the assignment.
+   * @param reserved
+   *     Whether there's already a container reserved for this app on the node.
+   * @return
+   *     If an assignment was made, returns the resources allocated to the
+   *     container.  If a reservation was made, returns
+   *     FairScheduler.CONTAINER_RESERVED.  If no assignment or reservation was
+   *     made, returns an empty resource.
+   */
+  private Resource assignContainer(
+      FSSchedulerNode node, ResourceRequest request, NodeType type,
+      boolean reserved) {
+
+    // How much does this request need?
+    Resource capability = request.getCapability();
+
+    // How much does the node have?
+    Resource available = node.getAvailableResource();
+
+    Container container = null;
+    if (reserved) {
+      container = node.getReservedContainer().getContainer();
+    } else {
+      container = createContainer(node, capability, request.getPriority());
+    }
+
+    // Can we allocate a container on this node?
+    if (Resources.fitsIn(capability, available)) {
+      // Inform the application of the new container for this request
+      RMContainer allocatedContainer =
+          allocate(type, node, request.getPriority(), request, container);
+      if (allocatedContainer == null) {
+        // Did the application need this resource?
+        if (reserved) {
+          unreserve(request.getPriority(), node);
+        }
+        return Resources.none();
+      }
+
+      // If we had previously made a reservation, delete it
+      if (reserved) {
+        unreserve(request.getPriority(), node);
+      }
+
+      // Inform the node
+      node.allocateContainer(allocatedContainer);
+
+      // If this container is used to run AM, update the leaf queue's AM usage
+      if (getLiveContainers().size() == 1 && !getUnmanagedAM()) {
+        getQueue().addAMResourceUsage(container.getResource());
+        setAmRunning(true);
+      }
+
+      return container.getResource();
+    } else {
+      // The desired container won't fit here, so reserve
+      reserve(request.getPriority(), node, container, reserved);
+
+      return FairScheduler.CONTAINER_RESERVED;
+    }
+  }
+
+  private Resource assignContainer(FSSchedulerNode node, boolean reserved) {
+    if (LOG.isDebugEnabled()) {
+      LOG.debug("Node offered to app: " + getName() + " reserved: " + reserved);
+    }
+
+    Collection<Priority> prioritiesToTry = (reserved) ?
+        Arrays.asList(node.getReservedContainer().getReservedPriority()) :
+        getPriorities();
+
+    // For each priority, see if we can schedule a node local, rack local
+    // or off-switch request. Rack of off-switch requests may be delayed
+    // (not scheduled) in order to promote better locality.
+    synchronized (this) {
+      for (Priority priority : prioritiesToTry) {
+        if (getTotalRequiredResources(priority) <= 0 ||
+            !hasContainerForNode(priority, node)) {
+          continue;
+        }
+
+        addSchedulingOpportunity(priority);
+
+        // Check the AM resource usage for the leaf queue
+        if (getLiveContainers().size() == 0 && !getUnmanagedAM()) {
+          if (!getQueue().canRunAppAM(getAMResource())) {
+            return Resources.none();
+          }
+        }
+
+        ResourceRequest rackLocalRequest = getResourceRequest(priority,
+            node.getRackName());
+        ResourceRequest localRequest = getResourceRequest(priority,
+            node.getNodeName());
+
+        if (localRequest != null && !localRequest.getRelaxLocality()) {
+          LOG.warn("Relax locality off is not supported on local request: "
+              + localRequest);
+        }
+
+        NodeType allowedLocality;
+        if (scheduler.isContinuousSchedulingEnabled()) {
+          allowedLocality = getAllowedLocalityLevelByTime(priority,
+              scheduler.getNodeLocalityDelayMs(),
+              scheduler.getRackLocalityDelayMs(),
+              scheduler.getClock().getTime());
+        } else {
+          allowedLocality = getAllowedLocalityLevel(priority,
+              scheduler.getNumClusterNodes(),
+              scheduler.getNodeLocalityThreshold(),
+              scheduler.getRackLocalityThreshold());
+        }
+
+        if (rackLocalRequest != null && rackLocalRequest.getNumContainers() != 0
+            && localRequest != null && localRequest.getNumContainers() != 0) {
+          return assignContainer(node, localRequest,
+              NodeType.NODE_LOCAL, reserved);
+        }
+
+        if (rackLocalRequest != null && !rackLocalRequest.getRelaxLocality()) {
+          continue;
+        }
+
+        if (rackLocalRequest != null && rackLocalRequest.getNumContainers() != 0
+            && (allowedLocality.equals(NodeType.RACK_LOCAL) ||
+            allowedLocality.equals(NodeType.OFF_SWITCH))) {
+          return assignContainer(node, rackLocalRequest,
+              NodeType.RACK_LOCAL, reserved);
+        }
+
+        ResourceRequest offSwitchRequest =
+            getResourceRequest(priority, ResourceRequest.ANY);
+        if (offSwitchRequest != null && !offSwitchRequest.getRelaxLocality()) {
+          continue;
+        }
+
+        if (offSwitchRequest != null && offSwitchRequest.getNumContainers() != 0
+            && allowedLocality.equals(NodeType.OFF_SWITCH)) {
+          return assignContainer(node, offSwitchRequest,
+              NodeType.OFF_SWITCH, reserved);
+        }
+      }
+    }
+    return Resources.none();
+  }
+
+  /**
+   * Called when this application already has an existing reservation on the
+   * given node.  Sees whether we can turn the reservation into an allocation.
+   * Also checks whether the application needs the reservation anymore, and
+   * releases it if not.
+   *
+   * @param node
+   *     Node that the application has an existing reservation on
+   */
+  public Resource assignReservedContainer(FSSchedulerNode node) {
+    RMContainer rmContainer = node.getReservedContainer();
+    Priority priority = rmContainer.getReservedPriority();
+
+    // Make sure the application still needs requests at this priority
+    if (getTotalRequiredResources(priority) == 0) {
+      unreserve(priority, node);
+      return Resources.none();
+    }
+
+    // Fail early if the reserved container won't fit.
+    // Note that we have an assumption here that there's only one container size
+    // per priority.
+    if (!Resources.fitsIn(node.getReservedContainer().getReservedResource(),
+        node.getAvailableResource())) {
+      return Resources.none();
+    }
+
+    return assignContainer(node, true);
+  }
+
+
+  /**
+   * Whether this app has containers requests that could be satisfied on the
+   * given node, if the node had full space.
+   */
+  public boolean hasContainerForNode(Priority prio, FSSchedulerNode node) {
+    ResourceRequest anyRequest = getResourceRequest(prio, ResourceRequest.ANY);
+    ResourceRequest rackRequest = getResourceRequest(prio, node.getRackName());
+    ResourceRequest nodeRequest = getResourceRequest(prio, node.getNodeName());
+
+    return
+        // There must be outstanding requests at the given priority:
+        anyRequest != null && anyRequest.getNumContainers() > 0 &&
+            // If locality relaxation is turned off at *-level, there must be a
+            // non-zero request for the node's rack:
+            (anyRequest.getRelaxLocality() ||
+                (rackRequest != null && rackRequest.getNumContainers() > 0)) &&
+            // If locality relaxation is turned off at rack-level, there must be a
+            // non-zero request at the node:
+            (rackRequest == null || rackRequest.getRelaxLocality() ||
+                (nodeRequest != null && nodeRequest.getNumContainers() > 0)) &&
+            // The requested container must be able to fit on the node:
+            Resources.lessThanOrEqual(RESOURCE_CALCULATOR, null,
+                anyRequest.getCapability(), node.getRMNode().getTotalCapability());
+  }
+
+
+  static class RMContainerComparator implements Comparator<RMContainer>,
+      Serializable {
+    @Override
+    public int compare(RMContainer c1, RMContainer c2) {
+      int ret = c1.getContainer().getPriority().compareTo(
+          c2.getContainer().getPriority());
+      if (ret == 0) {
+        return c2.getContainerId().compareTo(c1.getContainerId());
+      }
+      return ret;
+    }
+  }
+
+  /* Schedulable methods implementation */
+
+  @Override
+  public String getName() {
+    return getApplicationId().toString();
+  }
+
+  @Override
+  public Resource getDemand() {
+    return demand;
+  }
+
+  @Override
+  public long getStartTime() {
+    return startTime;
+  }
+
+  @Override
+  public Resource getMinShare() {
+    return Resources.none();
+  }
+
+  @Override
+  public Resource getMaxShare() {
+    return Resources.unbounded();
+  }
+
+  @Override
+  public Resource getResourceUsage() {
+    // Here the getPreemptedResources() always return zero, except in
+    // a preemption round
+    return Resources.subtract(getCurrentConsumption(), getPreemptedResources());
+  }
+
+  @Override
+  public ResourceWeights getWeights() {
+    return scheduler.getAppWeight(this);
+  }
+
+  @Override
+  public Priority getPriority() {
+    // Right now per-app priorities are not passed to scheduler,
+    // so everyone has the same priority.
+    return priority;
+  }
+
+  @Override
+  public Resource getFairShare() {
+    return this.fairShare;
+  }
+
+  @Override
+  public void setFairShare(Resource fairShare) {
+    this.fairShare = fairShare;
+  }
+
+  @Override
+  public boolean isActive() {
+    return true;
+  }
+
+
+  @Override
+  public void updateDemand() {
+    demand = Resources.createResource(0);
+    // Demand is current consumption plus outstanding requests
+    Resources.addTo(demand, getCurrentConsumption());
+
+    // Add up outstanding resource requests
+    synchronized (this) {
+      for (Priority p : getPriorities()) {
+        for (ResourceRequest r : getResourceRequests(p).values()) {
+          Resource total = Resources.multiply(r.getCapability(), r.getNumContainers());
+          Resources.addTo(demand, total);
+        }
+      }
+    }
+  }
+
+  @Override
+  public Resource assignContainer(FSSchedulerNode node) {
+    return assignContainer(node, false);
+  }
+
+  /**
+   * Preempt a running container according to the priority
+   */
+  @Override
+  public RMContainer preemptContainer() {
+    if (LOG.isDebugEnabled()) {
+      LOG.debug("App " + getName() + " is going to preempt a running " +
+          "container");
+    }
+
+    RMContainer toBePreempted = null;
+    for (RMContainer container : getLiveContainers()) {
+      if (!getPreemptionContainers().contains(container) &&
+          (toBePreempted == null ||
+              comparator.compare(toBePreempted, container) > 0)) {
+        toBePreempted = container;
+      }
+    }
+    return toBePreempted;
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSLeafQueue.java

