--- old/src/java.xml.ws/share/classes/com/sun/xml/internal/messaging/saaj/packaging/mime/MessagingException.java	2015-10-16 12:58:08.000000000 +0200
+++ new/src/java.xml.ws/share/classes/com/sun/xml/internal/messaging/saaj/packaging/mime/MessagingException.java	2015-10-16 12:58:08.000000000 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, 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
@@ -121,7 +121,7 @@
             return super.getMessage();
         Exception n = next;
         String s = super.getMessage();
-        StringBuffer sb = new StringBuffer(s == null ? "" : s);
+        StringBuilder sb = new StringBuilder(s == null ? "" : s);
         while (n != null) {
             sb.append(";\n  nested exception is:\n\t");
             if (n instanceof MessagingException) {