Exception when trying to call "create" in a entity bean

[mecva]

Hi all,

I'm trying to migrate some entity beans from Sun J2EE to JBoss. I think I have succeeded deploying it on JBoss but when I try to call "create" in one specific entity bean it happens the following exception:

10:59:36,929 ERROR [LogInterceptor] RuntimeException:
java.lang.IllegalStateException: INSERTING AN ALREADY EXISTING BEAN, ID = 0
at org.jboss.ejb.plugins.AbstractInstanceCache.insert(AbstractInstanceCache.java:222)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:103)
at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:111)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178)
at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:52)
at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:105)
at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:129)
at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487)
at org.jboss.ejb.Container.invoke(Container.java:730)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:382)
at sun.reflect.GeneratedMethodAccessor60.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.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$1.run(Transport.java:148)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:536)

The exception does not occur in all calls of "create" that I do, but in some. However the calls are the same when the exception occurs and when not.
Anybody knows what could be?

Thanks in advance,

Marcio Azevedo.

[adrian.brock]

Have you already created an entity with the same
primary key? In this case 0
Perhaps your ejbCreate should should be throwing
a DuplicateKeyException?
Maybe your primary key doesn't implement
equals() correctly?

Regards,
Adrian

[mecva]

I haven't created an entity with the same primary key because the PK, in this case, is auto incrementable. But I usually pass 0 as the PK because it shall be ignored. And I do the same in others entity beans which I don't have the exception.
Another information that I have found out is that when the exception occurs, the auto increment counter is incremented to the PK. I mean, if I invoke "create", and the exception doesn't occur, it is stored a row in the table that the PK value is "X". If, after that, I invoke "create" again and the exception occurs, nothing is stored in the table. When I invoke "create" once more and the exception doesn't occur, it is stored a row in the table that the PK value is "X+2". It means that the PK "X+1" was jumped.
I hope it helps the problem's understanding.
Thanks a lot.
Marcio Azevedo.

[adrian.brock]

Which version of JBoss are you using?
Only JBoss3.2 supports auto-increment.
Check in the CMP forum for details.

Regards,
Adrian