@@ -44,11 +44,11 @@ import org.apache.hadoop.yarn.util.resource.Resources;
 public class FSLeafQueue extends FSQueue {
   private static final Log LOG = LogFactory.getLog(
       FSLeafQueue.class.getName());
-    
-  private final List<AppSchedulable> runnableAppScheds = // apps that are runnable
-      new ArrayList<AppSchedulable>();
-  private final List<AppSchedulable> nonRunnableAppScheds =
-      new ArrayList<AppSchedulable>();
+
+  private final List<FSAppAttempt> runnableApps = // apps that are runnable
+      new ArrayList<FSAppAttempt>();
+  private final List<FSAppAttempt> nonRunnableApps =
+      new ArrayList<FSAppAttempt>();
   
   private Resource demand = Resources.createResource(0);
   
@@ -70,33 +70,31 @@ public class FSLeafQueue extends FSQueue {
     amResourceUsage = Resource.newInstance(0, 0);
   }
   
-  public void addApp(FSSchedulerApp app, boolean runnable) {
-    AppSchedulable appSchedulable = new AppSchedulable(scheduler, app, this);
-    app.setAppSchedulable(appSchedulable);
+  public void addApp(FSAppAttempt app, boolean runnable) {
     if (runnable) {
-      runnableAppScheds.add(appSchedulable);
+      runnableApps.add(app);
     } else {
-      nonRunnableAppScheds.add(appSchedulable);
+      nonRunnableApps.add(app);
     }
   }
   
   // for testing
-  void addAppSchedulable(AppSchedulable appSched) {
-    runnableAppScheds.add(appSched);
+  void addAppSchedulable(FSAppAttempt appSched) {
+    runnableApps.add(appSched);
   }
   
   /**
    * Removes the given app from this queue.
    * @return whether or not the app was runnable
    */
-  public boolean removeApp(FSSchedulerApp app) {
-    if (runnableAppScheds.remove(app.getAppSchedulable())) {
+  public boolean removeApp(FSAppAttempt app) {
+    if (runnableApps.remove(app)) {
       // Update AM resource usage
       if (app.isAmRunning() && app.getAMResource() != null) {
         Resources.subtractFrom(amResourceUsage, app.getAMResource());
       }
       return true;
-    } else if (nonRunnableAppScheds.remove(app.getAppSchedulable())) {
+    } else if (nonRunnableApps.remove(app)) {
       return false;
     } else {
       throw new IllegalStateException("Given app to remove " + app +
@@ -104,22 +102,22 @@ public class FSLeafQueue extends FSQueue {
     }
   }
   
-  public Collection<AppSchedulable> getRunnableAppSchedulables() {
-    return runnableAppScheds;
+  public Collection<FSAppAttempt> getRunnableAppSchedulables() {
+    return runnableApps;
   }
   
-  public List<AppSchedulable> getNonRunnableAppSchedulables() {
-    return nonRunnableAppScheds;
+  public List<FSAppAttempt> getNonRunnableAppSchedulables() {
+    return nonRunnableApps;
   }
   
   @Override
   public void collectSchedulerApplications(
       Collection<ApplicationAttemptId> apps) {
-    for (AppSchedulable appSched : runnableAppScheds) {
-      apps.add(appSched.getApp().getApplicationAttemptId());
+    for (FSAppAttempt appSched : runnableApps) {
+      apps.add(appSched.getApplicationAttemptId());
     }
-    for (AppSchedulable appSched : nonRunnableAppScheds) {
-      apps.add(appSched.getApp().getApplicationAttemptId());
+    for (FSAppAttempt appSched : nonRunnableApps) {
+      apps.add(appSched.getApplicationAttemptId());
     }
   }
 
@@ -145,10 +143,10 @@ public class FSLeafQueue extends FSQueue {
   @Override
   public Resource getResourceUsage() {
     Resource usage = Resources.createResource(0);
-    for (AppSchedulable app : runnableAppScheds) {
+    for (FSAppAttempt app : runnableApps) {
       Resources.addTo(usage, app.getResourceUsage());
     }
-    for (AppSchedulable app : nonRunnableAppScheds) {
+    for (FSAppAttempt app : nonRunnableApps) {
       Resources.addTo(usage, app.getResourceUsage());
     }
     return usage;
@@ -165,13 +163,13 @@ public class FSLeafQueue extends FSQueue {
     Resource maxRes = scheduler.getAllocationConfiguration()
         .getMaxResources(getName());
     demand = Resources.createResource(0);
-    for (AppSchedulable sched : runnableAppScheds) {
+    for (FSAppAttempt sched : runnableApps) {
       if (Resources.equals(demand, maxRes)) {
         break;
       }
       updateDemandForApp(sched, maxRes);
     }
-    for (AppSchedulable sched : nonRunnableAppScheds) {
+    for (FSAppAttempt sched : nonRunnableApps) {
       if (Resources.equals(demand, maxRes)) {
         break;
       }
@@ -183,7 +181,7 @@ public class FSLeafQueue extends FSQueue {
     }
   }
   
-  private void updateDemandForApp(AppSchedulable sched, Resource maxRes) {
+  private void updateDemandForApp(FSAppAttempt sched, Resource maxRes) {
     sched.updateDemand();
     Resource toAdd = sched.getDemand();
     if (LOG.isDebugEnabled()) {
@@ -207,9 +205,9 @@ public class FSLeafQueue extends FSQueue {
     }
 
     Comparator<Schedulable> comparator = policy.getComparator();
-    Collections.sort(runnableAppScheds, comparator);
-    for (AppSchedulable sched : runnableAppScheds) {
-      if (SchedulerAppUtils.isBlacklisted(sched.getApp(), node, LOG)) {
+    Collections.sort(runnableApps, comparator);
+    for (FSAppAttempt sched : runnableApps) {
+      if (SchedulerAppUtils.isBlacklisted(sched, node, LOG)) {
         continue;
       }
 
@@ -237,8 +235,8 @@ public class FSLeafQueue extends FSQueue {
 
     // Choose the app that is most over fair share
     Comparator<Schedulable> comparator = policy.getComparator();
-    AppSchedulable candidateSched = null;
-    for (AppSchedulable sched : runnableAppScheds) {
+    FSAppAttempt candidateSched = null;
+    for (FSAppAttempt sched : runnableApps) {
       if (candidateSched == null ||
           comparator.compare(sched, candidateSched) > 0) {
         candidateSched = sched;
@@ -291,7 +289,7 @@ public class FSLeafQueue extends FSQueue {
 
   @Override
   public int getNumRunnableApps() {
-    return runnableAppScheds.size();
+    return runnableApps.size();
   }
   
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSQueue.java

@@ -39,7 +39,8 @@ import org.apache.hadoop.yarn.util.resource.Resources;
 
 @Private
 @Unstable
-public abstract class FSQueue extends Schedulable implements Queue {
+public abstract class FSQueue implements Queue, Schedulable {
+  private Resource fairShare = Resources.createResource(0, 0);
   private final String name;
   protected final FairScheduler scheduler;
   private final FSQueueMetrics metrics;
@@ -139,10 +140,15 @@ public abstract class FSQueue extends Schedulable implements Queue {
   public FSQueueMetrics getMetrics() {
     return metrics;
   }
-  
+
+  /** Get the fair share assigned to this Schedulable. */
+  public Resource getFairShare() {
+    return fairShare;
+  }
+
   @Override
   public void setFairShare(Resource fairShare) {
-    super.setFairShare(fairShare);
+    this.fairShare = fairShare;
     metrics.setFairShare(fairShare);
   }
   
@@ -187,4 +193,16 @@ public abstract class FSQueue extends Schedulable implements Queue {
     }
     return true;
   }
+
+  @Override
+  public boolean isActive() {
+    return getNumRunnableApps() > 0;
+  }
+
+  /** Convenient toString implementation for debugging. */
+  @Override
+  public String toString() {
+    return String.format("[%s, demand=%s, running=%s, share=%s, w=%s]",
+        getName(), getDemand(), getResourceUsage(), fairShare, getWeights());
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSSchedulerNode.java

@@ -35,7 +35,7 @@ public class FSSchedulerNode extends SchedulerNode {
 
   private static final Log LOG = LogFactory.getLog(FSSchedulerNode.class);
 
-  private AppSchedulable reservedAppSchedulable;
+  private FSAppAttempt reservedAppSchedulable;
 
   public FSSchedulerNode(RMNode node, boolean usePortForNodeName) {
     super(node, usePortForNodeName);
@@ -76,7 +76,7 @@ public class FSSchedulerNode extends SchedulerNode {
           " on node " + this + " for application " + application);
     }
     setReservedContainer(container);
-    this.reservedAppSchedulable = ((FSSchedulerApp) application).getAppSchedulable();
+    this.reservedAppSchedulable = (FSAppAttempt) application;
   }
 
