Merge branch '5.3.x'

spring-websocket/src/main/java/org/springframework/web/socket/messaging/StompSubProtocolHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -374,6 +374,8 @@ public class StompSubProtocolHandler implements SubProtocolHandler, ApplicationE
 		headerAccessor.setMessage(error.getMessage());
 
 		byte[] bytes = this.stompEncoder.encode(headerAccessor.getMessageHeaders(), EMPTY_PAYLOAD);
+		// We cannot use try-with-resources here for the WebSocketSession, since we have
+		// custom handling of the close() method in a finally-block.
 		try {
 			session.sendMessage(new TextMessage(bytes));
 		}