I'm migrating an existing java 8 application to java 21. This app calls a web service via a client. After migrating the main app and the client to java 21, I got the following error when the app is calling the web service. There are only a few lines of errors and what you see is all there is.

The line that caused the exception to occur is the last line in the code shown.

I'm new to web services, especially SOAP web services.

Does anyone have any suggestion as to what the issue is?

thank you,

.springframework.ws.soap.client.SoapFaultClientException: Missing header 'entityType' for method parameter type [class java.lang.String]
    at .springframework.ws.soap.client.core.SoapFaultMessageResolver.resolveFault(SoapFaultMessageResolver.java:39)
    at .springframework.ws.client.core.WebServiceTemplate.handleFault(WebServiceTemplate.java:843)
    at .springframework.ws.client.core.WebServiceTemplate.doSendAndReceive(WebServiceTemplate.java:646)
    at .springframework.ws.client.core.WebServiceTemplate.sendAndReceive(WebServiceTemplate.java:575)
    at .springframework.ws.client.core.WebServiceTemplate.marshalSendAndReceive(WebServiceTemplate.java:422)
    at com.me.client.ABCClient.callLookoutService(ABCClient.java:425)
    at com.me.client.ABCClient.processLookout(ABCClient.java:262)
    at com.me.client.ABCClient.execute(ABCClient.java:688)
    at .quartz.core.JobRunShell.run(JobRunShell.java:202)
    at .quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)

    Response callWebService(Request request)
    {
        Response response = new Response();
        try
            {
                
                    JAXBContext jc = JAXBContext.newInstance(Request.class);
                    Marshaller marshallerPrint = jc.createMarshaller();
                    marshallerPrint.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,Boolean.TRUE);
                    Writer sw = new StringWriter();

                    marshallerPrint.marshal(request, sw);
                                
                    //Verify XML Content
                    String xmlContent = sw.toString();
                    
                    Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
                    marshaller.setContextPath("xxx.yyy.zzz.wsdl.query.v1");
                    
                    
                    WebServiceTemplate webTemplate= new WebServiceTemplate();
                    webTemplate.setMarshaller(marshaller);
                    webTemplate.setUnmarshaller(marshaller);

                     response = (Response) webTemplate.marshalSendAndReceive("service_url_here", request, new SoapActionCallback(";));
                            
            }
            .
            .
            .
    }