   @Override
@@ -98,7 +98,7 @@ public class FSSchedulerNode extends SchedulerNode {
     this.reservedAppSchedulable = null;
   }
 
-  public synchronized AppSchedulable getReservedAppSchedulable() {
+  public synchronized FSAppAttempt getReservedAppSchedulable() {
     return reservedAppSchedulable;
   }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FairScheduler.java

@@ -117,7 +117,7 @@ import com.google.common.base.Preconditions;
 @Unstable
 @SuppressWarnings("unchecked")
 public class FairScheduler extends
-    AbstractYarnScheduler<FSSchedulerApp, FSSchedulerNode> {
+    AbstractYarnScheduler<FSAppAttempt, FSSchedulerNode> {
   private FairSchedulerConfiguration conf;
 
   private Resource incrAllocation;
@@ -432,8 +432,8 @@ public class FairScheduler extends
     try {
       // Reset preemptedResource for each app
       for (FSLeafQueue queue : getQueueManager().getLeafQueues()) {
-        for (AppSchedulable app : queue.getRunnableAppSchedulables()) {
-          app.getApp().resetPreemptedResources();
+        for (FSAppAttempt app : queue.getRunnableAppSchedulables()) {
+          app.resetPreemptedResources();
         }
       }
 
@@ -453,8 +453,8 @@ public class FairScheduler extends
     } finally {
       // Clear preemptedResources for each app
       for (FSLeafQueue queue : getQueueManager().getLeafQueues()) {
-        for (AppSchedulable app : queue.getRunnableAppSchedulables()) {
-          app.getApp().clearPreemptedResources();
+        for (FSAppAttempt app : queue.getRunnableAppSchedulables()) {
+          app.clearPreemptedResources();
         }
       }
     }
@@ -465,7 +465,7 @@ public class FairScheduler extends
   
   protected void warnOrKillContainer(RMContainer container) {
     ApplicationAttemptId appAttemptId = container.getApplicationAttemptId();
-    FSSchedulerApp app = getSchedulerApp(appAttemptId);
+    FSAppAttempt app = getSchedulerApp(appAttemptId);
     FSLeafQueue queue = app.getQueue();
     LOG.info("Preempting container (prio=" + container.getContainer().getPriority() +
         "res=" + container.getContainer().getResource() +
@@ -490,7 +490,7 @@ public class FairScheduler extends
             (getClock().getTime() - time) + "ms)");
       }
     } else {
-      // track the request in the FSSchedulerApp itself
+      // track the request in the FSAppAttempt itself
       app.addPreemption(container, getClock().getTime());
     }
   }
@@ -541,7 +541,7 @@ public class FairScheduler extends
   }
 
   // synchronized for sizeBasedWeight
-  public synchronized ResourceWeights getAppWeight(AppSchedulable app) {
+  public synchronized ResourceWeights getAppWeight(FSAppAttempt app) {
     double weight = 1.0;
     if (sizeBasedWeight) {
       // Set weight based on current memory demand
@@ -636,8 +636,8 @@ public class FairScheduler extends
       return;
     }
   
-    SchedulerApplication<FSSchedulerApp> application =
-        new SchedulerApplication<FSSchedulerApp>(queue, user);
+    SchedulerApplication<FSAppAttempt> application =
+        new SchedulerApplication<FSAppAttempt>(queue, user);
     applications.put(applicationId, application);
     queue.getMetrics().submitApp(user);
 
@@ -661,13 +661,13 @@ public class FairScheduler extends
       ApplicationAttemptId applicationAttemptId,
       boolean transferStateFromPreviousAttempt,
       boolean isAttemptRecovering) {
-    SchedulerApplication<FSSchedulerApp> application =
+    SchedulerApplication<FSAppAttempt> application =
         applications.get(applicationAttemptId.getApplicationId());
     String user = application.getUser();
     FSLeafQueue queue = (FSLeafQueue) application.getQueue();
 
-    FSSchedulerApp attempt =
-        new FSSchedulerApp(applicationAttemptId, user,
+    FSAppAttempt attempt =
+        new FSAppAttempt(this, applicationAttemptId, user,
             queue, new ActiveUsersManager(getRootQueueMetrics()),
             rmContext);
     if (transferStateFromPreviousAttempt) {
@@ -742,7 +742,7 @@ public class FairScheduler extends
 
   private synchronized void removeApplication(ApplicationId applicationId,
       RMAppState finalState) {
-    SchedulerApplication<FSSchedulerApp> application =
+    SchedulerApplication<FSAppAttempt> application =
         applications.get(applicationId);
     if (application == null){
       LOG.warn("Couldn't find application " + applicationId);
@@ -757,9 +757,9 @@ public class FairScheduler extends
       RMAppAttemptState rmAppAttemptFinalState, boolean keepContainers) {
     LOG.info("Application " + applicationAttemptId + " is done." +
         " finalState=" + rmAppAttemptFinalState);
-    SchedulerApplication<FSSchedulerApp> application =
+    SchedulerApplication<FSAppAttempt> application =
         applications.get(applicationAttemptId.getApplicationId());
-    FSSchedulerApp attempt = getSchedulerApp(applicationAttemptId);
+    FSAppAttempt attempt = getSchedulerApp(applicationAttemptId);
 
     if (attempt == null || application == null) {
       LOG.info("Unknown application " + applicationAttemptId + " has completed!");
@@ -820,7 +820,7 @@ public class FairScheduler extends
     Container container = rmContainer.getContainer();
 
     // Get the application for the finished container
-    FSSchedulerApp application =
+    FSAppAttempt application =
         getCurrentAttemptForContainer(container.getId());
     ApplicationId appId =
         container.getId().getApplicationAttemptId().getApplicationId();
@@ -835,8 +835,7 @@ public class FairScheduler extends
     FSSchedulerNode node = getFSSchedulerNode(container.getNodeId());
 
     if (rmContainer.getState() == RMContainerState.RESERVED) {
-      application.unreserve(node, rmContainer.getReservedPriority());
-      node.unreserveResource(application);
+      application.unreserve(rmContainer.getReservedPriority(), node);
     } else {
       application.containerCompleted(rmContainer, containerStatus, event);
       node.releaseContainer(container);
@@ -896,7 +895,7 @@ public class FairScheduler extends
       List<ResourceRequest> ask, List<ContainerId> release, List<String> blacklistAdditions, List<String> blacklistRemovals) {
 
     // Make sure this application exists
-    FSSchedulerApp application = getSchedulerApp(appAttemptId);
+    FSAppAttempt application = getSchedulerApp(appAttemptId);
     if (application == null) {
       LOG.info("Calling allocate on removed " +
           "or non existant application " + appAttemptId);
@@ -1066,13 +1065,13 @@ public class FairScheduler extends
     // 1. Check for reserved applications
     // 2. Schedule if there are no reservations
 
-    AppSchedulable reservedAppSchedulable = node.getReservedAppSchedulable();
+    FSAppAttempt reservedAppSchedulable = node.getReservedAppSchedulable();
     if (reservedAppSchedulable != null) {
       Priority reservedPriority = node.getReservedContainer().getReservedPriority();
       if (!reservedAppSchedulable.hasContainerForNode(reservedPriority, node)) {
         // Don't hold the reservation if app can no longer use it
         LOG.info("Releasing reservation that cannot be satisfied for application "
-            + reservedAppSchedulable.getApp().getApplicationAttemptId()
+            + reservedAppSchedulable.getApplicationAttemptId()
             + " on node " + node);
         reservedAppSchedulable.unreserve(reservedPriority, node);
         reservedAppSchedulable = null;
@@ -1080,7 +1079,7 @@ public class FairScheduler extends
         // Reservation exists; try to fulfill the reservation
         if (LOG.isDebugEnabled()) {
           LOG.debug("Trying to fulfill reservation for application "
-              + reservedAppSchedulable.getApp().getApplicationAttemptId()
+              + reservedAppSchedulable.getApplicationAttemptId()
               + " on node: " + node);
         }
         
@@ -1105,8 +1104,8 @@ public class FairScheduler extends
     updateRootQueueMetrics();
   }
 
-  public FSSchedulerApp getSchedulerApp(ApplicationAttemptId appAttemptId) {
-    return (FSSchedulerApp) super.getApplicationAttempt(appAttemptId);
+  public FSAppAttempt getSchedulerApp(ApplicationAttemptId appAttemptId) {
+    return super.getApplicationAttempt(appAttemptId);
   }
   
   /**
@@ -1268,8 +1267,8 @@ public class FairScheduler extends
     fsOpDurations = FSOpDurations.getInstance(true);
 
     // This stores per-application scheduling information
-    this.applications =
-        new ConcurrentHashMap<ApplicationId,SchedulerApplication<FSSchedulerApp>>();
+    this.applications = new ConcurrentHashMap<
+        ApplicationId, SchedulerApplication<FSAppAttempt>>();
     this.eventLog = new FairSchedulerEventLog();
     eventLog.init(this.conf);
 
@@ -1369,7 +1368,7 @@ public class FairScheduler extends
 
   @Override
   public List<QueueUserACLInfo> getQueueUserAclInfo() {
-    UserGroupInformation user = null;
+    UserGroupInformation user;
     try {
       user = UserGroupInformation.getCurrentUser();
     } catch (IOException ioe) {
@@ -1431,11 +1430,11 @@ public class FairScheduler extends
   @Override
   public synchronized String moveApplication(ApplicationId appId,
       String queueName) throws YarnException {
-    SchedulerApplication<FSSchedulerApp> app = applications.get(appId);
+    SchedulerApplication<FSAppAttempt> app = applications.get(appId);
     if (app == null) {
       throw new YarnException("App to be moved " + appId + " not found.");
     }
-    FSSchedulerApp attempt = (FSSchedulerApp) app.getCurrentAppAttempt();
+    FSAppAttempt attempt = (FSAppAttempt) app.getCurrentAppAttempt();
     // To serialize with FairScheduler#allocate, synchronize on app attempt
     synchronized (attempt) {
       FSLeafQueue oldQueue = (FSLeafQueue) app.getQueue();
@@ -1448,8 +1447,7 @@ public class FairScheduler extends
         return oldQueue.getQueueName();
       }
       
