Sun GlassFish Enterprise Server v2.1.1 Upgrade Guide

Migration of Deployed Applications

Application archives (EAR files) and component archives (JAR, WAR, and RAR files) that are deployed in the Application Server 8.x environment do not require any modification to run on Enterprise Server.

Applications and components that are deployed in the source server are deployed on the target server during the upgrade. Applications that do not deploy successfully on the target server must deployed manually on the target server by the user1

If a domain contains information about a deployed application and the installed application components do not agree with the configuration information, the configuration is migrated as is without any attempt to reconfigure the incorrect configurations.