My servlet extends the JAXMServlet in the jaxm-api jar. In my onMessage(..) method, I compose up a simple hello world response and send it back. The client receives the exception

com.sun.xml.messaging.saaj.SOAPExceptionImpl: Invalid Content-Type:text/html. Is this an error message instead of a SOAP response?

I cannot determine what I am doing wrong. My service is a simple hello world. Or, is the JAXMServlet is not setting the correct return type?

I tried overriding the doPost method and setting content type explicitly after calling super.doPost. However, I get a response already committed error.

Thanks.