diff -r 7386eca865e1 -r 8f2986ff0235 src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/DataHead.java
--- a/src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/DataHead.java	Thu May 30 10:58:13 2013 -0700
+++ b/src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/DataHead.java	Wed Jun 12 14:47:09 2013 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, 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
@@ -103,8 +103,8 @@
     }
 
     void close() {
+        head = tail = null;
         if (dataFile != null) {
-            head = tail = null;
             dataFile.close();
         }
     }