YARN-4304. AM max resource configuration per partition to be displayed/updated correctly in UI and in various partition related metrics. (Sunil G via wangda)

hadoop-yarn-project/CHANGES.txt

@@ -706,6 +706,9 @@ Release 2.8.0 - UNRELEASED
     YARN-4582. Label-related invalid resource request exception should be able to 
     properly handled by application. (Bibin A Chundatt via wangda)
 
+    YARN-4304. AM max resource configuration per partition to be displayed/updated
+    correctly in UI and in various partition related metrics. (Sunil G via wangda)
+
   OPTIMIZATIONS
 
     YARN-3339. TestDockerContainerExecutor should pull a single image and not

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/AbstractCSQueue.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity;
 
 import java.io.IOException;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
@@ -612,4 +613,27 @@ public abstract class AbstractCSQueue implements CSQueue {
     // TODO add dummy implementation
     return null;
   }
+
+  @Override
+  public Set<String> getNodeLabelsForQueue() {
+    // if queue's label is *, queue can access any labels. Instead of
+    // considering all labels in cluster, only those labels which are
+    // use some resource of this queue can be considered.
+    Set<String> nodeLabels = new HashSet<String>();
+    if (this.getAccessibleNodeLabels() != null
+        && this.getAccessibleNodeLabels().contains(RMNodeLabelsManager.ANY)) {
+      nodeLabels.addAll(Sets.union(this.getQueueCapacities()
+          .getNodePartitionsSet(), this.getQueueResourceUsage()
+          .getNodePartitionsSet()));
+    } else {
+      nodeLabels.addAll(this.getAccessibleNodeLabels());
+    }
+
+    // Add NO_LABEL also to this list as NO_LABEL also can be granted with
+    // resource in many general cases.
+    if (!nodeLabels.contains(RMNodeLabelsManager.NO_LABEL)) {
+      nodeLabels.add(RMNodeLabelsManager.NO_LABEL);
+    }
+    return nodeLabels;
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CSQueue.java

@@ -21,6 +21,7 @@ package org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity;
 import java.io.IOException;
 import java.util.Collection;
 import java.util.List;
+import java.util.Set;
 
 import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceStability.Stable;
@@ -332,4 +333,10 @@ extends org.apache.hadoop.yarn.server.resourcemanager.scheduler.Queue {
   public void decreaseContainer(Resource clusterResource,
       SchedContainerChangeRequest decreaseRequest,
       FiCaSchedulerApp app);
+
+  /**
+   * Get valid Node Labels for this queue
+   * @return valid node labels
+   */
+  public Set<String> getNodeLabelsForQueue();
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/LeafQueue.java

@@ -528,10 +528,20 @@ public class LeafQueue extends AbstractCSQueue {
 
   }
   
-  public synchronized Resource getAMResourceLimit() {
-    return getAMResourceLimitPerPartition(RMNodeLabelsManager.NO_LABEL);
+  public Resource getAMResourceLimit() {
+    return queueUsage.getAMLimit();
   }
 
+  public Resource getAMResourceLimitPerPartition(String nodePartition) {
+    return queueUsage.getAMLimit(nodePartition);
+  }
+
+  public synchronized Resource calculateAndGetAMResourceLimit() {
+    return calculateAndGetAMResourceLimitPerPartition(
+        RMNodeLabelsManager.NO_LABEL);
+  }
+
+  @VisibleForTesting
   public synchronized Resource getUserAMResourceLimit() {
      return getUserAMResourceLimitPerPartition(RMNodeLabelsManager.NO_LABEL);
   }
@@ -552,13 +562,17 @@ public class LeafQueue extends AbstractCSQueue {
         labelManager.getResourceByLabel(nodePartition, lastClusterResource),
         queueCapacities.getAbsoluteCapacity(nodePartition), minimumAllocation);
 
-    return Resources.multiplyAndNormalizeUp(resourceCalculator,
+    Resource userAMLimit = Resources.multiplyAndNormalizeUp(resourceCalculator,
         queuePartitionResource,
         queueCapacities.getMaxAMResourcePercentage(nodePartition)
             * effectiveUserLimit * userLimitFactor, minimumAllocation);
+    return Resources.lessThanOrEqual(resourceCalculator, lastClusterResource,
+        userAMLimit, getAMResourceLimitPerPartition(nodePartition))
+        ? userAMLimit
+        : getAMResourceLimitPerPartition(nodePartition);
   }
 
