--- old/src/java.xml/share/classes/javax/xml/xpath/XPathException.java	2020-08-18 00:44:45.965930593 +0000
+++ new/src/java.xml/share/classes/javax/xml/xpath/XPathException.java	2020-08-18 00:44:45.669923095 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -40,7 +40,9 @@
  * @since 1.5
  */
 public class XPathException extends Exception {
-
+    /**
+     * serializable fields
+     */
     private static final ObjectStreamField[] serialPersistentFields = {
         new ObjectStreamField( "cause", Throwable.class )
     };