diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 9b985a2216c..65fbb3f5f43 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -1138,6 +1138,9 @@ Release 2.8.0 - UNRELEASED
     YARN-4581. AHS writer thread leak makes RM crash while RM is recovering. 
     (sandflee via junping_du)
 
+    YARN-4538. QueueMetrics pending cores and memory metrics wrong.
+    (Bibin A Chundatt via wangda)
+
 Release 2.7.3 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/AppSchedulingInfo.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/AppSchedulingInfo.java
index c5f8cd1247b..a26a2a19686 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/AppSchedulingInfo.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/AppSchedulingInfo.java
@@ -526,8 +526,8 @@ public class AppSchedulingInfo {
     }
     
     // Set queue metrics
-    queue.getMetrics().allocateResources(user, 0,
-        increaseRequest.getDeltaCapacity(), true);
+    queue.getMetrics().allocateResources(user,
+        increaseRequest.getDeltaCapacity());
     
     // remove the increase request from pending increase request map
     removeIncreaseRequest(nodeId, priority, containerId);
@@ -550,7 +550,7 @@ public class AppSchedulingInfo {
     }
     
     // Set queue metrics
-    queue.getMetrics().releaseResources(user, 0, absDelta);
+    queue.getMetrics().releaseResources(user, absDelta);
 
     // update usage
     appResourceUsage.decUsed(decreaseRequest.getNodePartition(), absDelta);
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/QueueMetrics.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/QueueMetrics.java
index 68ae3648109..d9c7283675e 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/QueueMetrics.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/QueueMetrics.java
@@ -44,7 +44,6 @@ import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppState;
 import org.apache.hadoop.yarn.server.utils.BuilderUtils;
-import org.apache.hadoop.yarn.util.resource.Resources;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -379,10 +378,9 @@ public class QueueMetrics implements MetricsSource {
   }
 
   private void _decrPendingResources(int containers, Resource res) {
-    // if #container = 0, means change container resource
     pendingContainers.decr(containers);
-    pendingMB.decr(res.getMemory() * Math.max(containers, 1));
-    pendingVCores.decr(res.getVirtualCores() * Math.max(containers, 1));
+    pendingMB.decr(res.getMemory() * containers);
+    pendingVCores.decr(res.getVirtualCores() * containers);
   }
 
   public void incrNodeTypeAggregations(String user, NodeType type) {
@@ -406,12 +404,11 @@ public class QueueMetrics implements MetricsSource {
 
   public void allocateResources(String user, int containers, Resource res,
       boolean decrPending) {
-    // if #containers = 0, means change container resource
     allocatedContainers.incr(containers);
     aggregateContainersAllocated.incr(containers);
 
-    allocatedMB.incr(res.getMemory() * Math.max(containers, 1));
-    allocatedVCores.incr(res.getVirtualCores() * Math.max(containers, 1));
+    allocatedMB.incr(res.getMemory() * containers);
+    allocatedVCores.incr(res.getVirtualCores() * containers);
     if (decrPending) {
       _decrPendingResources(containers, res);
     }
@@ -424,12 +421,33 @@ public class QueueMetrics implements MetricsSource {
     }
   }
 
+  /**
+   * Allocate Resource for container size change.
+   *
+   * @param user
+   * @param res
+   */
+  public void allocateResources(String user, Resource res) {
+    allocatedMB.incr(res.getMemory());
+    allocatedVCores.incr(res.getVirtualCores());
+
+    pendingMB.decr(res.getMemory());
+    pendingVCores.decr(res.getVirtualCores());
+
+    QueueMetrics userMetrics = getUserMetrics(user);
+    if (userMetrics != null) {
+      userMetrics.allocateResources(user, res);
+    }
+    if (parent != null) {
+      parent.allocateResources(user, res);
+    }
+  }
+
   public void releaseResources(String user, int containers, Resource res) {
-    // if #container = 0, means change container resource.
     allocatedContainers.decr(containers);
     aggregateContainersReleased.incr(containers);
-    allocatedMB.decr(res.getMemory() * Math.max(containers, 1));
-    allocatedVCores.decr(res.getVirtualCores() * Math.max(containers, 1));
+    allocatedMB.decr(res.getMemory() * containers);
+    allocatedVCores.decr(res.getVirtualCores() * containers);
     QueueMetrics userMetrics = getUserMetrics(user);
     if (userMetrics != null) {
       userMetrics.releaseResources(user, containers, res);
@@ -439,6 +457,24 @@ public class QueueMetrics implements MetricsSource {
     }
   }
 
+  /**
+   * Release Resource for container size change.
+   *
+   * @param user
+   * @param res
+   */
+  public void releaseResources(String user, Resource res) {
+    allocatedMB.decr(res.getMemory());
+    allocatedVCores.decr(res.getVirtualCores());
+    QueueMetrics userMetrics = getUserMetrics(user);
+    if (userMetrics != null) {
+      userMetrics.releaseResources(user, res);
+    }
+    if (parent != null) {
+      parent.releaseResources(user, res);
+    }
+  }
+
   public void reserveResource(String user, Resource res) {
     reservedContainers.incr();
     reservedMB.incr(res.getMemory());
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestQueueMetrics.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestQueueMetrics.java
index 864620f1f54..c772ae142c7 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestQueueMetrics.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestQueueMetrics.java
@@ -87,6 +87,14 @@ public class TestQueueMetrics {
     metrics.releaseResources(user, 1, Resources.createResource(2*GB, 2));
     checkResources(queueSource, 4*GB, 4, 2, 3, 1, 100*GB, 100, 9*GB, 9, 2, 0, 0, 0);
 
+    metrics.incrPendingResources(user, 0, Resources.createResource(2 * GB, 2));
+    checkResources(queueSource, 4 * GB, 4, 2, 3, 1, 100 * GB, 100, 9 * GB, 9, 2,
+        0, 0, 0);
+
+    metrics.decrPendingResources(user, 0, Resources.createResource(2 * GB, 2));
+    checkResources(queueSource, 4 * GB, 4, 2, 3, 1, 100 * GB, 100, 9 * GB, 9, 2,
+        0, 0, 0);
+
     metrics.finishAppAttempt(
         app.getApplicationId(), app.isPending(), app.getUser());
     checkApps(queueSource, 1, 0, 0, 0, 0, 0, true);