-  public synchronized Resource getAMResourceLimitPerPartition(
+  public synchronized Resource calculateAndGetAMResourceLimitPerPartition(
       String nodePartition) {
     /*
      * For non-labeled partition, get the max value from resources currently
@@ -601,20 +615,26 @@ public class LeafQueue extends AbstractCSQueue {
 
   private synchronized void activateApplications() {
     // limit of allowed resource usage for application masters
-    Map<String, Resource> amPartitionLimit = new HashMap<String, Resource>();
     Map<String, Resource> userAmPartitionLimit =
         new HashMap<String, Resource>();
 
+    // AM Resource Limit for accessible labels can be pre-calculated.
+    // This will help in updating AMResourceLimit for all labels when queue
+    // is initialized for the first time (when no applications are present).
+    for (String nodePartition : getNodeLabelsForQueue()) {
+      calculateAndGetAMResourceLimitPerPartition(nodePartition);
+    }
+
     activateApplications(getPendingAppsOrderingPolicyRecovery()
-        .getAssignmentIterator(), amPartitionLimit, userAmPartitionLimit);
+        .getAssignmentIterator(), userAmPartitionLimit);
 
     activateApplications(
         getPendingAppsOrderingPolicy().getAssignmentIterator(),
-        amPartitionLimit, userAmPartitionLimit);
+        userAmPartitionLimit);
   }
 
   private synchronized void activateApplications(
-      Iterator<FiCaSchedulerApp> fsApp, Map<String, Resource> amPartitionLimit,
+      Iterator<FiCaSchedulerApp> fsApp,
       Map<String, Resource> userAmPartitionLimit) {
     while (fsApp.hasNext()) {
       FiCaSchedulerApp application = fsApp.next();
@@ -624,11 +644,10 @@ public class LeafQueue extends AbstractCSQueue {
       // and calculate max-am resource limit for this partition.
       String partitionName = application.getAppAMNodePartitionName();
 
-      Resource amLimit = amPartitionLimit.get(partitionName);
+      Resource amLimit = getAMResourceLimitPerPartition(partitionName);
       // Verify whether we already calculated am-limit for this label.
       if (amLimit == null) {
-        amLimit = getAMResourceLimitPerPartition(partitionName);
-        amPartitionLimit.put(partitionName, amLimit);
+        amLimit = calculateAndGetAMResourceLimitPerPartition(partitionName);
       }
       // Check am resource limit.
       Resource amIfStarted = Resources.add(
@@ -705,6 +724,7 @@ public class LeafQueue extends AbstractCSQueue {
           application.getAMResource(partitionName));
       user.getResourceUsage().incAMUsed(partitionName,
           application.getAMResource(partitionName));
+      user.getResourceUsage().setAMLimit(partitionName, userAMLimit);
       metrics.incAMUsed(application.getUser(),
           application.getAMResource(partitionName));
       metrics.setAMResouceLimitForUser(application.getUser(), userAMLimit);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/UserInfo.java

@@ -25,7 +25,7 @@ import javax.xml.bind.annotation.XmlRootElement;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceUsage;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ResourceInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ResourceUsageInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ResourcesInfo;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -36,7 +36,7 @@ public class UserInfo {
   protected int numActiveApplications;
   protected ResourceInfo AMResourceUsed;
   protected ResourceInfo userResourceLimit;
-  protected ResourceUsageInfo resources;
+  protected ResourcesInfo resources;
 
   UserInfo() {}
 
@@ -48,7 +48,7 @@ public class UserInfo {
     this.numPendingApplications = pendingApps;
     this.AMResourceUsed = new ResourceInfo(amResUsed);
     this.userResourceLimit = new ResourceInfo(resourceLimit);
-    this.resources = new ResourceUsageInfo(resourceUsage);
+    this.resources = new ResourcesInfo(resourceUsage);
   }
 
   public String getUsername() {
@@ -75,7 +75,7 @@ public class UserInfo {
     return userResourceLimit;
   }
 
