Glassfish: Add Cluster Support

Start your domain
Command: asadmin start-domain domain1

You will see message:
Domain does not support application server clusters and other standalone instances.

Goto: http://localhost:4848/

Go to the Application Server tree node, on the right hand side, you will see the 'Add Cluster Support' button. Click on this button

The next page will show you the implication about this action. Click OK

You will see that the profile has been successfully upgraded and server restart is required

Now restart your server.

You will see message:
Domain supports application server clusters and other standalone instances.