-      if (oldQueue.getRunnableAppSchedulables().contains(
-          attempt.getAppSchedulable())) {
+      if (oldQueue.getRunnableAppSchedulables().contains(attempt)) {
         verifyMoveDoesNotViolateConstraints(attempt, oldQueue, targetQueue);
       }
       
@@ -1458,7 +1456,7 @@ public class FairScheduler extends
     }
   }
   
-  private void verifyMoveDoesNotViolateConstraints(FSSchedulerApp app,
+  private void verifyMoveDoesNotViolateConstraints(FSAppAttempt app,
       FSLeafQueue oldQueue, FSLeafQueue targetQueue) throws YarnException {
     String queueName = targetQueue.getQueueName();
     ApplicationAttemptId appAttId = app.getApplicationAttemptId();
@@ -1495,8 +1493,8 @@ public class FairScheduler extends
    * Helper for moveApplication, which has appropriate synchronization, so all
    * operations will be atomic.
    */
-  private void executeMove(SchedulerApplication<FSSchedulerApp> app,
-      FSSchedulerApp attempt, FSLeafQueue oldQueue, FSLeafQueue newQueue) {
+  private void executeMove(SchedulerApplication<FSAppAttempt> app,
+      FSAppAttempt attempt, FSLeafQueue oldQueue, FSLeafQueue newQueue) {
     boolean wasRunnable = oldQueue.removeApp(attempt);
     // if app was not runnable before, it may be runnable now
     boolean nowRunnable = maxRunningEnforcer.canAppBeRunnable(newQueue,

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FifoAppComparator.java

@@ -25,15 +25,15 @@ import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 
 /**
- * Order {@link AppSchedulable} objects by priority and then by submit time, as
+ * Order {@link FSAppAttempt} objects by priority and then by submit time, as
  * in the default scheduler in Hadoop.
  */
 @Private
 @Unstable
-public class FifoAppComparator implements Comparator<AppSchedulable>, Serializable {
+public class FifoAppComparator implements Comparator<FSAppAttempt>, Serializable {
   private static final long serialVersionUID = 3428835083489547918L;
 
-  public int compare(AppSchedulable a1, AppSchedulable a2) {
+  public int compare(FSAppAttempt a1, FSAppAttempt a2) {
     int res = a1.getPriority().compareTo(a2.getPriority());
     if (res == 0) {
       if (a1.getStartTime() < a2.getStartTime()) {
@@ -44,7 +44,7 @@ public class FifoAppComparator implements Comparator<AppSchedulable>, Serializab
     }
     if (res == 0) {
       // If there is a tie, break it by app ID to get a deterministic order
-      res = a1.getApp().getApplicationId().compareTo(a2.getApp().getApplicationId());
+      res = a1.getApplicationId().compareTo(a2.getApplicationId());
     }
     return res;
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/MaxRunningAppsEnforcer.java

@@ -43,7 +43,7 @@ public class MaxRunningAppsEnforcer {
   // Tracks the number of running applications by user.
   private final Map<String, Integer> usersNumRunnableApps;
   @VisibleForTesting
-  final ListMultimap<String, AppSchedulable> usersNonRunnableApps;
+  final ListMultimap<String, FSAppAttempt> usersNonRunnableApps;
 
   public MaxRunningAppsEnforcer(FairScheduler scheduler) {
     this.scheduler = scheduler;
@@ -80,7 +80,7 @@ public class MaxRunningAppsEnforcer {
    * Tracks the given new runnable app for purposes of maintaining max running
    * app limits.
    */
-  public void trackRunnableApp(FSSchedulerApp app) {
+  public void trackRunnableApp(FSAppAttempt app) {
     String user = app.getUser();
     FSLeafQueue queue = app.getQueue();
     // Increment running counts for all parent queues
@@ -99,9 +99,9 @@ public class MaxRunningAppsEnforcer {
    * Tracks the given new non runnable app so that it can be made runnable when
    * it would not violate max running app limits.
    */
-  public void trackNonRunnableApp(FSSchedulerApp app) {
+  public void trackNonRunnableApp(FSAppAttempt app) {
     String user = app.getUser();
-    usersNonRunnableApps.put(user, app.getAppSchedulable());
+    usersNonRunnableApps.put(user, app);
   }
 
   /**
@@ -111,7 +111,7 @@ public class MaxRunningAppsEnforcer {
    * Runs in O(n log(n)) where n is the number of queues that are under the
    * highest queue that went from having no slack to having slack.
    */
-  public void updateRunnabilityOnAppRemoval(FSSchedulerApp app, FSLeafQueue queue) {
+  public void updateRunnabilityOnAppRemoval(FSAppAttempt app, FSLeafQueue queue) {
     AllocationConfiguration allocConf = scheduler.getAllocationConfiguration();
     
     // childqueueX might have no pending apps itself, but if a queue higher up
@@ -133,8 +133,8 @@ public class MaxRunningAppsEnforcer {
       parent = parent.getParent();
     }
 
-    List<List<AppSchedulable>> appsNowMaybeRunnable =
-        new ArrayList<List<AppSchedulable>>();
+    List<List<FSAppAttempt>> appsNowMaybeRunnable =
+        new ArrayList<List<FSAppAttempt>>();
 
     // Compile lists of apps which may now be runnable
     // We gather lists instead of building a set of all non-runnable apps so
@@ -150,26 +150,26 @@ public class MaxRunningAppsEnforcer {
       userNumRunning = 0;
     }
     if (userNumRunning == allocConf.getUserMaxApps(user) - 1) {
-      List<AppSchedulable> userWaitingApps = usersNonRunnableApps.get(user);
+      List<FSAppAttempt> userWaitingApps = usersNonRunnableApps.get(user);
       if (userWaitingApps != null) {
         appsNowMaybeRunnable.add(userWaitingApps);
       }
     }
 
     // Scan through and check whether this means that any apps are now runnable
-    Iterator<FSSchedulerApp> iter = new MultiListStartTimeIterator(
+    Iterator<FSAppAttempt> iter = new MultiListStartTimeIterator(
         appsNowMaybeRunnable);
-    FSSchedulerApp prev = null;
-    List<AppSchedulable> noLongerPendingApps = new ArrayList<AppSchedulable>();
+    FSAppAttempt prev = null;
+    List<FSAppAttempt> noLongerPendingApps = new ArrayList<FSAppAttempt>();
     while (iter.hasNext()) {
-      FSSchedulerApp next = iter.next();
+      FSAppAttempt next = iter.next();
       if (next == prev) {
         continue;
       }
 
       if (canAppBeRunnable(next.getQueue(), next.getUser())) {
         trackRunnableApp(next);
-        AppSchedulable appSched = next.getAppSchedulable();
+        FSAppAttempt appSched = next;
         next.getQueue().getRunnableAppSchedulables().add(appSched);
         noLongerPendingApps.add(appSched);
 
@@ -186,14 +186,14 @@ public class MaxRunningAppsEnforcer {
     // We remove the apps from their pending lists afterwards so that we don't
     // pull them out from under the iterator.  If they are not in these lists
     // in the first place, there is a bug.
-    for (AppSchedulable appSched : noLongerPendingApps) {
-      if (!appSched.getApp().getQueue().getNonRunnableAppSchedulables()
+    for (FSAppAttempt appSched : noLongerPendingApps) {
+      if (!appSched.getQueue().getNonRunnableAppSchedulables()
           .remove(appSched)) {
         LOG.error("Can't make app runnable that does not already exist in queue"
             + " as non-runnable: " + appSched + ". This should never happen.");
       }
       
-      if (!usersNonRunnableApps.remove(appSched.getApp().getUser(), appSched)) {
+      if (!usersNonRunnableApps.remove(appSched.getUser(), appSched)) {
         LOG.error("Waiting app " + appSched + " expected to be in "
         		+ "usersNonRunnableApps, but was not. This should never happen.");
       }
@@ -204,7 +204,7 @@ public class MaxRunningAppsEnforcer {
    * Updates the relevant tracking variables after a runnable app with the given
    * queue and user has been removed.
    */
-  public void untrackRunnableApp(FSSchedulerApp app) {
+  public void untrackRunnableApp(FSAppAttempt app) {
     // Update usersRunnableApps
     String user = app.getUser();
     int newUserNumRunning = usersNumRunnableApps.get(user) - 1;
@@ -226,8 +226,8 @@ public class MaxRunningAppsEnforcer {
   /**
    * Stops tracking the given non-runnable app
    */
-  public void untrackNonRunnableApp(FSSchedulerApp app) {
-    usersNonRunnableApps.remove(app.getUser(), app.getAppSchedulable());
+  public void untrackNonRunnableApp(FSAppAttempt app) {
+    usersNonRunnableApps.remove(app.getUser(), app);
   }
 
   /**
@@ -235,7 +235,7 @@ public class MaxRunningAppsEnforcer {
    * of non-runnable applications.
    */
   private void gatherPossiblyRunnableAppLists(FSQueue queue,
-      List<List<AppSchedulable>> appLists) {
+      List<List<FSAppAttempt>> appLists) {
     if (queue.getNumRunnableApps() < scheduler.getAllocationConfiguration()
         .getQueueMaxApps(queue.getName())) {
       if (queue instanceof FSLeafQueue) {
@@ -259,14 +259,14 @@ public class MaxRunningAppsEnforcer {
    * of O(num lists) time.
    */
   static class MultiListStartTimeIterator implements
-      Iterator<FSSchedulerApp> {
+      Iterator<FSAppAttempt> {
 
