diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index cd1a8427f1f..91eb325a0bf 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -82,6 +82,9 @@ Release 2.3.0 - UNRELEASED
     YARN-1222. Make improvements in ZKRMStateStore for fencing (Karthik
     Kambatla via bikas)
 
+    YARN-709. Added tests to verify validity of delegation tokens and logging of
+    appsummary after RM restart. (Jian He via vinodkv)
+
   OPTIMIZATIONS
 
   BUG FIXES
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMAppManager.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMAppManager.java
index 55b748d8952..9df9fa29603 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMAppManager.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMAppManager.java
@@ -54,6 +54,8 @@
 import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
 import org.apache.hadoop.yarn.server.utils.BuilderUtils;
 
+import com.google.common.annotations.VisibleForTesting;
+
 /**
  * This class manages the list of applications for the resource manager. 
  */
@@ -165,6 +167,11 @@ public static void logAppSummary(RMApp app) {
     }
   }
 
+  @VisibleForTesting
+  public void logApplicationSummary(ApplicationId appId) {
+    ApplicationSummary.logAppSummary(rmContext.getRMApps().get(appId));
+  }
+
   protected synchronized void setCompletedAppsMax(int max) {
     this.completedAppsMax = max;
   }
@@ -351,8 +358,7 @@ public void handle(RMAppManagerEvent event) {
       case APP_COMPLETED: 
       {
         finishApplication(applicationId);
-        ApplicationSummary.logAppSummary(
-            rmContext.getRMApps().get(applicationId));
+        logApplicationSummary(applicationId);
         checkAppNumCompletedLimit(); 
       } 
       break;
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockRM.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockRM.java
index cb41ca4e45e..c9a8e6a9ecb 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockRM.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockRM.java
@@ -421,6 +421,10 @@ public ClientToAMTokenSecretManagerInRM getClientToAMTokenSecretManager() {
     return this.clientToAMSecretManager;
   }
 
+  public RMAppManager getRMAppManager() {
+    return this.rmAppManager;
+  }
+
   @Override
   protected void startWepApp() {
     // override to disable webapp
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
index f87f6894bbd..b1d1e19a898 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
@@ -18,6 +18,11 @@
 
 package org.apache.hadoop.yarn.server.resourcemanager;
 
+import static org.mockito.Matchers.isA;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.net.UnknownHostException;
@@ -577,7 +582,14 @@ public void testRMRestartGetApplicationList() throws Exception {
     rm1.waitForState(am2.getApplicationAttemptId(), RMAppAttemptState.KILLED);
 
     // restart rm
-    MockRM rm2 = new MockRM(conf, memStore);
+
+    MockRM rm2 = new MockRM(conf, memStore) {
+      @Override
+      protected RMAppManager createRMAppManager() {
+        return spy(super.createRMAppManager());
+      }
+    };
+
     rm2.start();
 
     GetApplicationsRequest request1 =
@@ -620,6 +632,10 @@ public void testRMRestartGetApplicationList() throws Exception {
         rm2.getClientRMService().getApplications(request2);
     List<ApplicationReport> appList2 = response2.getApplicationList();
     Assert.assertTrue(3 == appList2.size());
+
+    // check application summary is logged for the completed apps after RM restart.
+    verify(rm2.getRMAppManager(), times(3)).logApplicationSummary(
+      isA(ApplicationId.class));
   }
 
   private MockAM launchAM(RMApp app, MockRM rm, MockNM nm)
@@ -920,7 +936,6 @@ public void testAppAttemptTokensRestoredOnRMRestart() throws Exception {
   @Test
   public void testRMDelegationTokenRestoredOnRMRestart() throws Exception {
     conf.setInt(YarnConfiguration.RM_AM_MAX_ATTEMPTS, 2);
-    
     conf.set(
         CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHENTICATION,
         "kerberos");
@@ -1063,6 +1078,43 @@ public void testRMDelegationTokenRestoredOnRMRestart() throws Exception {
     rm2.stop();
   }
 
+  // This is to test submit an application to the new RM with the old delegation
+  // token got from previous RM.
+  @Test
+  public void testAppSubmissionWithOldDelegationTokenAfterRMRestart()
+      throws Exception {
+    conf.setInt(YarnConfiguration.RM_AM_MAX_ATTEMPTS, 2);
+    conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHENTICATION,
+        "kerberos");
+    conf.set(YarnConfiguration.RM_ADDRESS, "localhost:8032");
+    UserGroupInformation.setConfiguration(conf);
+    MemoryRMStateStore memStore = new MemoryRMStateStore();
+    memStore.init(conf);
+
+    MockRM rm1 = new TestSecurityMockRM(conf, memStore);
+    rm1.start();
+
+    GetDelegationTokenRequest request1 =
+        GetDelegationTokenRequest.newInstance("renewer1");
+    UserGroupInformation.getCurrentUser().setAuthenticationMethod(
+        AuthMethod.KERBEROS);
+    GetDelegationTokenResponse response1 =
+        rm1.getClientRMService().getDelegationToken(request1);
+    Token<RMDelegationTokenIdentifier> token1 =
+        ConverterUtils.convertFromYarn(response1.getRMDelegationToken(), rmAddr);
+
+    // start new RM
+    MockRM rm2 = new TestSecurityMockRM(conf, memStore);
+    rm2.start();
+
+    // submit an app with the old delegation token got from previous RM.
+    Credentials ts = new Credentials();
+    ts.addToken(token1.getService(), token1);
+    RMApp app = rm2.submitApp(200, "name", "user",
+        new HashMap<ApplicationAccessType, String>(), false, "default", 1, ts);
+    rm2.waitForState(app.getApplicationId(), RMAppState.ACCEPTED);
+  }
+
   @Test
   public void testRMStateStoreDispatcherDrainedOnRMStop() throws Exception {
     MemoryRMStateStore memStore = new MemoryRMStateStore() {