[Tomcat 5-Servlet] Dispatcher che non funziona

[Lancill]

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: Servlet execution threw an exception
	jshop.DispatcherServlet.gotoPage(DispatcherServlet.java:57)
	jshop.DispatcherServlet.doGet(DispatcherServlet.java:31)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

...si ripete la stessa sequenza per un bel po' e nella root cause:

java.lang.StackOverflowError
org.apache.coyote.tomcat5.CoyoteRequest.getMethod(CoyoteRequest.java:1918)
org.apache.coyote.tomcat5.CoyoteRequestFacade.getMethod(CoyoteRequestFacade.java:484)
javax.servlet.http.HttpServletRequestWrapper.getMethod(HttpServletRequestWrapper.java:158)
javax.servlet.http.HttpServletRequestWrapper.getMethod(HttpServletRequestWrapper.java:158)

   .
   .
   .

javax.servlet.http.HttpServletRequestWrapper.getMethod(HttpServletRequestWrapper.java:158)javax.servlet.http.HttpServlet.service(HttpServlet.java:736)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
jshop.DispatcherServlet.gotoPage(DispatcherServlet.java:57)
jshop.DispatcherServlet.doGet(DispatcherServlet.java:31)