-  public ResourceUsageInfo getResourceUsageInfo() {
+  public ResourcesInfo getResourceUsageInfo() {
     return resources;
   }
 }

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

@@ -39,10 +39,11 @@ import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.CapacitySchedule
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.CapacitySchedulerLeafQueueInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.CapacitySchedulerQueueInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.PartitionQueueCapacitiesInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.PartitionResourceUsageInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.PartitionResourcesInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ResourceInfo;
 import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
 import org.apache.hadoop.yarn.util.Times;
+import org.apache.hadoop.yarn.util.resource.Resources;
 import org.apache.hadoop.yarn.webapp.ResponseInfo;
 import org.apache.hadoop.yarn.webapp.SubView;
 import org.apache.hadoop.yarn.webapp.hamlet.Hamlet;
@@ -134,8 +135,23 @@ class CapacitySchedulerPage extends RmView {
     private void renderQueueCapacityInfo(ResponseInfo ri, String label) {
       PartitionQueueCapacitiesInfo capacities =
           lqinfo.getCapacities().getPartitionQueueCapacitiesInfo(label);
-      PartitionResourceUsageInfo resourceUsages =
+      PartitionResourcesInfo resourceUsages =
           lqinfo.getResources().getPartitionResourceUsageInfo(label);
+
+      // Get UserInfo from first user to calculate AM Resource Limit per user.
+      ResourceInfo userAMResourceLimit = null;
+      ArrayList<UserInfo> usersList = lqinfo.getUsers().getUsersList();
+      if (usersList.isEmpty()) {
+        // If no users are present, consider AM Limit for that queue.
+        userAMResourceLimit = resourceUsages.getAMLimit();
+      } else {
+        userAMResourceLimit = usersList.get(0)
+            .getResourceUsageInfo().getPartitionResourceUsageInfo(label)
+            .getAMLimit();
+      }
+      ResourceInfo amUsed = (resourceUsages.getAmUsed() == null)
+          ? new ResourceInfo(Resources.none())
+          : resourceUsages.getAmUsed();
       ri.
       _("Used Capacity:", percent(capacities.getUsedCapacity() / 100)).
       _("Configured Capacity:", percent(capacities.getCapacity() / 100)).
@@ -143,7 +159,15 @@ class CapacitySchedulerPage extends RmView {
       _("Absolute Used Capacity:", percent(capacities.getAbsoluteUsedCapacity() / 100)).
       _("Absolute Configured Capacity:", percent(capacities.getAbsoluteCapacity() / 100)).
       _("Absolute Configured Max Capacity:", percent(capacities.getAbsoluteMaxCapacity() / 100)).
-      _("Used Resources:", resourceUsages.getUsed().toString());
+      _("Used Resources:", resourceUsages.getUsed().toString()).
+      _("Configured Max Application Master Limit:", StringUtils.format("%.1f",
+          capacities.getMaxAMLimitPercentage())).
+      _("Max Application Master Resources:",
+          resourceUsages.getAMLimit().toString()).
+      _("Used Application Master Resources:",
+          amUsed.toString()).
+      _("Max Application Master Resources Per User:",
+          userAMResourceLimit.toString());
     }
 
