[jboss-user] [Beginners Corner] - java.lang.ClassCastException: org.jboss.util.id.GUID cannot
Hi,
I am attempting to lookup and call methods on an ejb from a servlet where the two are
deployed in separate ear files on the same JBoss server.
I believe I have encountered a classloading issue, if so, I am not sure how to resolve
it. Can anyone help me resolve this problem?
Anyway, here is my latest progress, the exception is encountered at
obj = PortableRemoteObject.narrow(ctx.lookup("ejb/UserAdmin/UserBean" ,
Class.forName(className));
Is this a classloading issue or a configuration issue?
Has anyone encountered this problem? And if so do you know what I may be doing wrong.
Thanks in advance, hopefully someone has a clue as to what this problem may be.
Bob
Lookup code
InitialContext ctx = new InitialContext();
Object obj = null;
try {
obj = PortableRemoteObject.narrow(ctx.lookup("ejb/UserAdmin/UserBean"),
Class.forName(className));
} catch (Exception e) {
logger.log(Level.ERROR, e.getMessage(), e);
}
UserBeanHome home = (UserBeanHome)obj;
UserBean remote = (UserBean) home.create();
Exception
java.lang.ClassCastException: org.jboss.util.id.GUID cannot be cast to org.jboss
.util.id.GUID
at org.jboss.invocation.InvokerInterceptor.readExternal(InvokerInterceptor.java:358)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
at org.jboss.proxy.ejb.RetryInterceptor.readExternal(RetryInterceptor.java:291)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.jboss.proxy.ClientContainer.readExternal(ClientContainer.java:156)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869)at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at java.rmi.MarshalledObject.get(MarshalledObject.java:142)
at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:72)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:652)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:587)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
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