request.getRequestURL() contains "JspRedirector"

Hi all,
 
In a JspTestCase, I am setting the simulated URL in the following way:
 
public void begin(WebRequest theRequest)
  {
    theRequest.setURL("localhost:8080", "/petstore", null, null,
"aParam=aVal");
  }
 
In the test case itself however,
 
request.getRequestURL()
 
will return: 
 
http://localhost:8080/petstore/JspRedirector

I do not understand why the result contains "JspRedirector".

I am using Sun App Server 8.2. and Cactus 1.7.2.

Any help would be appreciated.

Best regards,
Vahan Harput