Sun Java System Application Server Platform Edition 9 Developer's Guide

Class Loader Universes

Access to components within applications and modules installed on the server occurs within the context of isolated class loader universes, each of which has its own Application, EJB, Web, and JSP Engine class loaders.

A resource such as a file that is accessed by a servlet, JSP, or EJB component must be in one of the following locations:

Note –

In iPlanetTM Application Server 6.x, individually deployed modules shared the same class loader. In subsequent Application Server versions, each individually deployed module has its own class loader universe.