-    private List<AppSchedulable>[] appLists;
+    private List<FSAppAttempt>[] appLists;
     private int[] curPositionsInAppLists;
     private PriorityQueue<IndexAndTime> appListsByCurStartTime;
 
     @SuppressWarnings("unchecked")
-    public MultiListStartTimeIterator(List<List<AppSchedulable>> appListList) {
+    public MultiListStartTimeIterator(List<List<FSAppAttempt>> appListList) {
       appLists = appListList.toArray(new List[appListList.size()]);
       curPositionsInAppLists = new int[appLists.length];
       appListsByCurStartTime = new PriorityQueue<IndexAndTime>();
@@ -284,10 +284,10 @@ public class MaxRunningAppsEnforcer {
     }
 
     @Override
-    public FSSchedulerApp next() {
+    public FSAppAttempt next() {
       IndexAndTime indexAndTime = appListsByCurStartTime.remove();
       int nextListIndex = indexAndTime.index;
-      AppSchedulable next = appLists[nextListIndex]
+      FSAppAttempt next = appLists[nextListIndex]
           .get(curPositionsInAppLists[nextListIndex]);
       curPositionsInAppLists[nextListIndex]++;
 
@@ -299,7 +299,7 @@ public class MaxRunningAppsEnforcer {
       }
       appListsByCurStartTime.add(indexAndTime);
 
-      return next.getApp();
+      return next;
     }
 
     @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/NewAppWeightBooster.java

@@ -48,7 +48,7 @@ public class NewAppWeightBooster extends Configured implements WeightAdjuster {
     super.setConf(conf);
   }
 
-  public double adjustWeight(AppSchedulable app, double curWeight) {
+  public double adjustWeight(FSAppAttempt app, double curWeight) {
     long start = app.getStartTime();
     long now = System.currentTimeMillis();
     if (now - start < duration) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/Schedulable.java

@@ -27,20 +27,14 @@ import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer;
 import org.apache.hadoop.yarn.util.resource.Resources;
 
 /**
- * A Schedulable represents an entity that can launch tasks, such as a job
- * or a queue. It provides a common interface so that algorithms such as fair
- * sharing can be applied both within a queue and across queues. There are
- * currently two types of Schedulables: JobSchedulables, which represent a
- * single job, and QueueSchedulables, which allocate among jobs in their queue.
- *
- * Separate sets of Schedulables are used for maps and reduces. Each queue has
- * both a mapSchedulable and a reduceSchedulable, and so does each job.
+ * A Schedulable represents an entity that can be scheduled such as an
+ * application or a queue. It provides a common interface so that algorithms
+ * such as fair sharing can be applied both within a queue and across queues.
  *
  * A Schedulable is responsible for three roles:
- * 1) It can launch tasks through assignTask().
- * 2) It provides information about the job/queue to the scheduler, including:
+ * 1) Assign resources through {@link #assignContainer}.
+ * 2) It provides information about the app/queue to the scheduler, including:
  *    - Demand (maximum number of tasks required)
- *    - Number of currently running tasks
  *    - Minimum share (for queues)
  *    - Job/queue weight (for fair sharing)
  *    - Start time and priority (for FIFO)
@@ -57,81 +51,61 @@ import org.apache.hadoop.yarn.util.resource.Resources;
  */
 @Private
 @Unstable
-public abstract class Schedulable {
-  /** Fair share assigned to this Schedulable */
-  private Resource fairShare = Resources.createResource(0);
-
+public interface Schedulable {
   /**
    * Name of job/queue, used for debugging as well as for breaking ties in
    * scheduling order deterministically.
    */
-  public abstract String getName();
+  public String getName();
 
   /**
    * Maximum number of resources required by this Schedulable. This is defined as
    * number of currently utilized resources + number of unlaunched resources (that
    * are either not yet launched or need to be speculated).
    */
-  public abstract Resource getDemand();
+  public Resource getDemand();
 
   /** Get the aggregate amount of resources consumed by the schedulable. */
-  public abstract Resource getResourceUsage();
+  public Resource getResourceUsage();
 
   /** Minimum Resource share assigned to the schedulable. */
-  public abstract Resource getMinShare();
+  public Resource getMinShare();
 
   /** Maximum Resource share assigned to the schedulable. */
-  public abstract Resource getMaxShare();
+  public Resource getMaxShare();
 
   /** Job/queue weight in fair sharing. */
-  public abstract ResourceWeights getWeights();
+  public ResourceWeights getWeights();
 
   /** Start time for jobs in FIFO queues; meaningless for QueueSchedulables.*/
-  public abstract long getStartTime();
+  public long getStartTime();
 
  /** Job priority for jobs in FIFO queues; meaningless for QueueSchedulables. */
-  public abstract Priority getPriority();
+  public Priority getPriority();
 
   /** Refresh the Schedulable's demand and those of its children if any. */
-  public abstract void updateDemand();
+  public void updateDemand();
 
   /**
    * Assign a container on this node if possible, and return the amount of
    * resources assigned.
    */
-  public abstract Resource assignContainer(FSSchedulerNode node);
+  public Resource assignContainer(FSSchedulerNode node);
 
   /**
    * Preempt a container from this Schedulable if possible.
    */
-  public abstract RMContainer preemptContainer();
-
-  /** Assign a fair share to this Schedulable. */
-  public void setFairShare(Resource fairShare) {
-    this.fairShare = fairShare;
-  }
+  public RMContainer preemptContainer();
 
   /** Get the fair share assigned to this Schedulable. */
-  public Resource getFairShare() {
-    return fairShare;
-  }
+  public Resource getFairShare();
+
+  /** Assign a fair share to this Schedulable. */
+  public void setFairShare(Resource fairShare);
 
   /**
    * Returns true if queue has atleast one app running. Always returns true for
    * AppSchedulables.
    */
-  public boolean isActive() {
-    if (this instanceof FSQueue) {
-      FSQueue queue = (FSQueue) this;
-      return queue.getNumRunnableApps() > 0;
-    }
-    return true;
-  }
-
-  /** Convenient toString implementation for debugging. */
-  @Override
-  public String toString() {
-    return String.format("[%s, demand=%s, running=%s, share=%s, w=%s]",
-        getName(), getDemand(), getResourceUsage(), fairShare, getWeights());
-  }
+  public boolean isActive();
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/WeightAdjuster.java

@@ -32,5 +32,5 @@ import org.apache.hadoop.conf.Configurable;
 @Private
 @Unstable
 public interface WeightAdjuster {
-  public double adjustWeight(AppSchedulable app, double curWeight);
+  public double adjustWeight(FSAppAttempt app, double curWeight);
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/FairSchedulerInfo.java

@@ -46,8 +46,7 @@ public class FairSchedulerInfo extends SchedulerInfo {
   }
   
   public int getAppFairShare(ApplicationAttemptId appAttemptId) {
-    return scheduler.getSchedulerApp(appAttemptId).
-        getAppSchedulable().getFairShare().getMemory();
+    return scheduler.getSchedulerApp(appAttemptId).getFairShare().getMemory();
   }
   
   public FairSchedulerQueueInfo getRootQueueInfo() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/FairSchedulerLeafQueueInfo.java

@@ -24,7 +24,8 @@ import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
-import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AppSchedulable;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair
+    .FSAppAttempt;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSLeafQueue;
 
@@ -39,9 +40,9 @@ public class FairSchedulerLeafQueueInfo extends FairSchedulerQueueInfo {
   
   public FairSchedulerLeafQueueInfo(FSLeafQueue queue, FairScheduler scheduler) {
     super(queue, scheduler);
-    Collection<AppSchedulable> apps = queue.getRunnableAppSchedulables();
-    for (AppSchedulable app : apps) {
-      if (app.getApp().isPending()) {
+    Collection<FSAppAttempt> apps = queue.getRunnableAppSchedulables();
+    for (FSAppAttempt app : apps) {
+      if (app.isPending()) {
         numPendingApps++;
       } else {
         numActiveApps++;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FakeSchedulable.java

@@ -28,10 +28,11 @@ import org.apache.hadoop.yarn.util.resource.Resources;
 /**
  * Dummy implementation of Schedulable for unit testing.
  */
-public class FakeSchedulable extends Schedulable {
+public class FakeSchedulable implements Schedulable {
   private Resource usage;
   private Resource minShare;
   private Resource maxShare;
+  private Resource fairShare;
   private ResourceWeights weights;
   private Priority priority;
   private long startTime;
@@ -89,6 +90,21 @@ public class FakeSchedulable extends Schedulable {
     return null;
   }
 
+  @Override
+  public Resource getFairShare() {
+    return this.fairShare;
+  }
+
+  @Override
+  public void setFairShare(Resource fairShare) {
+    this.fairShare = fairShare;
+  }
+
+  @Override
+  public boolean isActive() {
+    return true;
+  }
+
   @Override
   public Resource getDemand() {
     return null;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFSAppAttempt.java

