Heavy loads on SOAP RPC

[Tiago Fernandes Thomaz]

Hi,

I'm facing some trouble concerning heavy loads on soap rpc.
I coded a soap client that simulates several clients with a Thread
implementation.
My snippet code is:

public class SOAPClient
{
  public static void main (String[] args) throws Exception
  {
    URL url = new URL(args[0]);
    String sXML = null;

    for (int i = 0; i < 50; i++)
    {
        sXML = "<?xml version=\"1.0\" encoding=\"US-ASCII\"?><request client
= \"client"+i+"\" action = \"action"+i+"\"><parameter name =
\"name"+i+"\">My Name"+i+"</parameter></request> ";

      Call call = new Call();
      call.setTargetObjectURI("urn:Connector");
      call.setMethodName("sendRequest");
      call.setEncodingStyleURI("http://schemas.xmlsoap.org/soap/encoding/";);
      Vector params = new Vector();
      params.addElement(new org.apache.soap.rpc.Parameter("sXML",
String.class, sXML, null));

      call.setParams(params);

      (new TestThread(call, url)).start();
    }
  }
}


public class TestThread extends Thread
{
  Call testCall = null;
  URL  url = null;
 
  public TestThread(Call testCall, URL url)
  {
    this.testCall = testCall;
    this.url = url;
  }

  public void run()
  {
    try {
      org.apache.soap.rpc.Response resp = testCall.invoke(url, "");

      if (resp.generatedFault())
      {
        Fault fault = resp.getFault();
        System.out.println(this.getName() + "Fault Code   = " +
fault.getFaultCode());
        System.out.println(this.getName() + "Fault String = " +
fault.getFaultString());
      }
      else
      {
        org.apache.soap.rpc.Parameter result = resp.getReturnValue();
        String res = result.toString();
        Object obj = result.getValue();
        String resp2 = obj.toString();
        System.out.println(this.getName()+" - Result: "+resp2);
      }
    }
    catch (Exception e)
    {
      System.out.println(this.getName() + " :Error! - " + e.getMessage());
    }
  }
}

, and I'm getting the following exception for most of the Threads (30 out of
50):

Thread-i Error opening socket: Connection refused: connect

Does anyone explain me why am I getting this? Is it because SOAP can only
handle about 20 http connections?

Tiago Fernandes Thomaz