I'm using Tomcat 4.0.3 and trying out the
SessionInvocationProcessor through the servlet interface.
When I make a request, the callerIp in getSession() is
null, and getSession() dies with NPE.
It looks like the preProcess method in the SIP does not
get called (for whatever reason) when using a servlet
interface. I'm not sure why this is, but I'll see if I
can implement a fix.