     private void renderCommonLeafQueueInfo(ResponseInfo ri) {
@@ -153,9 +177,6 @@ class CapacitySchedulerPage extends RmView {
       _("Num Containers:", Integer.toString(lqinfo.getNumContainers())).
       _("Max Applications:", Integer.toString(lqinfo.getMaxApplications())).
       _("Max Applications Per User:", Integer.toString(lqinfo.getMaxApplicationsPerUser())).
-      _("Max Application Master Resources:", lqinfo.getAMResourceLimit().toString()).
-      _("Used Application Master Resources:", lqinfo.getUsedAMResource().toString()).
-      _("Max Application Master Resources Per User:", lqinfo.getUserAMResourceLimit().toString()).
       _("Configured Minimum User Limit Percent:", Integer.toString(lqinfo.getUserLimit()) + "%").
       _("Configured User Limit Factor:", lqinfo.getUserLimitFactor()).
       _("Accessible Node Labels:", StringUtils.join(",", lqinfo.getNodeLabels())).
@@ -197,15 +218,21 @@ class CapacitySchedulerPage extends RmView {
       ArrayList<UserInfo> users = lqinfo.getUsers().getUsersList();
       for (UserInfo userInfo : users) {
         ResourceInfo resourcesUsed = userInfo.getResourcesUsed();
+        PartitionResourcesInfo resourceUsages = lqinfo
+            .getResources()
+            .getPartitionResourceUsageInfo((nodeLabel == null) ? "" : nodeLabel);
         if (nodeLabel != null) {
           resourcesUsed = userInfo.getResourceUsageInfo()
               .getPartitionResourceUsageInfo(nodeLabel).getUsed();
         }
+        ResourceInfo amUsed = (resourceUsages.getAmUsed() == null)
+            ? new ResourceInfo(Resources.none())
+            : resourceUsages.getAmUsed();
         tbody.tr().td(userInfo.getUsername())
             .td(userInfo.getUserResourceLimit().toString())
             .td(resourcesUsed.toString())
-            .td(lqinfo.getUserAMResourceLimit().toString())
-            .td(userInfo.getAMResourcesUsed().toString())
+            .td(resourceUsages.getAMLimit().toString())
+            .td(amUsed.toString())
             .td(Integer.toString(userInfo.getNumActiveApplications()))
             .td(Integer.toString(userInfo.getNumPendingApplications()))._();
       }

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

@@ -56,7 +56,7 @@ public class CapacitySchedulerInfo extends SchedulerInfo {
       max = 1f;
     this.maxCapacity = max * 100;
 
-    capacities = new QueueCapacitiesInfo(parent.getQueueCapacities());
+    capacities = new QueueCapacitiesInfo(parent.getQueueCapacities(), false);
     queues = getQueues(parent);
     health = new CapacitySchedulerHealthInfo(cs);
   }

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

@@ -17,13 +17,18 @@
  */
 package org.apache.hadoop.yarn.server.resourcemanager.webapp.dao;
 
+import java.util.ArrayList;
+
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlTransient;
 
+import org.apache.hadoop.yarn.server.resourcemanager.nodelabels.RMNodeLabelsManager;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceUsage;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.QueueCapacities;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.UserInfo;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -62,16 +67,30 @@ public class CapacitySchedulerLeafQueueInfo extends CapacitySchedulerQueueInfo {
     userLimitFactor = q.getUserLimitFactor();
     AMResourceLimit = new ResourceInfo(q.getAMResourceLimit());
     usedAMResource = new ResourceInfo(q.getQueueResourceUsage().getAMUsed());
-    userAMResourceLimit = new ResourceInfo(q.getUserAMResourceLimit());
     preemptionDisabled = q.getPreemptionDisabled();
     orderingPolicyInfo = q.getOrderingPolicy().getInfo();
     defaultNodeLabelExpression = q.getDefaultNodeLabelExpression();
     defaultPriority = q.getDefaultApplicationPriority().getPriority();
+    ArrayList<UserInfo> usersList = users.getUsersList();
+    if (usersList.isEmpty()) {
+      // If no users are present, consider AM Limit for that queue.
+      userAMResourceLimit = resources.getPartitionResourceUsageInfo(
+          RMNodeLabelsManager.NO_LABEL).getAMLimit();
+    } else {
+      userAMResourceLimit = usersList.get(0).getResourceUsageInfo()
+          .getPartitionResourceUsageInfo(RMNodeLabelsManager.NO_LABEL)
+          .getAMLimit();
+    }
   }
 
   @Override
   protected void populateQueueResourceUsage(ResourceUsage queueResourceUsage) {
-    resources = new ResourceUsageInfo(queueResourceUsage);
+    resources = new ResourcesInfo(queueResourceUsage);
+  }
+
+  @Override
+  protected void populateQueueCapacities(QueueCapacities qCapacities) {
+    capacities = new QueueCapacitiesInfo(qCapacities);
   }
 
   public int getNumActiveApplications() {

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

@@ -61,7 +61,7 @@ public class CapacitySchedulerQueueInfo {
   protected long reservedContainers;
   protected long pendingContainers;
   protected QueueCapacitiesInfo capacities;
-  protected ResourceUsageInfo resources;
+  protected ResourcesInfo resources;
 
