From: <glassfish_at_javadesktop.org>
Date: Wed, 02 Jan 2008 12:58:23 PST

This is because the server has not started :).

If you look into the server.log and find that server startup has aborted, you are running into:
https://glassfish.dev.java.net/issues/show_bug.cgi?id=3879.

Till the fix for the same is integrated and above fails with JMXConnector Server startup problems,
 here is your *work-around*:
- Edit domain.xml
- Search for system-jmx-connector and set its enabled attribute to false.

- Kedar
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