EAServer uses custom class loaders to allow you to refresh implementation classes without restarting the server. Loading multiple copies of the same class uses memory unnecessarily. To avoid this issue, configure a common class loader for use by the Web application and the components that it calls. To do this, configure an application-level or server-level class list, as described in Chapter 10, “Configuring Java Class Loaders,” in the EAServer System Administration Guide.