   CapacitySchedulerQueueInfo() {
   };
@@ -101,14 +101,18 @@ public class CapacitySchedulerQueueInfo {
       Collections.sort(nodeLabels);
     }
     QueueCapacities qCapacities = q.getQueueCapacities();
-    capacities = new QueueCapacitiesInfo(qCapacities);
+    populateQueueCapacities(qCapacities);
 
     ResourceUsage queueResourceUsage = q.getQueueResourceUsage();
     populateQueueResourceUsage(queueResourceUsage);
   }
 
   protected void populateQueueResourceUsage(ResourceUsage queueResourceUsage) {
-    resources = new ResourceUsageInfo(queueResourceUsage, false);
+    resources = new ResourcesInfo(queueResourceUsage, false);
+  }
+
+  protected void populateQueueCapacities(QueueCapacities qCapacities) {
+    capacities = new QueueCapacitiesInfo(qCapacities, false);
   }
 
   public float getCapacity() {
@@ -193,7 +197,7 @@ public class CapacitySchedulerQueueInfo {
     return capacities;
   }
 
-  public ResourceUsageInfo getResources() {
+  public ResourcesInfo getResources() {
     return resources;
   }
 }

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

@@ -35,13 +35,14 @@ public class PartitionQueueCapacitiesInfo {
   private float absoluteCapacity;
   private float absoluteUsedCapacity;
   private float absoluteMaxCapacity  = 100;
+  private Float maxAMLimitPercentage;
 
   public PartitionQueueCapacitiesInfo() {
   }
 
   public PartitionQueueCapacitiesInfo(String partitionName, float capacity,
       float usedCapacity, float maxCapacity, float absCapacity,
-      float absUsedCapacity, float absMaxCapacity) {
+      float absUsedCapacity, float absMaxCapacity, Float maxAMLimitPercentage) {
     super();
     this.partitionName = partitionName;
     this.capacity = capacity;
@@ -50,6 +51,7 @@ public class PartitionQueueCapacitiesInfo {
     this.absoluteCapacity = absCapacity;
     this.absoluteUsedCapacity = absUsedCapacity;
     this.absoluteMaxCapacity = absMaxCapacity;
+    this.maxAMLimitPercentage = maxAMLimitPercentage;
   }
 
   public float getCapacity() {
@@ -107,4 +109,12 @@ public class PartitionQueueCapacitiesInfo {
   public void setAbsoluteMaxCapacity(float absoluteMaxCapacity) {
     this.absoluteMaxCapacity = absoluteMaxCapacity;
   }
+
+  public float getMaxAMLimitPercentage() {
+    return maxAMLimitPercentage;
+  }
+
+  public void setMaxAMLimitPercentage(float maxAMLimitPercentage) {
+    this.maxAMLimitPercentage = maxAMLimitPercentage;
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/PartitionResourceUsageInfo.java → hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/PartitionResourcesInfo.java

@@ -26,25 +26,27 @@ import javax.xml.bind.annotation.XmlRootElement;
  */
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
-public class PartitionResourceUsageInfo {
+public class PartitionResourcesInfo {
   private String partitionName;
   private ResourceInfo used = new ResourceInfo();
   private ResourceInfo reserved;
   private ResourceInfo pending;
   private ResourceInfo amUsed;
+  private ResourceInfo amLimit = new ResourceInfo();
 
-  public PartitionResourceUsageInfo() {
+  public PartitionResourcesInfo() {
   }
 
