diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index f3f8c252af3..78441066f2d 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -313,6 +313,9 @@ Release 0.23.7 - UNRELEASED
     YARN-362. Unexpected extra results when using webUI table search (Ravi
     Prakash via jlowe)
 
+    YARN-400. RM can return null application resource usage report leading to 
+    NPE in client (Jason Lowe via tgraves)
+
 Release 0.23.6 - 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/rmapp/RMAppImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/RMAppImpl.java
index 16dff0602a2..fa8070929cc 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/RMAppImpl.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/RMAppImpl.java
@@ -406,7 +406,8 @@ public class RMAppImpl implements RMApp, Recoverable {
       String host = UNAVAILABLE;
       String origTrackingUrl = UNAVAILABLE;
       int rpcPort = -1;
-      ApplicationResourceUsageReport appUsageReport = null;
+      ApplicationResourceUsageReport appUsageReport =
+          DUMMY_APPLICATION_RESOURCE_USAGE_REPORT;
       FinalApplicationStatus finishState = getFinalApplicationStatus();
       String diags = UNAVAILABLE;
       if (allowAccess) {
@@ -418,18 +419,17 @@ public class RMAppImpl implements RMApp, Recoverable {
           host = this.currentAttempt.getHost();
           rpcPort = this.currentAttempt.getRpcPort();
           appUsageReport = currentAttempt.getApplicationResourceUsageReport();
-        } else {
-          currentApplicationAttemptId = 
-              BuilderUtils.newApplicationAttemptId(this.applicationId, 
-                  DUMMY_APPLICATION_ATTEMPT_NUMBER);
         }
+
         diags = this.diagnostics.toString();
-      } else {
-        appUsageReport = DUMMY_APPLICATION_RESOURCE_USAGE_REPORT;
+      }
+
+      if (currentApplicationAttemptId == null) {
         currentApplicationAttemptId = 
             BuilderUtils.newApplicationAttemptId(this.applicationId, 
                 DUMMY_APPLICATION_ATTEMPT_NUMBER);
       }
+
       return BuilderUtils.newApplicationReport(this.applicationId,
           currentApplicationAttemptId, this.user, this.queue,
           this.name, host, rpcPort, clientToken,
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/TestRMAppTransitions.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/TestRMAppTransitions.java
index cccbc1c91e2..6d407dd4459 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/TestRMAppTransitions.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/TestRMAppTransitions.java
@@ -29,6 +29,7 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.MockApps;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
+import org.apache.hadoop.yarn.api.records.ApplicationReport;
 import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext;
 import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
 import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationSubmissionContextPBImpl;
@@ -616,4 +617,12 @@ public class TestRMAppTransitions {
     assertTimesAtFinish(application);
     assertAppState(RMAppState.KILLED, application);
   }
+
+  @Test
+  public void testGetAppReport() {
+    RMApp app = createNewTestApp(null);
+    assertAppState(RMAppState.NEW, app);
+    ApplicationReport report = app.createAndGetApplicationReport(true);
+    Assert.assertNotNull(report.getApplicationResourceUsageReport());
+  }
 }