Is this is bug with JBoss 3.0!!!

[muradhak]

Hi,
I am working with JBoss3.0. I am working on the process migration to JBoss. The previous server bein JOnAs. I am facing two problems.

1. If my bean's remote method is having a return type as Vector, JBoss throws an exception saying 'java.lang.classcastexception:java.util.arraylist'. This code works fine with JOnAs.

2. If my bean's remote method arguement is of parent class and if I pass the corresponding child class

OR

if the bean's remote method is of an interface and if I pass a class which implements this interface

JBoss says 'IllegatArguementException'.

Can anyone throw some light on this it will be helpfull

Cheers
Muarly

[juha]

show your code

[muradhak]

HI Juha,

Following is the code snippets for the above scenarios:

1. Vector Problem
=================

Bean Code:
public Vector ejbFindAllCollectorsByType(int type,String filter, String sort) throws RemoteException, FinderException,ObjectNotFoundException
{
/* code*/
return //Vector;
}

Remote code:
public Vector findAllCollectorsByType(int type,String filter, String sort) throws RemoteException, FinderException,ObjectNotFoundException;

When a call is meade to this method JBoss says:
java.lang.ClassCastException:java.util.ArrayList

But when the return type was changed to ArrayList, the problem got solved. I checked throughly that in the bean implementation not a single ref. is made to ArrayList.

2. IllegalArguementException
============================

Bean Code:
public Command localExecute(Command cmd) throws RemoteException
{
/* code */
}

ClientCode:
AsynCommand cmd = new AsynCommand();
<bean_ref>.localExcute(cmd);

The AsynCommand class directly Implements the Command interface.

But JBoss says:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.ServerException: wrong number of arguments; nested exception is:
java.lang.IllegalArgumentException: wrong number of arguments

Thnkas for your previous help. I cnaged the method signatures to match precisely the home, remote and bean implementation.

Cheers
Muraly

[juha]

You must use java.util.Collection as your return type from multi-object finders.

[muradhak]

Hi,
Fine...
I'll do that....


Any Suggetions about the illegal arguement exception.

Cheers
Muraly

[juha]

show the full stack trace

[dyao73]

Hi,

I'm having the same issue on getting the illegal arguement exception when the remote interface has a parent class as one argument while I'm passing a subclass.

java.lang.IllegalArgumentException: wrong number of arguments
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(S
tatelessSessionContainer.java:660)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invo
ke(CachedConnectionInterceptor.java:186)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(Stat
elessSessionInstanceInterceptor.java:77)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInte
rceptor.java:107)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxIntercep
torCMT.java:178)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:6
0)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.
java:130)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContai
ner.java:313)
at org.jboss.ejb.Container.invoke(Container.java:712)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:
382)
at sun.reflect.GeneratedMethodAccessor58.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
at sun.rmi.transport.Transport$1.run(Transport.java:148)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
60)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:701)
at java.lang.Thread.run(Thread.java:536)


Any suggestions?

Thanks in advance!