-  public PartitionResourceUsageInfo(String partitionName, ResourceInfo used,
+  public PartitionResourcesInfo(String partitionName, ResourceInfo used,
       ResourceInfo reserved, ResourceInfo pending,
-      ResourceInfo amResourceUsed) {
+      ResourceInfo amResourceUsed, ResourceInfo amResourceLimit) {
     super();
     this.partitionName = partitionName;
     this.used = used;
     this.reserved = reserved;
     this.pending = pending;
     this.amUsed = amResourceUsed;
+    this.amLimit = amResourceLimit;
   }
 
   public String getPartitionName() {
@@ -86,4 +88,12 @@ public class PartitionResourceUsageInfo {
   public void setAmUsed(ResourceInfo amResourceUsed) {
     this.amUsed = amResourceUsed;
   }
+
+  public ResourceInfo getAMLimit() {
+    return amLimit;
+  }
+
+  public void setAMLimit(ResourceInfo amLimit) {
+    this.amLimit = amLimit;
+  }
 }

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

@@ -38,7 +38,8 @@ public class QueueCapacitiesInfo {
   public QueueCapacitiesInfo() {
   }
 
-  public QueueCapacitiesInfo(QueueCapacities capacities) {
+  public QueueCapacitiesInfo(QueueCapacities capacities,
+      boolean considerAMUsage) {
     if (capacities == null) {
       return;
     }
@@ -48,6 +49,7 @@ public class QueueCapacitiesInfo {
     float absCapacity;
     float absUsedCapacity;
     float absMaxCapacity;
+    Float maxAMLimitPercentage;
     for (String partitionName : capacities.getExistingNodeLabels()) {
       usedCapacity = capacities.getUsedCapacity(partitionName) * 100;
       capacity = capacities.getCapacity(partitionName) * 100;
@@ -58,15 +60,22 @@ public class QueueCapacitiesInfo {
           .cap(capacities.getAbsoluteUsedCapacity(partitionName), 0f, 1f) * 100;
       absMaxCapacity = CapacitySchedulerQueueInfo.cap(
           capacities.getAbsoluteMaximumCapacity(partitionName), 0f, 1f) * 100;
+      maxAMLimitPercentage = capacities
+          .getMaxAMResourcePercentage(partitionName) * 100;
       if (maxCapacity < CapacitySchedulerQueueInfo.EPSILON || maxCapacity > 1f)
         maxCapacity = 1f;
       maxCapacity = maxCapacity * 100;
-      queueCapacitiesByPartition.add(
-          new PartitionQueueCapacitiesInfo(partitionName, capacity, usedCapacity,
-              maxCapacity, absCapacity, absUsedCapacity, absMaxCapacity));
+      queueCapacitiesByPartition.add(new PartitionQueueCapacitiesInfo(
+          partitionName, capacity, usedCapacity, maxCapacity, absCapacity,
+          absUsedCapacity, absMaxCapacity,
+          considerAMUsage ? maxAMLimitPercentage : null));
     }
   }
 
+  public QueueCapacitiesInfo(QueueCapacities capacities) {
+    this(capacities, true);
+  }
+
   public void add(PartitionQueueCapacitiesInfo partitionQueueCapacitiesInfo) {
     queueCapacitiesByPartition.add(partitionQueueCapacitiesInfo);
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ResourceUsageInfo.java → hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ResourcesInfo.java

@@ -31,49 +31,51 @@ import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceUsage;
  */
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
-public class ResourceUsageInfo {
-  List<PartitionResourceUsageInfo> resourceUsagesByPartition =
+public class ResourcesInfo {
+  List<PartitionResourcesInfo> resourceUsagesByPartition =
       new ArrayList<>();
 
-  public ResourceUsageInfo() {
+  public ResourcesInfo() {
   }
 
-  public ResourceUsageInfo(ResourceUsage resourceUsage,
+  public ResourcesInfo(ResourceUsage resourceUsage,
       boolean considerAMUsage) {
     if (resourceUsage == null) {
       return;
     }
     for (String partitionName : resourceUsage.getNodePartitionsSet()) {
-      resourceUsagesByPartition.add(new PartitionResourceUsageInfo(
-          partitionName, new ResourceInfo(resourceUsage.getUsed(partitionName)),
+      resourceUsagesByPartition.add(new PartitionResourcesInfo(partitionName,
+          new ResourceInfo(resourceUsage.getUsed(partitionName)),
           new ResourceInfo(resourceUsage.getReserved(partitionName)),
           new ResourceInfo(resourceUsage.getPending(partitionName)),
-          considerAMUsage
-              ? new ResourceInfo(resourceUsage.getAMUsed(partitionName))
-              : null));
+          considerAMUsage ? new ResourceInfo(resourceUsage
+              .getAMUsed(partitionName)) : null,
+          considerAMUsage ? new ResourceInfo(resourceUsage
+              .getAMLimit(partitionName)) : null));
     }
   }
 
