diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
index 7c38a9bf289..827e6a3dfe6 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
@@ -798,7 +798,7 @@ public void handleTransitionToStandByInNewThread() {
   private class StandByTransitionRunnable implements Runnable {
     // The atomic variable to make sure multiple threads with the same runnable
     // run only once.
-    private AtomicBoolean hasAlreadyRun = new AtomicBoolean(false);
+    private final AtomicBoolean hasAlreadyRun = new AtomicBoolean(false);
 
     @Override
     public void run() {