What does the crossContext attribute do in Tomcat? Does it enable session sharing?

Question

All I can find in the Tomcat 5.5 docs is:

Set to true if you want calls within this application to ServletContext.getContext() to successfully return

Answer 1

I tried it myself and I can't find the magical session sharing side effect, so the crossContext attribute only does what the docs say.

I've posted another question to see if there is a way to share the session state.