If you have a GlassFish Tank ;), then every GlassFish comes with a JMX Conenctor Server end-point on its own port. Once that happens, you can connect and analyze each and every GlassFish via JConsole. The "default" value of port for this is 8686. But when one GlassFish occupies this port and you try to give birth to another GlassFish in the tank (via the create-domain command on asadmin), it will wisely choose another port (called JMX Connector Port) for that purpose. Providing this port on JConsole will let you analyze this GlassFish.
Clear?
-Kedar
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