[JBoss-dev] Clustering and AttributeChangeNotification

[Scott M Stark]

The javax.management.AttributeChangeNotification takes a source equal to the 
MBean generating the notification, and we are literally using 'this' of the 
MBean implementation rather than its ObjectName. This seems inconsistent with 
the decoupled nature of JMX and leads immeadiately to problems with notification 
distribution as seen in the HAServiceMBeanSupport's attempt to broadcast state 
changes:

2003-08-03 09:16:23,428 DEBUG [org.javagroups.DefaultPartition] [Sun Aug 3 09:16
:23 PDT 2003] [ERROR] RpcProtocol.callRemoteMethods(): 
exception=java.io.NotSerializableException: 
org.jboss.ha.singleton.HASingletonController

callRemoteMethods():148, org.javagroups.blocks.RpcDispatcher, RpcDispatcher.java
callMethodOnCluster():519, org.jboss.ha.framework.server.HAPartitionImpl, 
HAPartitionImpl.java
callAsyncMethodOnPartition():297, org.jboss.ha.jmx.HAServiceMBeanSupport, 
HAServiceMBeanSupport.java
sendNotificationRemote():315, org.jboss.ha.jmx.HAServiceMBeanSupport, 
HAServiceMBeanSupport.java
sendNotification():272, org.jboss.ha.jmx.HAServiceMBeanSupport, 
HAServiceMBeanSupport.java
start():219, org.jboss.system.ServiceMBeanSupport, ServiceMBeanSupport.java
invoke(), sun.reflect.GeneratedMethodAccessor58
invoke():25, sun.reflect.DelegatingMethodAccessorImpl, 
DelegatingMethodAccessorImpl.java
invoke():324, java.lang.reflect.Method, Method.java
invoke():284, org.jboss.mx.capability.ReflectedMBeanDispatcher, 
ReflectedMBeanDispatcher.java
invoke():550, org.jboss.mx.server.MBeanServerImpl, MBeanServerImpl.java
invoke():976, org.jboss.system.ServiceController$ServiceProxy, 
ServiceController.java
start(), $Proxy39
start():394, org.jboss.system.ServiceController, ServiceController.java

So the question is why are we not using the ObjectName for the source?

--
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Scott Stark
Chief Technology Officer
JBoss Group, LLC
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