diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMCriticalThreadUncaughtExceptionHandler.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMCriticalThreadUncaughtExceptionHandler.java
index c5c60876a30..a67f81a8f7f 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMCriticalThreadUncaughtExceptionHandler.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMCriticalThreadUncaughtExceptionHandler.java
@@ -37,7 +37,7 @@ public class RMCriticalThreadUncaughtExceptionHandler
     implements UncaughtExceptionHandler {
   private static final Log LOG = LogFactory.getLog(
       RMCriticalThreadUncaughtExceptionHandler.class);
-  private RMContext rmContext;
+  private final RMContext rmContext;
 
   public RMCriticalThreadUncaughtExceptionHandler(RMContext rmContext) {
     this.rmContext = rmContext;