1. GlassFish Server Upgrade Compatibility Issues
Binary-Compatible Releases For GlassFish Server 3.1
New Default Installation Directory
Changes to Group Management Service Settings
Application Client Interoperability
HADB and hadbm Command Support
Command Line Interface: The asadmin Command
Deprecated asadmin Subcommands
Deprecated, Unsupported, and Obsolete Options
Applications That Use Persistence
HTTP Service to Network Service Changes
Remapping of HTTP Service Attributes and Properties
New Network Service Elements and Attributes
NSS Cryptographic Token Support
2. Upgrading an Installation of Application Server or GlassFish Server
GlassFish Server 3.1 does not support node agents. When updating from installations of earlier product versions in which node agents were configured, the cluster definitions will be migrated, but the clustered instances themselves must be manually re-created. See Upgrading Clusters and Node Agent Configurations for more information.