HI,

I am trying to access the the RMIAdaptor and keep running into the same problem. I am using the sample code with JBoss 4.0.1 sp1:

 Properties properties = new Properties();
 properties.put(Context.INITIAL_CONTEXT_FACTORY,
 "org.jnp.interfaces.NamingContextFactory");
 properties.put(Context.URL_PKG_PREFIXES, "org.jnp.interfaces");
 properties.put(Context.PROVIDER_URL, "localhost");

 InitialContext ctx = new InitialContext(properties);
 RMIAdaptor server = (RMIAdaptor)ctx.lookup("jmx/rmi/RMIAdaptor");

I keep getting the following error in the ObjectInputStream in the readObject method (I have the jboss-allclient.jar in the classpath which contains the org/jboss/mx/util/Serialization class) :
java.lang.NoClassDefFoundError: org/jboss/mx/util/Serialization
at javax.management.ObjectName.(ObjectName.java:86)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at $Proxy0.(Unknown Source)
at sun.reflect.GeneratedSerializationConstructorAccessor24.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at java.io.ObjectStreamClass.newInstance(ObjectStreamClass.java:788)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1631)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at java.rmi.MarshalledObject.get(MarshalledObject.java:135)
at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:51)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:566)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:520)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:993)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:629)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:520)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at JbossJmsAdmin.main(JbossJmsAdmin.java:64)

Any ideas? Is this just a newbie common error. I am having the same problem hitting both a RedHat JBoss server and the local Windows XP server.

Thanks for any help.

MArc