When shutting down GlassFish (having AHS deployed to it) the following exception is thrown:

[#|2008-04-08T16:31:29.450-0600|SEVERE|sun-appserver9.1|com.icesoft.faces.util.event.servlet.MessagingContextEventPublisher|_ThreadID=45;_ThreadName=RMI TCP Connection(17)-127.0.0.1;_RequestID=1ba934fd-aef1-409a-bf0a-36e20fc04fba;|Failed to stop message delivery!
com.icesoft.net.messaging.MessageServiceException: javax.jms.JMSException: MQJMSRA_DC2001: Unsupported:stop():inACC=false:connectionId=2328107226950913280
        at com.icesoft.net.messaging.jms.JMSAdapter.stop(JMSAdapter.java:274)
        at com.icesoft.net.messaging.MessageServiceClient.stop(MessageServiceClient.java:680)
        at com.icesoft.faces.util.event.servlet.MessagingContextEventPublisher.tearDownMessageServiceClient(MessagingContextEventPublisher.java:189)
        at com.icesoft.faces.util.event.servlet.MessagingContextEventPublisher.publish(MessagingContextEventPublisher.java:91)
        at com.icesoft.faces.util.event.servlet.ContextEventRepeater.contextDestroyed(ContextEventRepeater.java:152)
        at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4567)
        at org.apache.catalina.core.StandardContext.stop(StandardContext.java:5355)
        at com.sun.enterprise.web.WebModule.stop(WebModule.java:357)
        at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1286)
        at com.sun.enterprise.web.VirtualServer.stop(VirtualServer.java:424)
        at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1286)
        at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:538)
        at org.apache.catalina.startup.Embedded.stop(Embedded.java:970)
        at com.sun.enterprise.web.WebContainer.stop(WebContainer.java:931)
        at com.sun.enterprise.web.PEWebContainer.stopInstance(PEWebContainer.java:814)
        at com.sun.enterprise.web.PEWebContainerLifecycle.onShutdown(PEWebContainerLifecycle.java:95)
        at com.sun.enterprise.server.ApplicationServer.onShutdown(ApplicationServer.java:549)
        at com.sun.enterprise.server.ondemand.OnDemandServer.onShutdown(OnDemandServer.java:131)
        at com.sun.enterprise.server.Shutdown.startShutdown(Shutdown.java:75)
        at com.sun.enterprise.admin.event.AdminEventMulticaster.invokeShutdownEventListener(AdminEventMulticaster.java:1501)
        at com.sun.enterprise.admin.event.AdminEventMulticaster.handleShutdownEvent(AdminEventMulticaster.java:1490)
        at com.sun.enterprise.admin.event.AdminEventMulticaster.processEvent(AdminEventMulticaster.java:480)
        at com.sun.enterprise.admin.event.AdminEventMulticaster.multicastEvent(AdminEventMulticaster.java:176)
        at com.sun.enterprise.admin.server.core.channel.AdminChannelServer.sendNotification(AdminChannelServer.java:121)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
        at sun.rmi.transport.Transport$1.run(Transport.java:153)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
        at java.lang.Thread.run(Thread.java:595)
Caused by: javax.jms.JMSException: MQJMSRA_DC2001: Unsupported:stop():inACC=false:connectionId=2328107226950913280
        at com.sun.messaging.jms.ra.DirectConnection._unsupported(DirectConnection.java:864)
        at com.sun.messaging.jms.ra.DirectConnection.stop(DirectConnection.java:441)
        at com.icesoft.net.messaging.jms.JMSSubscriberConnection.stop(JMSSubscriberConnection.java:179)
        at com.icesoft.net.messaging.jms.JMSAdapter.stop(JMSAdapter.java:270)
        ... 34 more

This prevents GlassFish to shutdown completely.