-  public ResourceUsageInfo(ResourceUsage resourceUsage) {
+  public ResourcesInfo(ResourceUsage resourceUsage) {
     this(resourceUsage, true);
   }
 
-  public List<PartitionResourceUsageInfo> getPartitionResourceUsages() {
+  public List<PartitionResourcesInfo> getPartitionResourceUsages() {
     return resourceUsagesByPartition;
   }
 
   public void setPartitionResourceUsages(
-      List<PartitionResourceUsageInfo> resources) {
+      List<PartitionResourcesInfo> resources) {
     this.resourceUsagesByPartition = resources;
   }
 
-  public PartitionResourceUsageInfo getPartitionResourceUsageInfo(
+  public PartitionResourcesInfo getPartitionResourceUsageInfo(
       String partitionName) {
-    for (PartitionResourceUsageInfo partitionResourceUsageInfo : resourceUsagesByPartition) {
+    for (PartitionResourcesInfo partitionResourceUsageInfo :
+      resourceUsagesByPartition) {
       if (partitionResourceUsageInfo.getPartitionName().equals(partitionName)) {
         return partitionResourceUsageInfo;
       }
     }
-    return new PartitionResourceUsageInfo();
+    return new PartitionResourcesInfo();
   }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestApplicationLimits.java

@@ -181,7 +181,8 @@ public class TestApplicationLimits {
     ActiveUsersManager activeUsersManager = mock(ActiveUsersManager.class);
     when(queue.getActiveUsersManager()).thenReturn(activeUsersManager);
 
-    assertEquals(Resource.newInstance(8 * GB, 1), queue.getAMResourceLimit());
+    assertEquals(Resource.newInstance(8 * GB, 1),
+        queue.calculateAndGetAMResourceLimit());
     assertEquals(Resource.newInstance(4 * GB, 1),
       queue.getUserAMResourceLimit());
     
@@ -282,8 +283,7 @@ public class TestApplicationLimits {
     		queue.getUserAMResourceLimit());
     
     Resource amResourceLimit = Resource.newInstance(160 * GB, 1);
-    assertEquals(queue.getAMResourceLimit(), amResourceLimit);
-    assertEquals(queue.getAMResourceLimit(), amResourceLimit);
+    assertEquals(queue.calculateAndGetAMResourceLimit(), amResourceLimit);
     assertEquals(queue.getUserAMResourceLimit(), 
       Resource.newInstance(80*GB, 1));
     
@@ -303,7 +303,8 @@ public class TestApplicationLimits {
     root.updateClusterResource(clusterResource, new ResourceLimits(
         clusterResource));
     
-    assertEquals(queue.getAMResourceLimit(), Resource.newInstance(192*GB, 1));
+    assertEquals(queue.calculateAndGetAMResourceLimit(),
+        Resource.newInstance(192 * GB, 1));
     assertEquals(queue.getUserAMResourceLimit(), 
       Resource.newInstance(96*GB, 1));
     
@@ -353,7 +354,8 @@ public class TestApplicationLimits {
           queue.getQueuePath())
         );
     
-    assertEquals(queue.getAMResourceLimit(), Resource.newInstance(800*GB, 1));
+    assertEquals(queue.calculateAndGetAMResourceLimit(),
+        Resource.newInstance(800 * GB, 1));
     assertEquals(queue.getUserAMResourceLimit(), 
       Resource.newInstance(400*GB, 1));
 
@@ -383,7 +385,8 @@ public class TestApplicationLimits {
     final String user_1 = "user_1";
     final String user_2 = "user_2";
     
-    assertEquals(Resource.newInstance(16 * GB, 1), queue.getAMResourceLimit());
+    assertEquals(Resource.newInstance(16 * GB, 1),
+        queue.calculateAndGetAMResourceLimit());
     assertEquals(Resource.newInstance(8 * GB, 1),
       queue.getUserAMResourceLimit());
     

