title: JAX-WS: com.sun.xml.messaging.saaj.SOAPExceptionImpl: No NamespaceURI, SOAP requires faultcode content to be a QName
body: <p>I'm performing a SOAP request via SSL. One request is working, but another request for same SOAP service fails with this exception:</p>
  <pre><code>java.lang.reflect.UndeclaredThrowableException
      com.sun.proxy.$Proxy980.initPayment2(Unknown Source)
      com.mobimoney.emulator.rostelecom.utils.LogicImpl.executeInitPayment2(LogicImpl.java:76)
      com.mobimoney.emulator.rostelecom.servlets.InitPaymentPageServlet.execInitPayment(InitPaymentPageServlet.java:56)
      com.mobimoney.emulator.rostelecom.servlets.InitPaymentPageServlet.service(InitPaymentPageServlet.java:24)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
      org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  com.sun.xml.messaging.saaj.SOAPExceptionImpl: No NamespaceURI, SOAP requires faultcode content to be a QName
      com.sun.xml.messaging.saaj.soap.impl.FaultImpl.setFaultCode(FaultImpl.java:155)
      com.sun.xml.messaging.saaj.soap.impl.FaultImpl.setFaultCode(FaultImpl.java:171)
      org.apache.cxf.jaxws.JaxWsClientProxy.createSoapFault(JaxWsClientProxy.java:208)
      org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:142)
      com.sun.proxy.$Proxy980.initPayment2(Unknown Source)
      com.mobimoney.emulator.rostelecom.utils.LogicImpl.executeInitPayment2(LogicImpl.java:76)
      com.mobimoney.emulator.rostelecom.servlets.InitPaymentPageServlet.execInitPayment(InitPaymentPageServlet.java:56)
      com.mobimoney.emulator.rostelecom.servlets.InitPaymentPageServlet.service(InitPaymentPageServlet.java:24)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
      org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  </code></pre>
  <p>I can't understand what's going wrong. I've Googled this exception and didn't find anything useful.
  Maybe this is a problem in WSDL or how I generated classes from WSDL?</p>