Dynamic Deployment

You can deploy, redeploy, and undeploy a module without restarting the server. This is called dynamic deployment. Although primarily for developers, dynamic deployment can be used in operational environments to bring new applications and modules online without requiring a server restart.

Whenever a redeployment is done, the sessions at that transit time become invalid unless you use the keepSessions=true property of the asadmin redeploy command. For example:

asadmin redeploy --properties keepSessions=true --name hello.war

For details, see the Sun GlassFish Enterprise Server v3 Prelude Reference Manual.

Keep Sessions is also a checkbox option when you redeploy using the Administration Console. For details, click the Help button in the Administration Console.