I have hooked up the legacy MainDeployer to the kernel MainDeployer instance:
<mbean code="org.jboss.deployment.MainDeployer"
name="jboss.system:service=MainDeployer">
<!-- This is used to delegate the deployment handling -->
<attribute name="KernelMainDeployer"><inject bean="MainDeployer" /></attribute>
</mbean>
This will allow deploy/undeploy through the RMIAdaptor to hit the kernel MainDeployer.
