Cause: As documented and scripted, httpd ServerName was left as "localhost" and the SSL certificate created on node/broker hosts was invalid. Separately, Java 7 HTTPS clients refuse connections when certain related warnings are given by a server.
Access by Java 7-based clients (e.g. JBoss Developer Tools) to the broker would fail, as well as Java 7 client access to apps.
Documentation and example install scripts were modified to indicate setting the ServerName and creating correct certificates.
This problem should not occur if the documentation or scripts are followed.