Cannot dispatch url with session id?

[Nevin Ng]

Hi there,

I found that when requesting a RequestDispatcher's path is url encoded with session 
id, the returned object will be null.

e.g.

RequestDispatcher rd = request.getRequestDispatcher(response.encodeURL("/index.jsp"));

this rd will return null if the encodeURL produces 
"/index.jsp;jsessionid=OOLKMGKDDCMA"   

Is this a bug cause I have no problem with other application server?

Regards,
Nevin Ng