diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 66c7f17..8b12c9a 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -36,6 +36,9 @@
     YARN-1932. Javascript injection on the job status page (Mit Desai via
     jlowe)
 
+    YARN-853. maximum-am-resource-percent doesn't work after refreshQueues
+    command (Devaraj K via jlowe)
+
 Release 0.23.10 - 2013-12-09
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml b/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
index 53c20f4..4fec302 100644
--- a/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
+++ b/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
@@ -146,6 +146,7 @@
       <Field name="state" />
       <Field name="userLimit" />
       <Field name="userLimitFactor" />
+      <Field name="maxAMResourcePerQueuePercent" />
     </Or>
     <Bug pattern="IS2_INCONSISTENT_SYNC" />
   </Match>
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/capacity/LeafQueue.java b/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
index 8290c7b..0b1106b 100644
--- a/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
+++ b/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
@@ -166,9 +166,8 @@
     maxApplicationsPerUser = 
       (int)(maxApplications * (userLimit / 100.0f) * userLimitFactor);
 
-    this.maxAMResourcePerQueuePercent = 
-        cs.getConfiguration().
-            getMaximumApplicationMasterResourcePerQueuePercent(getQueuePath());
+    float maxAMResourcePerQueuePercent = cs.getConfiguration()
+        .getMaximumApplicationMasterResourcePerQueuePercent(getQueuePath());
     int maxActiveApplications = 
         CSQueueUtils.computeMaxActiveApplications(
             cs.getClusterResources(), this.minimumAllocation,
@@ -195,9 +194,9 @@
         capacity, absoluteCapacity, 
         maximumCapacity, absoluteMaxCapacity, 
         userLimit, userLimitFactor, 
-        maxApplications, maxApplicationsPerUser,
-        maxActiveApplications, maxActiveApplicationsPerUser,
-        state, acls, cs.getConfiguration().getNodeLocalityDelay());
+        maxApplications, maxAMResourcePerQueuePercent, maxApplicationsPerUser,
+        maxActiveApplications, maxActiveApplicationsPerUser, state, acls, cs
+            .getConfiguration().getNodeLocalityDelay());
 
     if(LOG.isDebugEnabled()) {
       LOG.debug("LeafQueue:" + " name=" + queueName
@@ -214,10 +213,10 @@
       float capacity, float absoluteCapacity, 
       float maximumCapacity, float absoluteMaxCapacity,
       int userLimit, float userLimitFactor,
-      int maxApplications, int maxApplicationsPerUser,
-      int maxActiveApplications, int maxActiveApplicationsPerUser,
-      QueueState state, Map<QueueACL, AccessControlList> acls, 
-      int nodeLocalityDelay)
+      int maxApplications, float maxAMResourcePerQueuePercent,
+      int maxApplicationsPerUser, int maxActiveApplications,
+      int maxActiveApplicationsPerUser, QueueState state,
+      Map<QueueACL, AccessControlList> acls, int nodeLocalityDelay)
   {
     // Sanity check
     CSQueueUtils.checkMaxCapacity(getQueueName(), capacity, maximumCapacity);
@@ -234,6 +233,7 @@
     this.userLimitFactor = userLimitFactor;
 
     this.maxApplications = maxApplications;
+    this.maxAMResourcePerQueuePercent = maxAMResourcePerQueuePercent;
     this.maxApplicationsPerUser = maxApplicationsPerUser;
 
     this.maxActiveApplications = maxActiveApplications;
@@ -382,6 +382,14 @@
   public float getMinimumAllocationFactor() {
     return minimumAllocationFactor;
   }
+  
+  /**
+   * Used only by tests.
+   */
+  @Private
+  public float getMaxAMResourcePerQueuePercent() {
+    return maxAMResourcePerQueuePercent;
+  }
 
   public int getMaxApplications() {
     return maxApplications;
@@ -594,6 +602,7 @@
         newlyParsedLeafQueue.absoluteMaxCapacity, 
         newlyParsedLeafQueue.userLimit, newlyParsedLeafQueue.userLimitFactor, 
         newlyParsedLeafQueue.maxApplications,
+        newlyParsedLeafQueue.maxAMResourcePerQueuePercent,
         newlyParsedLeafQueue.getMaxApplicationsPerUser(),
         newlyParsedLeafQueue.getMaximumActiveApplications(), 
         newlyParsedLeafQueue.getMaximumActiveApplicationsPerUser(),
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/capacity/TestLeafQueue.java b/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
index 1a34a7f..8910fcf 100644
--- a/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
+++ b/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
@@ -1614,6 +1614,51 @@
     // after reinitialization
     assertEquals(60, e.getNodeLocalityDelay());
   }
+  
+  @Test
+  public void testMaxAMResourcePerQueuePercentAfterQueueRefresh()
+      throws Exception {
+    CapacitySchedulerConfiguration csConf = new CapacitySchedulerConfiguration();
+    Resource clusterResource = Resources
+        .createResource(100 * 16 * GB);
+    CapacitySchedulerContext csContext = mockCSContext(csConf, clusterResource);
+    csConf.setFloat(CapacitySchedulerConfiguration.
+        MAXIMUM_APPLICATION_MASTERS_RESOURCE_PERCENT, 0.1f);
+    ParentQueue root = new ParentQueue(csContext, 
+        CapacitySchedulerConfiguration.ROOT, CapacityScheduler.queueComparator,
+        null, null);
+    csConf.setCapacity(CapacitySchedulerConfiguration.ROOT + "." + A, 80);
+    LeafQueue a = new LeafQueue(csContext, A, root,
+        CapacityScheduler.applicationComparator, null);
+    assertEquals(0.1f, a.getMaxAMResourcePerQueuePercent(), 1e-3f);
+    assertEquals(160, a.getMaximumActiveApplications());
+    
+    csConf.setFloat(CapacitySchedulerConfiguration.
+        MAXIMUM_APPLICATION_MASTERS_RESOURCE_PERCENT, 0.2f);
+    LeafQueue newA = new LeafQueue(csContext, A, root,
+        CapacityScheduler.applicationComparator, null);
+    a.reinitialize(newA, clusterResource);
+    assertEquals(0.2f, a.getMaxAMResourcePerQueuePercent(), 1e-3f);
+    assertEquals(320, a.getMaximumActiveApplications());
+
+    Resource newClusterResource = Resources.createResource(100 * 20 * GB);
+    a.updateClusterResource(newClusterResource);
+    //  100 * 20 * 0.2 = 400
+    assertEquals(400, a.getMaximumActiveApplications());
+  }
+
+  private CapacitySchedulerContext mockCSContext(
+      CapacitySchedulerConfiguration csConf, Resource clusterResource) {
+    CapacitySchedulerContext csContext = mock(CapacitySchedulerContext.class);
+    when(csContext.getConfiguration()).thenReturn(csConf);
+    when(csContext.getConf()).thenReturn(new YarnConfiguration());
+    when(csContext.getClusterResources()).thenReturn(clusterResource);
+    when(csContext.getMinimumResourceCapability()).thenReturn(
+        Resources.createResource(GB));
+    when(csContext.getMaximumResourceCapability()).thenReturn(
+        Resources.createResource(2 * GB));
+    return csContext;
+  }
 
   
   @After