((javax.xml.ws.BindingProvider) _port).getRequestContext().put(JAXWSProperties.CONTENT_NEGOTIATION_PROPERTY, "pessimistic");

public EpCacheFiClient(long period) {
     try {
          _service = new EpCacheService(new URL(WSDL_URL_KEY), QNAME);
          _port = _service.getEpCachePort();
          ((javax.xml.ws.BindingProvider) _port).getRequestContext().put(JAXWSProperties.CONTENT_NEGOTIATION_PROPERTY, "pessimistic");
          if (_port != null) {
               System.out.println("Found service port!");
          } else {
                 System.exit(128);
          }
     } catch (MalformedURLException e) {
          e.printStackTrace();
     }
}

POST /AlertPort HTTP/1.1
Content-Type: application/fastsoap; action="urn:alert"
Accepts: application/fastsoap, application/text+xml
Content-Length: ....
... sequence of octets …"

POST /epcache/EpCacheService HTTP/1.1
Accept: text/xml, multipart/related
Content-Type: text/xml;charset=utf-8
SOAPAction: "urn:ProcessEpCacheSet"
User-Agent: JAX-WS RI 2.2.4-b01
Host: linux-xxxxx:8080
Connection: keep-alive