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestLeafQueue.java

@@ -263,18 +263,18 @@ public class TestLeafQueue {
     assertEquals(0.1, c.getMaximumCapacity(), epsilon);
     assertEquals(0.1, c.getAbsoluteMaximumCapacity(), epsilon);
 
-	  //Verify the value for getAMResourceLimit for queues with < .1 maxcap
-	  Resource clusterResource = Resource.newInstance(50 * GB, 50);
-	  
+    // Verify the value for getAMResourceLimit for queues with < .1 maxcap
+    Resource clusterResource = Resource.newInstance(50 * GB, 50);
+
     a.updateClusterResource(clusterResource,
         new ResourceLimits(clusterResource));
-	  assertEquals(Resource.newInstance(1 * GB, 1), 
-	    a.getAMResourceLimit());
-    
-	  b.updateClusterResource(clusterResource,
+    assertEquals(Resource.newInstance(1 * GB, 1),
+        a.calculateAndGetAMResourceLimit());
+
+    b.updateClusterResource(clusterResource,
         new ResourceLimits(clusterResource));
-	  assertEquals(Resource.newInstance(5 * GB, 1), 
-	    b.getAMResourceLimit());
+    assertEquals(Resource.newInstance(5 * GB, 1),
+        b.calculateAndGetAMResourceLimit());
   }
  
   @Test
@@ -2323,21 +2323,24 @@ public class TestLeafQueue {
     csConf.setCapacity(CapacitySchedulerConfiguration.ROOT + "." + A, 80);
     LeafQueue a = new LeafQueue(csContext, A, root, null);
     assertEquals(0.1f, a.getMaxAMResourcePerQueuePercent(), 1e-3f);
-    assertEquals(a.getAMResourceLimit(), Resources.createResource(160 * GB, 1));
+    assertEquals(a.calculateAndGetAMResourceLimit(),
+        Resources.createResource(160 * GB, 1));
     
     csConf.setFloat(CapacitySchedulerConfiguration.
         MAXIMUM_APPLICATION_MASTERS_RESOURCE_PERCENT, 0.2f);
     LeafQueue newA = new LeafQueue(csContext, A, root, null);
     a.reinitialize(newA, clusterResource);
     assertEquals(0.2f, a.getMaxAMResourcePerQueuePercent(), 1e-3f);
-    assertEquals(a.getAMResourceLimit(), Resources.createResource(320 * GB, 1));
+    assertEquals(a.calculateAndGetAMResourceLimit(),
+        Resources.createResource(320 * GB, 1));
 
     Resource newClusterResource = Resources.createResource(100 * 20 * GB,
         100 * 32);
     a.updateClusterResource(newClusterResource, 
         new ResourceLimits(newClusterResource));
     //  100 * 20 * 0.2 = 400
-    assertEquals(a.getAMResourceLimit(), Resources.createResource(400 * GB, 1));
+    assertEquals(a.calculateAndGetAMResourceLimit(),
+        Resources.createResource(400 * GB, 1));
   }
   
   @Test

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesForCSWithPartitions.java

@@ -501,13 +501,13 @@ public class TestRMWebServicesForCSWithPartitions extends JerseyTestBase {
         partitionInfo = partitionsCapsArray.getJSONObject(0);
         partitionName = partitionInfo.getString("partitionName");
         verifyPartitionCapacityInfoJson(partitionInfo, 30, 0, 50, 30, 0, 50);
-        assertEquals("incorrect number of elements", 5,
+        assertEquals("incorrect number of elements", 6,
             partitionsResourcesArray.getJSONObject(0).length());
         break;
       case QUEUE_B:
         assertEquals("Invalid default Label expression", LABEL_LX,
             queueJson.getString("defaultNodeLabelExpression"));
-        assertEquals("incorrect number of elements", 5,
+        assertEquals("incorrect number of elements", 6,
             partitionsResourcesArray.getJSONObject(0).length());
         verifyAccesibleNodeLabels(queueJson, ImmutableSet.of(LABEL_LX));
         assertEquals("incorrect number of partitions", 2,