Send the DOMRequest with text/xml mime type content,
public class MTOMRequest
{
private String id;
@XmlMimeType("text/xml")
protected Source content;

public Source getContent()

Server throws TransformerException :

1:32:46,033 ERROR [STDERR] javax.xml.transform.TransformerException:
org.xml.sax.SAXParseException: Content is not allowed in trailing section.
21:32:46,033 ERROR [STDERR] at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:502)