diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index 6e13ab06041..b1953020650 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -45,6 +45,9 @@ Release 2.0.0 - UNRELEASED
 
     MAPREDUCE-4103. Fix HA docs for changes to shell command fencer args (todd)
 
+    MAPREDUCE-4093. Improve RM WebApp start up when proxy address is not set
+    (Devaraj K vai bobby)
+
   OPTIMIZATIONS
 
   BUG FIXES
diff --git a/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java b/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
index 22056065d0a..2336ba8285e 100644
--- a/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
+++ b/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
@@ -443,14 +443,14 @@ protected void startWepApp() {
       WebApps.$for("cluster", ApplicationMasterService.class, masterService, "ws").at(
           this.conf.get(YarnConfiguration.RM_WEBAPP_ADDRESS,
           YarnConfiguration.DEFAULT_RM_WEBAPP_ADDRESS)); 
+    String proxyHostAndPort = YarnConfiguration.getProxyHostAndPort(conf);
     if(YarnConfiguration.getRMWebAppHostAndPort(conf).
-        equals(YarnConfiguration.getProxyHostAndPort(conf))) {
+        equals(proxyHostAndPort)) {
       AppReportFetcher fetcher = new AppReportFetcher(conf, getClientRMService());
       builder.withServlet(ProxyUriUtils.PROXY_SERVLET_NAME, 
           ProxyUriUtils.PROXY_PATH_SPEC, WebAppProxyServlet.class);
       builder.withAttribute(WebAppProxy.FETCHER_ATTRIBUTE, fetcher);
-      String proxy = YarnConfiguration.getProxyHostAndPort(conf);
-      String[] proxyParts = proxy.split(":");
+      String[] proxyParts = proxyHostAndPort.split(":");
       builder.withAttribute(WebAppProxy.PROXY_HOST_ATTRIBUTE, proxyParts[0]);
 
     }