Upgrade to GlassFish Server 3.0.1 from the following earlier releases of the software is supported:
Sun Java System Application Server 9.1 Update 2 (Developer Profile)
Sun GlassFishTM Enterprise Server v2 Update 2 (Developer Profile)
Sun GlassFish Enterprise Server v2.1 (Developer Profile)
Sun GlassFish Enterprise Server v2.1.1 (Developer Profile)
Sun GlassFish Enterprise Server v3 Prelude
GlassFish Server 3.0.1 does not support clustering. Therefore, upgrading from the Enterprise Profile is not supported.
Because the differences between GlassFish Server 3.0.1 and Sun GlassFish Enterprise Server v3 do not affect applications and data, upgrade from Sun GlassFish Enterprise Server v3 is not required.