500 Error code while consuming web service using HTTPURLConnection

Question

Hi,
I am getting an HTTP response code 500 and an IOException when I run a web service client to invoke a BMC Remedy web service (document based). I am using XML over HTTP to hit the web service as follows:
// For Remedy
soapAddress = "http://www.test-sislhelpdesk.siemens.co.in/arsys/services/ARService?server=bomw041a&webService=WebService_Test";
soapEnvelope = "<SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"><SOAP-ENV:Header><AuthenticationInfo><userName>webservice</userName><password>*******</password></AuthenticationInfo></SOAP-ENV:Header><SOAP-ENV:Body><Q1:OpGetList xmlns:Q1=\"urn:WebService_Test\"><Q1:Qualification></Q1:Qualification></Q1:OpGetList></SOAP-ENV:Body></SOAP-ENV:Envelope>";
soapAction = "urn:WebService_Test/OpGetList";
     URL url = new URL(soapAddress);
     HttpURLConnection connection = (HttpURLConnection) url.openConnection();
     System.out.println ("Connection got");
     connection.setDoOutput(true);
     connection.setRequestProperty("Content-Type","text/xml");
     connection.setRequestProperty ("soapAction", "\"" + soapAction + "\"");
     OutputStreamWriter outputStream = new OutputStreamWriter(connection.getOutputStream());
     System.out.println ("outputstream got");
     outputStream.write(soapEnvelope);
     outputStream.flush();
     BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
     String line = null;
     while ((line = reader.readLine()) != null)
          writer.write(line);
          writer.write("\n");
     System.out.println (writer);
     catch(Exception e){
          e.printStackTrace();
I have created a .NET client proxy which seems to work well.
I am not able to figure out as to why this code is not working. May be something wrong with the SOAP message request I am sending? But I have created this SOAP request message from the log generated for a successful hit. Any help in this regard will be highly appreciated.
The web service is on the internet and hance is accessible to all :)
Regards
Vaibhav

Answer 1

Tried "POST" request method, did not work.
Actually when i hit other web services (created by me) , the code works.
But when I hit a third party web service, it fails returning 500 error code.
How can I extract the SOAP message returned, if any and see thinggs for myself.
I guess there is something wrong with the request SOAP message which I am sending.