Deployment fails / multiple inheritance

SourceForge Submitter: randahl .
I found out that the JBoss deployment mechanism fails
when you use multiple interface inheritance in your
EJBs, causing errors similar to the one shown at the
end of this post. The error only occurs when you create
a situation similar to what is often refered to as
the "deadly diamond of death" meaning you inherit the
same method twice (which is legal in java when using
multiple interface inheritance).

I have been able to recreate the bug with a setup like
the following:

I have two classes C1 and C2.
C2 extends C1
The class C1 implements an interface called I1.
The class C2 implements an interface called I2.

Because I want to make sure that any class which
implements I2 also implements I1 my I2 interface
extends I1.

As a result C2 implements I1 in the two following ways:

C2 -> I2 -> I1
C2 -> C1 -> I1

• And this makes the deployment fail on JBoss causing
  the ClassFormatError shown below.

This must be a JBoss bug since java permits multiple
interface inheritance and it is stated in the EJB
specification that EJBs are allowed to use inheritance.

If you happen to be the person who knows how to fix
this bug, I would be very grateful if you would e-mail me
at randahl@rockit.dk when you know the ETA of the fix -
I have a truck load of EJBs which use multiple interface
inheritance and so far they simply cannot deploy on
JBoss.

Randahl

Caused by: java.lang.ClassFormatError:
dk/rockit/ArchiveBean
$Proxy (Repetitive method name/signature)
at java.lang.ClassLoader.defineClass0(Native
Method)
at java.lang.ClassLoader.defineClass
(ClassLoader.java:509)
at java.lang.ClassLoader.defineClass
(ClassLoader.java:438)
at
org.jboss.proxy.compiler.Runtime.makeProxyType
(Runtime.java:68)
at org.jboss.proxy.compiler.ProxyCompiler.<init>
(ProxyCompiler.java:76)
at
org.jboss.proxy.compiler.Proxies$Impl.newTarget
(Proxies.java:580)
at org.jboss.proxy.compiler.Proxies.newTarget
(Proxies.java:77)
at
org.jboss.proxy.compiler.Proxy.newProxyInstance
(Proxy.java:49)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCCreateBeanClassIn
stanceCommand.<in
it>(JDBCCreateBeanClassInstanceCommand.java:52)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCCommandFactory.c
reateCreateBeanCla
ssInstanceCommand(JDBCCommandFactory.java:97)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.start
StoreManager(JDB
CStoreManager.java:436)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.start
(JDBCStoreManage
r.java:369)
at
org.jboss.ejb.plugins.CMPPersistenceManager.start
(CMPPersistenceManag
er.java:198)
at org.jboss.ejb.EntityContainer.start
(EntityContainer.java:376)
at org.jboss.ejb.Container.invoke
(Container.java:764)
at org.jboss.ejb.EntityContainer.invoke
(EntityContainer.java:1055)
at org.jboss.mx.server.MBeanServerImpl.invoke
(MBeanServerImpl.java:517)
at
org.jboss.system.ServiceController$ServiceProxy.invoke
(ServiceControl
ler.java:967)
at $Proxy5.start(Unknown Source)
at org.jboss.system.ServiceController.start
(ServiceController.java:396)
at sun.reflect.GeneratedMethodAccessor6.invoke
(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at
org.jboss.mx.capability.ReflectedMBeanDispatcher.invok
e(ReflectedMBea
nDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke
(MBeanServerImpl.java:517)
at org.jboss.util.jmx.MBeanProxy.invoke
(MBeanProxy.java:174)
at $Proxy357.start(Unknown Source)
at org.jboss.ejb.EjbModule.startService
(EjbModule.java:430)
at org.jboss.system.ServiceMBeanSupport.start
(ServiceMBeanSupport.java:1
64)
at sun.reflect.NativeMethodAccessorImpl.invoke0
(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.
java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at
org.jboss.mx.capability.ReflectedMBeanDispatcher.invok
e(ReflectedMBea
nDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke
(MBeanServerImpl.java:517)
at
org.jboss.system.ServiceController$ServiceProxy.invoke
(ServiceControl
ler.java:967)
at $Proxy5.start(Unknown Source)
at org.jboss.system.ServiceController.start
(ServiceController.java:396)
at sun.reflect.GeneratedMethodAccessor6.invoke
(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at
org.jboss.mx.capability.ReflectedMBeanDispatcher.invok
e(ReflectedMBea
nDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke
(MBeanServerImpl.java:517)
at org.jboss.util.jmx.MBeanProxy.invoke
(MBeanProxy.java:174)
at $Proxy12.start(Unknown Source)
at org.jboss.ejb.EJBDeployer.start
(EJBDeployer.java:394)
at org.jboss.deployment.MainDeployer.start
(MainDeployer.java:802)
... 15 more