Remote NotificationFilter with RMIConnector...

[janny77]

Hi all,

I'm a newbie and I'm using JBoss 3.2.1.
I have a problem with RMIConnector and the remote notification mechanism. I successfully instantiate a RemoteMBeanServer and added a listener to a remote MBean without using any filter (null in addNotificationListener statement), all works fine and I rightly catch all notifications. But when I try to use a personalized filter I encounter in this exception:

////////////////////////////////////////////////////////////
RuntimeMBeanException: null
Cause: org.jboss.util.NestedRuntimeException: error marshalling arguments; nested exception is:
java.io.NotSerializableException: org.jboss.jmx.connector.TestClient; - nested throwable: (java.rmi.MarshalException: error marshalling arguments; nested exception is:
java.io.NotSerializableException: org.jboss.jmx.connector.TestClient)
at org.jboss.jmx.connector.rmi.RMIConnectorImpl.addNotificationListener(RMIConnectorImpl.java:431)
at org.jboss.jmx.connector.notification.ClientNotificationListener.addNotificationListener(ClientNotificationListener.java:95)
at org.jboss.jmx.connector.notification.RMIClientNotificationListener.(RMIClientNotificationListener.java:54)
at org.jboss.jmx.connector.rmi.RMIConnectorImpl.addNotificationListener(RMIConnectorImpl.java:445)
at org.jboss.jmx.connector.TestClient.run(TestClient.java:136)
at org.jboss.jmx.connector.TestClient.main(TestClient.java:65)
///////////////////////////////////////////////////////////

I used an inline declaration for the filter:

lConnector.addNotificationListener(
myXMBean,
listener,
new NotificationFilter(){
public boolean isNotificationEnabled(Notification notification) {
return true;
}
},
myXMBean
);

I also try to use an explicit external class implementing the filter logic:

class InternalFilter implements NotificationFilter{
public InternalFilter(){}

public boolean isNotificationEnabled(Notification notification) {
return true;
}
}

...
...

lConnector.addNotificationListener(myXMBean,listener,new InternalFilter(),myXMBean);

with a different result...

////////////////////////////////////////////////////////////
RuntimeMBeanException: null
Cause: org.jboss.util.NestedRuntimeException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: org.jboss.jmx.connector.InternalFilter (no security manager: RMI class loader disabled); - nested throwable: (java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: org.jboss.jmx.connector.InternalFilter (no security manager: RMI class loader disabled))
at org.jboss.jmx.connector.rmi.RMIConnectorImpl.addNotificationListener(RMIConnectorImpl.java:431)
at org.jboss.jmx.connector.notification.ClientNotificationListener.addNotificationListener(ClientNotificationListener.java:95)
at org.jboss.jmx.connector.notification.RMIClientNotificationListener.(RMIClientNotificationListener.java:54)
at org.jboss.jmx.connector.rmi.RMIConnectorImpl.addNotificationListener(RMIConnectorImpl.java:445)
at org.jboss.jmx.connector.TestClient.run(TestClient.java:146)
at org.jboss.jmx.connector.TestClient.main(TestClient.java:65)
////////////////////////////////////////////////////////////

What's wrong???
I known that many improvements will be made in JBoss 4.0 in remoting, but at the moment I need to stay with 3.2!

Thanks

[adrian.brock]

NotificationFilter does not implement Serializable.

You'll have to create a Filter class that implements
both NotificationFilter and Serializable.

Regards,
Adrian

[janny77]

Thanks Adrian,
but NotificationFilter class already extends Serializable. However, I've tried to explicitly implements Serializable in my filter class but the result is the same (adding also a default, no parameter constructor)...

IMHO there is a problem with the security manager, but I'm not skilled in RMI architecture!

Bye,

Gianni

[adrian.brock]

It is actually complaining about the outer class
not being serializable.

Regards,
Adrian

[janny77]

Sorry Adrian, I cannot see your last reply in this thread...

[janny77]

I don't understand what you mean with "outer class not being serializable". I've just tried to serialize my filter class into a file without problems, so seems to be serializable. Is there something wrong with RMI and JBoss 3.2.1 security settings??

[adrian.brock]

RMI is trying to serialize this class

java.io.NotSerializableException: org.jboss.jmx.connector.TestClient

Regards,
Adrian

[janny77]

I moved the filter class in a distinct file:

public class InternalFilter implements NotificationFilter extends Serializable {
public InternalFilter() {
}

public boolean isNotificationEnabled(Notification notification) {

return true;
}

}

..but the problem is still the same!

/////////////////////////
RuntimeMBeanException: null
Cause: org.jboss.util.NestedRuntimeException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: com.esempio.InternalFilter (no security manager: RMI class loader disabled); - nested throwable: (java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: com.esempio.InternalFilter (no security manager: RMI class loader disabled))
at org.jboss.jmx.connector.rmi.RMIConnectorImpl.addNotificationListener(RMIConnectorImpl.java:431)
at org.jboss.jmx.connector.notification.ClientNotificationListener.addNotificationListener(ClientNotificationListener.java:95)
at org.jboss.jmx.connector.notification.RMIClientNotificationListener.(RMIClientNotificationListener.java:54)
at org.jboss.jmx.connector.rmi.RMIConnectorImpl.addNotificationListener(RMIConnectorImpl.java:445)
at com.esempio.TestClient.run(TestClient.java:184)
at com.esempio.TestClient.main(TestClient.java:73)
///////////////////////////

I think that JBoss is not able to load my Remote filter class because it can't use RMI ClassLoader. I suspect that the Security Manager is the responsible!

[adrian.brock]

You need to add your filter class to the server.

Regards,
Adrian