ClassCastException HibernatePersistence PersistenceProvider

[akearns]

I am porting my existing EJB3 application contained within a .ear and an existing GWT/SmartGWT application contained within a .war to run on Jboss 6 final. Both applications ran on jboss 4.2.3 GA. The SmartGWT application called back into services from JBoss 4.2.3

I am using SmartGWTPower 2.4

Since the SmartGWT application calls into a JBoss services; therefore I included: jboss-service-client.jar and jboss-service-jmx-client.jar as well as utility jar from the original application. When I do this I get the following exception on deployment:

DEPLOYMENTS IN ERROR:
Deployment "persistence.unit:unitName=SST.war#test" is in error due to the
following reason(s): java.lang.ClassCastException:
org.hibernate.ejb.HibernatePersistence cannot be cast to
javax.persistence.spi.PersistenceProvider
at org.jboss.jpa.builder.DefaultCEMFBuilder.build(DefaultCEMFBuilder.jav
a:46) [:1.0.2-alpha-3]
at org.jboss.as.jpa.scanner.HackCEMFBuilder.build(HackCEMFBuilder.java:4
9) [:6.0.0.Final]
at org.jboss.jpa.deployment.PersistenceUnitDeployment.start(PersistenceU
nitDeployment.java:275) [:1.0.2-alpha-3]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_1
7]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39) [:1.6.0_17]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25) [:1.6.0_17]
at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_17]
at org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(Reflec
tionUtils.java:60) [jboss-reflect.jar:2.2.0.GA]
at org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(
ReflectMethodInfoImpl.java:168) [jboss-reflect.jar:2.2.0.GA]
at org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethod
JoinPoint.java:66) [jboss-reflect.jar:2.2.0.GA]
at org.jboss.kernel.plugins.dependency.KernelControllerContextAction$Joi
npointDispatchWrapper.execute(KernelControllerContextAction.java:257) [jboss-ker
nel.jar:2.2.0.GA]
at org.jboss.kernel.plugins.dependency.ExecutionWrapper.execute(Executio
nWrapper.java:47) [jboss-kernel.jar:2.2.0.GA]
at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dis
patchExecutionWrapper(KernelControllerContextAction.java:125) [jboss-kernel.jar:
2.2.0.GA]
at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dis
patchJoinPoint(KernelControllerContextAction.java:72) [jboss-kernel.jar:2.2.0.GA
]
at org.jboss.kernel.plugins.dependency.LifecycleAction.installActionInte
rnal(LifecycleAction.java:202) [jboss-kernel.jar:2.2.0.GA]
at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction
(InstallsAwareAction.java:54) [jboss-kernel.jar:2.2.0.GA]
at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction
(InstallsAwareAction.java:42) [jboss-kernel.jar:2.2.0.GA]
at org.jboss.dependency.plugins.action.SimpleControllerContextAction.sim
pleInstallAction(SimpleControllerContextAction.java:62) [jboss-dependency.jar:2.
2.0.GA]


Can anyone provide any insight into why this might be happening?

[alius]

Hi,

It looks like your problem is related to JBoss class loading.

SmartGWT has it's own hibernate copy and it looks like it clashes with JBoss'es one.

Googling gives a lot of results - I haven't found a clear answer but some threads look promising:
http://community.jboss.org/message/582843?tstart=0
http://community.jboss.org/message/576887#576887?tstart=0

Regards,
Alius