I created a server adapter (tech preview) for JBoss EAP 6.1 using the wizard.
When I try to start it from the Servers View, I get an error dialog with the following message:
"The following server requires a JDK to run properly: JBoss EAP 6.1 Runtime Server"

If I edit the Runtime Environment for this server, I get a dialog with the following warning:
"This runtime type requires a JDK for launching a server. We cannot guarantee the default virtual machine for this execution environment is a JDK." while the selected JRE is "Default JRE for JavaSE-1.6". If I switch to "Java SE 6 (MacosX default)" which is the only Java Runtime I configured in JBDS, I get the same error message as above.