@@ -0,0 +1,188 @@
+/**
+ * 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
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.yarn.server.resourcemanager.MockRM;
+import static org.junit.Assert.assertEquals;
+
+import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
+import org.apache.hadoop.yarn.api.records.Priority;
+import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType;
+import org.apache.hadoop.yarn.util.Clock;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+public class TestFSAppAttempt extends FairSchedulerTestBase {
+
+  private class MockClock implements Clock {
+    private long time = 0;
+    @Override
+    public long getTime() {
+      return time;
+    }
+
+    public void tick(int seconds) {
+      time = time + seconds * 1000;
+    }
+
+  }
+
+  @Before
+  public void setup() {
+    Configuration conf = createConfiguration();
+    resourceManager = new MockRM(conf);
+    resourceManager.start();
+    scheduler = (FairScheduler) resourceManager.getResourceScheduler();
+  }
+
+  @Test
+  public void testDelayScheduling() {
+    FSLeafQueue queue = Mockito.mock(FSLeafQueue.class);
+    Priority prio = Mockito.mock(Priority.class);
+    Mockito.when(prio.getPriority()).thenReturn(1);
+    double nodeLocalityThreshold = .5;
+    double rackLocalityThreshold = .6;
+
+    ApplicationAttemptId applicationAttemptId = createAppAttemptId(1, 1);
+    RMContext rmContext = resourceManager.getRMContext();
+    FSAppAttempt schedulerApp =
+        new FSAppAttempt(scheduler, applicationAttemptId, "user1", queue ,
+            null, rmContext);
+
+    // Default level should be node-local
+    assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
+        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+
+    // First five scheduling opportunities should remain node local
+    for (int i = 0; i < 5; i++) {
+      schedulerApp.addSchedulingOpportunity(prio);
+      assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
+          prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+    }
+
+    // After five it should switch to rack local
+    schedulerApp.addSchedulingOpportunity(prio);
+    assertEquals(NodeType.RACK_LOCAL, schedulerApp.getAllowedLocalityLevel(
+        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+
+    // Manually set back to node local
+    schedulerApp.resetAllowedLocalityLevel(prio, NodeType.NODE_LOCAL);
+    schedulerApp.resetSchedulingOpportunities(prio);
+    assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
+        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+
+    // Now escalate again to rack-local, then to off-switch
+    for (int i = 0; i < 5; i++) {
+      schedulerApp.addSchedulingOpportunity(prio);
+      assertEquals(NodeType.NODE_LOCAL, schedulerApp.getAllowedLocalityLevel(
+          prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+    }
+
+    schedulerApp.addSchedulingOpportunity(prio);
+    assertEquals(NodeType.RACK_LOCAL, schedulerApp.getAllowedLocalityLevel(
+        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+
+    for (int i = 0; i < 6; i++) {
+      schedulerApp.addSchedulingOpportunity(prio);
+      assertEquals(NodeType.RACK_LOCAL, schedulerApp.getAllowedLocalityLevel(
+          prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+    }
+
+    schedulerApp.addSchedulingOpportunity(prio);
+    assertEquals(NodeType.OFF_SWITCH, schedulerApp.getAllowedLocalityLevel(
+        prio, 10, nodeLocalityThreshold, rackLocalityThreshold));
+  }
+
+  @Test
+  public void testDelaySchedulingForContinuousScheduling()
+          throws InterruptedException {
+    FSLeafQueue queue = scheduler.getQueueManager().getLeafQueue("queue", true);
+    Priority prio = Mockito.mock(Priority.class);
+    Mockito.when(prio.getPriority()).thenReturn(1);
+
+    MockClock clock = new MockClock();
+    scheduler.setClock(clock);
+
+    long nodeLocalityDelayMs = 5 * 1000L;    // 5 seconds
+    long rackLocalityDelayMs = 6 * 1000L;    // 6 seconds
+
+    RMContext rmContext = resourceManager.getRMContext();
+    ApplicationAttemptId applicationAttemptId = createAppAttemptId(1, 1);
+    FSAppAttempt schedulerApp =
+            new FSAppAttempt(scheduler, applicationAttemptId, "user1", queue,
+                    null, rmContext);
+
+    // Default level should be node-local
+    assertEquals(NodeType.NODE_LOCAL,
+            schedulerApp.getAllowedLocalityLevelByTime(prio,
+                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));
+
+    // after 4 seconds should remain node local
+    clock.tick(4);
+    assertEquals(NodeType.NODE_LOCAL,
+            schedulerApp.getAllowedLocalityLevelByTime(prio,
+                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));
+
+    // after 6 seconds should switch to rack local
+    clock.tick(2);
+    assertEquals(NodeType.RACK_LOCAL,
+            schedulerApp.getAllowedLocalityLevelByTime(prio,
+                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));
+
+    // manually set back to node local
+    schedulerApp.resetAllowedLocalityLevel(prio, NodeType.NODE_LOCAL);
+    schedulerApp.resetSchedulingOpportunities(prio, clock.getTime());
+    assertEquals(NodeType.NODE_LOCAL,
+            schedulerApp.getAllowedLocalityLevelByTime(prio,
+                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));
+
+    // Now escalate again to rack-local, then to off-switch
+    clock.tick(6);
+    assertEquals(NodeType.RACK_LOCAL,
+            schedulerApp.getAllowedLocalityLevelByTime(prio,
+                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));
+
+    clock.tick(7);
+    assertEquals(NodeType.OFF_SWITCH,
+            schedulerApp.getAllowedLocalityLevelByTime(prio,
+                    nodeLocalityDelayMs, rackLocalityDelayMs, clock.getTime()));
+  }
+
+  @Test
+  /**
+   * Ensure that when negative paramaters are given (signaling delay scheduling
+   * no tin use), the least restrictive locality level is returned.
+   */
+  public void testLocalityLevelWithoutDelays() {
+    FSLeafQueue queue = Mockito.mock(FSLeafQueue.class);
+    Priority prio = Mockito.mock(Priority.class);
+    Mockito.when(prio.getPriority()).thenReturn(1);
+
+    RMContext rmContext = resourceManager.getRMContext();
+    ApplicationAttemptId applicationAttemptId = createAppAttemptId(1, 1);
+    FSAppAttempt schedulerApp =
+        new FSAppAttempt(scheduler, applicationAttemptId, "user1", queue ,
+            null, rmContext);
+    assertEquals(NodeType.OFF_SWITCH, schedulerApp.getAllowedLocalityLevel(
+        prio, 10, -1.0, -1.0));
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFSLeafQueue.java

@@ -62,7 +62,7 @@ public class TestFSLeafQueue {
 
   @Test
   public void testUpdateDemand() {
-    AppSchedulable app = mock(AppSchedulable.class);
+    FSAppAttempt app = mock(FSAppAttempt.class);
     Mockito.when(app.getDemand()).thenReturn(maxResource);
 
     schedulable.addAppSchedulable(app);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairScheduler.java

@@ -58,7 +58,6 @@ import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext;
 import org.apache.hadoop.yarn.api.records.Container;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
-import org.apache.hadoop.yarn.api.records.ContainerStatus;
 import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.Priority;
@@ -82,13 +81,11 @@ import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppState;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptState;
 import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer;
-import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerEventType;
 import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.AbstractYarnScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.QueueMetrics;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApplicationAttempt;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode;
-import org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerUtils;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.TestSchedulerUtils;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.AppAddedSchedulerEvent;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.AppAttemptAddedSchedulerEvent;
@@ -1539,7 +1536,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     NodeUpdateSchedulerEvent updateEvent = new NodeUpdateSchedulerEvent(node1);
     scheduler.handle(updateEvent);
     
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId);
     assertEquals(1, app.getLiveContainers().size());
     
     ContainerId containerId = scheduler.getSchedulerApp(attId)
@@ -1613,9 +1610,9 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId2 = createSchedulingRequest(1024, "queue1",
         "norealuserhasthisname2", 1);
 
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(attId1);
     assertNotNull("The application was not allowed", app1);
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(attId2);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(attId2);
     assertNull("The application was allowed", app2);
   }
   
@@ -1688,8 +1685,8 @@ public class TestFairScheduler extends FairSchedulerTestBase {
         "user1", 2);
     ApplicationAttemptId attId2 = createSchedulingRequest(1024, "queue1",
         "user1", 2);
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(attId1);
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(attId2);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(attId2);
     
     FSLeafQueue queue1 = scheduler.getQueueManager().getLeafQueue("queue1", true);
     queue1.setPolicy(new FifoPolicy());
@@ -1731,7 +1728,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
 
     ApplicationAttemptId attId =
         createSchedulingRequest(1024, "root.default", "user", 8);
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId);
 
     // set maxAssign to 2: only 2 containers should be allocated
     scheduler.maxAssign = 2;
@@ -1766,7 +1763,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
 
     ApplicationAttemptId attId =
         createSchedulingRequest(0, 1, "root.default", "user", 8);
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId);
 
     // set maxAssign to 2: only 2 containers should be allocated
     scheduler.maxAssign = 2;
@@ -1830,10 +1827,10 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId4 =
         createSchedulingRequest(1024, fifoQueue, user, 4);
 
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(attId1);
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(attId2);
-    FSSchedulerApp app3 = scheduler.getSchedulerApp(attId3);
-    FSSchedulerApp app4 = scheduler.getSchedulerApp(attId4);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(attId2);
+    FSAppAttempt app3 = scheduler.getSchedulerApp(attId3);
+    FSAppAttempt app4 = scheduler.getSchedulerApp(attId4);
 
     scheduler.getQueueManager().getLeafQueue(fifoQueue, true)
         .setPolicy(SchedulingPolicy.parse("fifo"));
@@ -1952,7 +1949,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     NodeUpdateSchedulerEvent updateEvent = new NodeUpdateSchedulerEvent(node1);
     scheduler.handle(updateEvent);
     
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId);
     assertEquals(0, app.getLiveContainers().size());
     assertEquals(0, app.getReservedContainers().size());
     
@@ -2025,7 +2022,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     NodeUpdateSchedulerEvent node2UpdateEvent = new NodeUpdateSchedulerEvent(node2);
 
