diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index c27c897bedc..d1e6bc7935a 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -900,6 +900,8 @@ Release 2.8.0 - UNRELEASED
     YARN-4188. Make MoveApplicationAcrossQueues abstract, newInstance static.
     (Giovanni Matteo Fumarola via cdouglas)
 
+    YARN-4171. Fix findbugs warnings in YARN-1197 branch. (Wangda Tan via jianhe)
+
 Release 2.7.2 - 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/rmnode/RMNodeStatusEvent.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNodeStatusEvent.java
index 8323f3ce9ba..0dbea1a1e16 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNodeStatusEvent.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNodeStatusEvent.java
@@ -93,6 +93,7 @@ public class RMNodeStatusEvent extends RMNodeEvent {
     this.logAggregationReportsForApps = logAggregationReportsForApps;
   }
   
+  @SuppressWarnings("unchecked")
   public List<Container> getNMReportedIncreasedContainers() {
     return nmReportedIncreasedContainers == null ? Collections.EMPTY_LIST
         : nmReportedIncreasedContainers;
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/SchedulerApplicationAttempt.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerApplicationAttempt.java
index f064e972f68..005fa71b7c3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerApplicationAttempt.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerApplicationAttempt.java
@@ -478,9 +478,6 @@ public class SchedulerApplicationAttempt implements SchedulableEntity {
     ContainerType containerType = ContainerType.TASK;
     // The working knowledge is that masterContainer for AM is null as it
     // itself is the master container.
-    RMAppAttempt appAttempt = rmContext.getRMApps()
-        .get(container.getId().getApplicationAttemptId().getApplicationId())
-        .getCurrentAppAttempt();
     if (isWaitingForAMContainer(getApplicationId())) {
       containerType = ContainerType.APPLICATION_MASTER;
     }