diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter.java
index 7b0f5038ee..66049d310e 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -821,18 +821,9 @@ public class RequestMappingHandlerAdapter extends AbstractHandlerMethodAdapter
 	 * (never {@code null}).
 	 */
 	private SessionAttributesHandler getSessionAttributesHandler(HandlerMethod handlerMethod) {
-		Class<?> handlerType = handlerMethod.getBeanType();
-		SessionAttributesHandler sessionAttrHandler = this.sessionAttributesHandlerCache.get(handlerType);
-		if (sessionAttrHandler == null) {
-			synchronized (this.sessionAttributesHandlerCache) {
-				sessionAttrHandler = this.sessionAttributesHandlerCache.get(handlerType);
-				if (sessionAttrHandler == null) {
-					sessionAttrHandler = new SessionAttributesHandler(handlerType, this.sessionAttributeStore);
-					this.sessionAttributesHandlerCache.put(handlerType, sessionAttrHandler);
-				}
-			}
-		}
-		return sessionAttrHandler;
+		return this.sessionAttributesHandlerCache.computeIfAbsent(
+				handlerMethod.getBeanType(),
+				type -> new SessionAttributesHandler(type, this.sessionAttributeStore));
 	}
 
 	/**