     // no matter how many heartbeats, node2 should never get a container
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId1);
     for (int i = 0; i < 10; i++) {
       scheduler.handle(node2UpdateEvent);
       assertEquals(0, app.getLiveContainers().size());
@@ -2066,7 +2063,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     NodeUpdateSchedulerEvent node2UpdateEvent = new NodeUpdateSchedulerEvent(node2);
 
     // no matter how many heartbeats, node2 should never get a container
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId1);
     for (int i = 0; i < 10; i++) {
       scheduler.handle(node2UpdateEvent);
       assertEquals(0, app.getLiveContainers().size());
@@ -2101,7 +2098,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
 
     ApplicationAttemptId attId = createSchedulingRequest(1024, "queue1",
         "user1", 0);
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId);
     
     ResourceRequest nodeRequest = createResourceRequest(1024, node2.getHostName(), 1, 2, true);
     ResourceRequest rackRequest = createResourceRequest(1024, "rack1", 1, 2, true);
@@ -2143,7 +2140,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     
     ApplicationAttemptId attId = createSchedulingRequest(1024, 1, "default",
         "user1", 2);
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId);
     scheduler.update();
 
     NodeUpdateSchedulerEvent updateEvent = new NodeUpdateSchedulerEvent(node1);
@@ -2165,10 +2162,10 @@ public class TestFairScheduler extends FairSchedulerTestBase {
 
     ApplicationAttemptId appAttId1 = createSchedulingRequest(2048, 1, "queue1",
         "user1", 2);
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(appAttId1);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(appAttId1);
     ApplicationAttemptId appAttId2 = createSchedulingRequest(1024, 2, "queue1",
         "user1", 2);
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(appAttId2);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(appAttId2);
 
     DominantResourceFairnessPolicy drfPolicy = new DominantResourceFairnessPolicy();
     drfPolicy.initialize(scheduler.getClusterResource());
@@ -2208,13 +2205,13 @@ public class TestFairScheduler extends FairSchedulerTestBase {
 
     ApplicationAttemptId appAttId1 = createSchedulingRequest(3072, 1, "queue1",
         "user1", 2);
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(appAttId1);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(appAttId1);
     ApplicationAttemptId appAttId2 = createSchedulingRequest(2048, 2, "queue1",
         "user1", 2);
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(appAttId2);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(appAttId2);
     ApplicationAttemptId appAttId3 = createSchedulingRequest(1024, 2, "queue2",
         "user1", 2);
-    FSSchedulerApp app3 = scheduler.getSchedulerApp(appAttId3);
+    FSAppAttempt app3 = scheduler.getSchedulerApp(appAttId3);
     
     DominantResourceFairnessPolicy drfPolicy = new DominantResourceFairnessPolicy();
     drfPolicy.initialize(scheduler.getClusterResource());
@@ -2247,19 +2244,19 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId appAttId1 = createSchedulingRequest(3074, 1, "queue1.subqueue1",
         "user1", 2);
     Thread.sleep(3); // so that start times will be different
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(appAttId1);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(appAttId1);
     ApplicationAttemptId appAttId2 = createSchedulingRequest(1024, 3, "queue1.subqueue1",
         "user1", 2);
     Thread.sleep(3); // so that start times will be different
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(appAttId2);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(appAttId2);
     ApplicationAttemptId appAttId3 = createSchedulingRequest(2048, 2, "queue1.subqueue2",
         "user1", 2);
     Thread.sleep(3); // so that start times will be different
-    FSSchedulerApp app3 = scheduler.getSchedulerApp(appAttId3);
+    FSAppAttempt app3 = scheduler.getSchedulerApp(appAttId3);
     ApplicationAttemptId appAttId4 = createSchedulingRequest(1024, 2, "queue2",
         "user1", 2);
     Thread.sleep(3); // so that start times will be different
-    FSSchedulerApp app4 = scheduler.getSchedulerApp(appAttId4);
+    FSAppAttempt app4 = scheduler.getSchedulerApp(appAttId4);
     
     DominantResourceFairnessPolicy drfPolicy = new DominantResourceFairnessPolicy();
     drfPolicy.initialize(scheduler.getClusterResource());
@@ -2341,7 +2338,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
         NodeUpdateSchedulerEvent(node2);
 
     // no matter how many heartbeats, node2 should never get a container  
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId1);
     for (int i = 0; i < 10; i++) {
       scheduler.handle(node2UpdateEvent);
       assertEquals(0, app.getLiveContainers().size());
@@ -2353,14 +2350,14 @@ public class TestFairScheduler extends FairSchedulerTestBase {
   }
 
   private void verifyAppRunnable(ApplicationAttemptId attId, boolean runnable) {
-    FSSchedulerApp app = scheduler.getSchedulerApp(attId);
+    FSAppAttempt app = scheduler.getSchedulerApp(attId);
     FSLeafQueue queue = app.getQueue();
-    Collection<AppSchedulable> runnableApps =
+    Collection<FSAppAttempt> runnableApps =
         queue.getRunnableAppSchedulables();
-    Collection<AppSchedulable> nonRunnableApps =
+    Collection<FSAppAttempt> nonRunnableApps =
         queue.getNonRunnableAppSchedulables();
-    assertEquals(runnable, runnableApps.contains(app.getAppSchedulable()));
-    assertEquals(!runnable, nonRunnableApps.contains(app.getAppSchedulable()));
+    assertEquals(runnable, runnableApps.contains(app));
+    assertEquals(!runnable, nonRunnableApps.contains(app));
   }
   
   private void verifyQueueNumRunnable(String queueName, int numRunnableInQueue,
@@ -2465,7 +2462,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId1 = createAppAttemptId(1, 1);
     createApplicationWithAMResource(attId1, "queue1", "user1", amResource1);
     createSchedulingRequestExistingApplication(1024, 1, amPriority, attId1);
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(attId1);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application1's AM requests 1024 MB memory",
@@ -2479,7 +2476,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId2 = createAppAttemptId(2, 1);
     createApplicationWithAMResource(attId2, "queue1", "user1", amResource1);
     createSchedulingRequestExistingApplication(1024, 1, amPriority, attId2);
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(attId2);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(attId2);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application2's AM requests 1024 MB memory",
@@ -2493,7 +2490,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId3 = createAppAttemptId(3, 1);
     createApplicationWithAMResource(attId3, "queue1", "user1", amResource1);
     createSchedulingRequestExistingApplication(1024, 1, amPriority, attId3);
-    FSSchedulerApp app3 = scheduler.getSchedulerApp(attId3);
+    FSAppAttempt app3 = scheduler.getSchedulerApp(attId3);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application3's AM requests 1024 MB memory",
@@ -2529,7 +2526,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId4 = createAppAttemptId(4, 1);
     createApplicationWithAMResource(attId4, "queue1", "user1", amResource2);
     createSchedulingRequestExistingApplication(2048, 2, amPriority, attId4);
-    FSSchedulerApp app4 = scheduler.getSchedulerApp(attId4);
+    FSAppAttempt app4 = scheduler.getSchedulerApp(attId4);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application4's AM requests 2048 MB memory",
@@ -2543,7 +2540,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId5 = createAppAttemptId(5, 1);
     createApplicationWithAMResource(attId5, "queue1", "user1", amResource2);
     createSchedulingRequestExistingApplication(2048, 2, amPriority, attId5);
-    FSSchedulerApp app5 = scheduler.getSchedulerApp(attId5);
+    FSAppAttempt app5 = scheduler.getSchedulerApp(attId5);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application5's AM requests 2048 MB memory",
@@ -2586,7 +2583,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId6 = createAppAttemptId(6, 1);
     createApplicationWithAMResource(attId6, "queue1", "user1", amResource3);
     createSchedulingRequestExistingApplication(1860, 2, amPriority, attId6);
-    FSSchedulerApp app6 = scheduler.getSchedulerApp(attId6);
+    FSAppAttempt app6 = scheduler.getSchedulerApp(attId6);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application6's AM should not be running",
@@ -2677,7 +2674,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId1 = createAppAttemptId(1, 1);
     createApplicationWithAMResource(attId1, "queue1", "test1", amResource1);
     createSchedulingRequestExistingApplication(2048, 1, amPriority, attId1);
-    FSSchedulerApp app1 = scheduler.getSchedulerApp(attId1);
+    FSAppAttempt app1 = scheduler.getSchedulerApp(attId1);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application1's AM requests 2048 MB memory",
@@ -2691,7 +2688,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId attId2 = createAppAttemptId(2, 1);
     createApplicationWithAMResource(attId2, "queue2", "test1", amResource1);
     createSchedulingRequestExistingApplication(2048, 1, amPriority, attId2);
-    FSSchedulerApp app2 = scheduler.getSchedulerApp(attId2);
+    FSAppAttempt app2 = scheduler.getSchedulerApp(attId2);
     scheduler.update();
     scheduler.handle(updateEvent);
     assertEquals("Application2's AM requests 2048 MB memory",
@@ -2823,7 +2820,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     // at least one pass
     Thread.sleep(fs.getConf().getContinuousSchedulingSleepMs() + 500);
 
-    FSSchedulerApp app = fs.getSchedulerApp(appAttemptId);
+    FSAppAttempt app = fs.getSchedulerApp(appAttemptId);
     // Wait until app gets resources.
     while (app.getCurrentConsumption().equals(Resources.none())) { }
 
@@ -3007,7 +3004,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
 
     assertEquals(1, scheduler.getSchedulerApp(appAttemptId).getLiveContainers()
         .size());
-    FSSchedulerApp app = scheduler.getSchedulerApp(appAttemptId);
+    FSAppAttempt app = scheduler.getSchedulerApp(appAttemptId);
 
