From: Tom Mueller <tom.mueller_at_oracle.com>
Date: Thu, 23 Jun 2011 16:39:35 -0500

There may be better ways to do this, but here's one way.

1. Create another domain, say domain2.
2. Copy the admin-keyfile from that new domain back to the original domain:

cp glassfish/domains/domain2/config/admin-keyfile
glassfish/domains/domain1/config

(This assumes domain1 is the original domain).
Now your domain1 will have whatever password that was set for domain2.

Tom