Description of problem:
I have EAP6 DR8 in domain mode. in my host.xml I have

<servers>
<server name="server-one" group="main-server-group">
<!-- server-one inherits the default socket-group declared in the server-group -->
<socket-binding-group ref="standard-sockets" port-offset="50"/>
<jvm name="default">
<!-- Remote JPDA debugging for a specific server <jvm-options> <option value="-Xrunjdwp:transport=dt_socket,address=8787,server=y,suspend=n"/> </jvm-options> -->
</jvm>
</server>
<server name="server-two" group="main-server-group" auto-start="true">
<!-- server-two avoids port conflicts by incrementing the ports in the default socket-group declared in the server-group -->
<socket-binding-group ref="standard-sockets" port-offset="150"/>
<jvm name="default">
<heap size="64m" max-size="256m"/>
</jvm>
</server>
<server name="server-three" group="other-server-group" auto-start="false">
<!-- server-three avoids port conflicts by incrementing the ports in the default socket-group declared in the server-group -->
<socket-binding-group ref="ha-sockets" port-offset="250"/>
</server>

agent detects domain and 3 servers successfully, but they appear offline. All three servers have detected port 9990 in Connection Settings, this seems to be default/fallback.

Version-Release number of selected component (if applicable):
Version: 4.3.0-SNAPSHOT
Build Number: 0753aae

How reproducible: always

I've found repeating this excetption in agent's log:

2011-12-11 11:25:38,954 WARN  [InventoryManager.discovery-1] (rhq.core.pc.inventory.InventoryManager)- Failure during discovery for 
[JBoss AS JVM] Resources - failed after 0 ms.
java.lang.Exception: Discovery component invocation failed.
        at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:29
6)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.ClassCastException: org.rhq.modules.plugins.jbossas7.StandaloneASComponent cannot be cast to org.rhq.plugins.jmx.JMXComponent
        at org.rhq.plugins.jmx.EmbeddedJMXServerDiscoveryComponent.discoverResources(EmbeddedJMXServerDiscoveryComponent.java:56)
        at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:292)
        ... 5 more