diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 631b5326d1f..a94992cca72 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -237,7 +237,10 @@ Release 2.0.5-beta - UNRELEASED
     YARN-412. Fixed FifoScheduler to check hostname of a NodeManager rather
     than its host:port during scheduling which caused incorrect locality for
     containers. (Roger Hoover via acmurthy)
-    
+
+    YARN-500. Fixed YARN webapps to not roll-over ports when explicitly asked
+    to use non-ephemeral ports. (Kenji Kikushima via vinodkv)
+
 Release 2.0.4-alpha - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/WebApps.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/WebApps.java
index 425d45bc082..a2ffbb01af4 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/WebApps.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/WebApps.java
@@ -97,13 +97,14 @@ public class WebApps {
     public Builder<T> at(String bindAddress) {
       String[] parts = StringUtils.split(bindAddress, ':');
       if (parts.length == 2) {
-        return at(parts[0], Integer.parseInt(parts[1]), true);
+        int port = Integer.parseInt(parts[1]);
+        return at(parts[0], port, port == 0);
       }
       return at(bindAddress, 0, true);
     }
 
     public Builder<T> at(int port) {
-      return at("0.0.0.0", port, false);
+      return at("0.0.0.0", port, port == 0);
     }
 
     public Builder<T> at(String address, int port, boolean findPort) {
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/webapp/TestWebApp.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/webapp/TestWebApp.java
index d178dbb16c8..59beab67a4b 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/webapp/TestWebApp.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/webapp/TestWebApp.java
@@ -161,6 +161,30 @@ public class TestWebApp {
     app.stop();
   }
 
+  @Test(expected=org.apache.hadoop.yarn.webapp.WebAppException.class)
+  public void testCreateWithBindAddressNonZeroPort() {
+    WebApp app = WebApps.$for(this).at("0.0.0.0:50000").start();
+    int port = app.getListenerAddress().getPort();
+    assertEquals(50000, port);
+    // start another WebApp with same NonZero port
+    WebApp app2 = WebApps.$for(this).at("0.0.0.0:50000").start();
+    // An exception occurs (findPort disabled)
+    app.stop();
+    app2.stop();
+  }
+
+  @Test(expected=org.apache.hadoop.yarn.webapp.WebAppException.class)
+  public void testCreateWithNonZeroPort() {
+    WebApp app = WebApps.$for(this).at(50000).start();
+    int port = app.getListenerAddress().getPort();
+    assertEquals(50000, port);
+    // start another WebApp with same NonZero port
+    WebApp app2 = WebApps.$for(this).at(50000).start();
+    // An exception occurs (findPort disabled)
+    app.stop();
+    app2.stop();
+  }
+
   @Test public void testServePaths() {
     WebApp app = WebApps.$for("test", this).start();
     assertEquals("/test", app.getRedirectPath());