--- old/src/java.xml.ws/share/classes/com/sun/xml/internal/messaging/saaj/soap/SOAPPartImpl.java	2017-10-24 14:21:36.416129941 +0100
+++ new/src/java.xml.ws/share/classes/com/sun/xml/internal/messaging/saaj/soap/SOAPPartImpl.java	2017-10-24 14:21:36.124129942 +0100
@@ -618,7 +618,7 @@
 
     @Override
     public Document getOwnerDocument() {
-        return document.getDomDocument().getOwnerDocument();
+        return document;
     }
 
     @Override