     // ResourceRequest will be empty once NodeUpdate is completed
     Assert.assertNull(app.getResourceRequest(priority, host));
@@ -3063,7 +3060,7 @@ public class TestFairScheduler extends FairSchedulerTestBase {
 
     ApplicationAttemptId appAttemptId =
         createSchedulingRequest(GB, "root.default", "user", 1);
-    FSSchedulerApp app = scheduler.getSchedulerApp(appAttemptId);
+    FSAppAttempt app = scheduler.getSchedulerApp(appAttemptId);
 
     // Verify the blacklist can be updated independent of requesting containers
     scheduler.allocate(appAttemptId, Collections.<ResourceRequest>emptyList(),
@@ -3171,12 +3168,10 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     assertEquals(Resource.newInstance(3072, 3), oldQueue.getDemand());
     
     scheduler.moveApplication(appId, "queue2");
-    FSSchedulerApp app = scheduler.getSchedulerApp(appAttId);
+    FSAppAttempt app = scheduler.getSchedulerApp(appAttId);
     assertSame(targetQueue, app.getQueue());
-    assertFalse(oldQueue.getRunnableAppSchedulables()
-        .contains(app.getAppSchedulable()));
-    assertTrue(targetQueue.getRunnableAppSchedulables()
-        .contains(app.getAppSchedulable()));
+    assertFalse(oldQueue.getRunnableAppSchedulables().contains(app));
+    assertTrue(targetQueue.getRunnableAppSchedulables().contains(app));
     assertEquals(Resource.newInstance(0, 0), oldQueue.getResourceUsage());
     assertEquals(Resource.newInstance(1024, 1), targetQueue.getResourceUsage());
     assertEquals(0, oldQueue.getNumRunnableApps());
@@ -3224,17 +3219,13 @@ public class TestFairScheduler extends FairSchedulerTestBase {
     ApplicationAttemptId appAttId =
         createSchedulingRequest(1024, 1, "queue1", "user1", 3);
     
-    FSSchedulerApp app = scheduler.getSchedulerApp(appAttId);
-    assertTrue(oldQueue.getNonRunnableAppSchedulables()
-        .contains(app.getAppSchedulable()));
+    FSAppAttempt app = scheduler.getSchedulerApp(appAttId);
+    assertTrue(oldQueue.getNonRunnableAppSchedulables().contains(app));
     
     scheduler.moveApplication(appAttId.getApplicationId(), "queue2");
-    assertFalse(oldQueue.getNonRunnableAppSchedulables()
-        .contains(app.getAppSchedulable()));
-    assertFalse(targetQueue.getNonRunnableAppSchedulables()
-        .contains(app.getAppSchedulable()));
-    assertTrue(targetQueue.getRunnableAppSchedulables()
-        .contains(app.getAppSchedulable()));
+    assertFalse(oldQueue.getNonRunnableAppSchedulables().contains(app));
+    assertFalse(targetQueue.getNonRunnableAppSchedulables().contains(app));
+    assertTrue(targetQueue.getRunnableAppSchedulables().contains(app));
     assertEquals(1, targetQueue.getNumRunnableApps());
     assertEquals(1, queueMgr.getRootQueue().getNumRunnableApps());
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestMaxRunningAppsEnforcer.java

@@ -42,12 +42,13 @@ public class TestMaxRunningAppsEnforcer {
   private int appNum;
   private TestFairScheduler.MockClock clock;
   private RMContext rmContext;
+  private FairScheduler scheduler;
   
   @Before
   public void setup() throws Exception {
     Configuration conf = new Configuration();
     clock = new TestFairScheduler.MockClock();
-    FairScheduler scheduler = mock(FairScheduler.class);
+    scheduler = mock(FairScheduler.class);
     when(scheduler.getConf()).thenReturn(
         new FairSchedulerConfiguration(conf));
     when(scheduler.getClock()).thenReturn(clock);
@@ -65,11 +66,11 @@ public class TestMaxRunningAppsEnforcer {
     when(rmContext.getEpoch()).thenReturn(0);
   }
   
-  private FSSchedulerApp addApp(FSLeafQueue queue, String user) {
+  private FSAppAttempt addApp(FSLeafQueue queue, String user) {
     ApplicationId appId = ApplicationId.newInstance(0l, appNum++);
     ApplicationAttemptId attId = ApplicationAttemptId.newInstance(appId, 0);
     boolean runnable = maxAppsEnforcer.canAppBeRunnable(queue, user);
-    FSSchedulerApp app = new FSSchedulerApp(attId, user, queue, null,
+    FSAppAttempt app = new FSAppAttempt(scheduler, attId, user, queue, null,
         rmContext);
     queue.addApp(app, runnable);
     if (runnable) {
@@ -80,7 +81,7 @@ public class TestMaxRunningAppsEnforcer {
     return app;
   }
   
-  private void removeApp(FSSchedulerApp app) {
+  private void removeApp(FSAppAttempt app) {
     app.getQueue().removeApp(app);
     maxAppsEnforcer.untrackRunnableApp(app);
     maxAppsEnforcer.updateRunnabilityOnAppRemoval(app, app.getQueue());
@@ -93,7 +94,7 @@ public class TestMaxRunningAppsEnforcer {
     queueMaxApps.put("root", 2);
     queueMaxApps.put("root.queue1", 1);
     queueMaxApps.put("root.queue2", 1);
-    FSSchedulerApp app1 = addApp(leaf1, "user");
+    FSAppAttempt app1 = addApp(leaf1, "user");
     addApp(leaf2, "user");
     addApp(leaf2, "user");
     assertEquals(1, leaf1.getRunnableAppSchedulables().size());
@@ -110,7 +111,7 @@ public class TestMaxRunningAppsEnforcer {
     FSLeafQueue leaf1 = queueManager.getLeafQueue("root.queue1.subqueue1.leaf1", true);
     FSLeafQueue leaf2 = queueManager.getLeafQueue("root.queue1.subqueue2.leaf2", true);
     queueMaxApps.put("root.queue1", 2);
-    FSSchedulerApp app1 = addApp(leaf1, "user");
+    FSAppAttempt app1 = addApp(leaf1, "user");
     addApp(leaf2, "user");
     addApp(leaf2, "user");
     assertEquals(1, leaf1.getRunnableAppSchedulables().size());
@@ -128,7 +129,7 @@ public class TestMaxRunningAppsEnforcer {
     FSLeafQueue leaf2 = queueManager.getLeafQueue("root.queue1.leaf2", true);
     queueMaxApps.put("root.queue1.leaf1", 2);
     userMaxApps.put("user1", 1);
-    FSSchedulerApp app1 = addApp(leaf1, "user1");
+    FSAppAttempt app1 = addApp(leaf1, "user1");
     addApp(leaf1, "user2");
     addApp(leaf1, "user3");
     addApp(leaf2, "user1");
@@ -147,7 +148,7 @@ public class TestMaxRunningAppsEnforcer {
     FSLeafQueue leaf1 = queueManager.getLeafQueue("root.queue1.subqueue1.leaf1", true);
     FSLeafQueue leaf2 = queueManager.getLeafQueue("root.queue1.subqueue2.leaf2", true);
     queueMaxApps.put("root.queue1", 2);
-    FSSchedulerApp app1 = addApp(leaf1, "user");
+    FSAppAttempt app1 = addApp(leaf1, "user");
     addApp(leaf2, "user");
     addApp(leaf2, "user");
     clock.tick(20);
@@ -167,7 +168,7 @@ public class TestMaxRunningAppsEnforcer {
     FSLeafQueue leaf1 = queueManager.getLeafQueue("root.queue1.subqueue1.leaf1", true);
     FSLeafQueue leaf2 = queueManager.getLeafQueue("root.queue1.subqueue2.leaf2", true);
     queueMaxApps.put("root.queue1", 2);
-    FSSchedulerApp app1 = addApp(leaf1, "user");
+    FSAppAttempt app1 = addApp(leaf1, "user");
     addApp(leaf2, "user");
     addApp(leaf2, "user");
     addApp(leaf2, "user");
@@ -182,21 +183,18 @@ public class TestMaxRunningAppsEnforcer {
   
   @Test
   public void testMultiListStartTimeIteratorEmptyAppLists() {
-    List<List<AppSchedulable>> lists = new ArrayList<List<AppSchedulable>>();
-    lists.add(Arrays.asList(mockAppSched(1)));
-    lists.add(Arrays.asList(mockAppSched(2)));
-    Iterator<FSSchedulerApp> iter =
+    List<List<FSAppAttempt>> lists = new ArrayList<List<FSAppAttempt>>();
+    lists.add(Arrays.asList(mockAppAttempt(1)));
+    lists.add(Arrays.asList(mockAppAttempt(2)));
+    Iterator<FSAppAttempt> iter =
         new MaxRunningAppsEnforcer.MultiListStartTimeIterator(lists);
-    assertEquals(1, iter.next().getAppSchedulable().getStartTime());
-    assertEquals(2, iter.next().getAppSchedulable().getStartTime());
+    assertEquals(1, iter.next().getStartTime());
+    assertEquals(2, iter.next().getStartTime());
   }
   
-  private AppSchedulable mockAppSched(long startTime) {
-    AppSchedulable appSched = mock(AppSchedulable.class);
-    when(appSched.getStartTime()).thenReturn(startTime);
-    FSSchedulerApp schedApp = mock(FSSchedulerApp.class);
-    when(schedApp.getAppSchedulable()).thenReturn(appSched);
-    when(appSched.getApp()).thenReturn(schedApp);
-    return appSched;
+  private FSAppAttempt mockAppAttempt(long startTime) {
+    FSAppAttempt schedApp = mock(FSAppAttempt.class);
+    when(schedApp.getStartTime()).thenReturn(startTime);
+    return schedApp;
   }
 }