13:10:45,670 ERROR [LogInterceptor] Unexpected Error in method: public abstract
java.util.Collection br.com.romasystems.socia.negocio.ejb.AdminFacade.findClient
esComContratoSemSistema() throws java.rmi.RemoteException
java.lang.NoClassDefFoundError: java/lang/ref/Reference
        at org.apache.commons.collections.ReferenceMap$Entry.purge(Unknown Sourc
e)
        at org.apache.commons.collections.ReferenceMap.purge(Unknown Source)
        at org.apache.commons.collections.ReferenceMap.purge(Unknown Source)
        at org.apache.commons.collections.ReferenceMap.get(Unknown Source)
        at org.hibernate.impl.SessionFactoryImpl.get(SessionFactoryImpl.java:334
)
        at org.hibernate.impl.SessionFactoryImpl.getQuery(SessionFactoryImpl.jav
a:408)
        at org.hibernate.impl.SessionImpl.getQueries(SessionImpl.java:870)
        at org.hibernate.impl.SessionImpl.list(SessionImpl.java:820)
        at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
        at br.com.romasystems.util.persistencia.HibernateOperations.createQuery(
HibernateOperations.java:199)
        at br.com.romasystems.socia.negocio.service.ClienteConcreteOperations.fi
ndAllClientesComContratoSemSistema(ClienteConcreteOperations.java:150)
        at br.com.romasystems.socia.negocio.ejb.AdminFacadeBean.findClientesComC
ontratoSemSistema(AdminFacadeBean.java:682)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.jboss.invocation.Invocation.performCall(Invocation.java:345)
        at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(S
tatelessSessionContainer.java:214)
        at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invo
ke(CachedConnectionInterceptor.java:185)
        at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(Stat
elessSessionInstanceInterceptor.java:130)
        at org.jboss.webservice.server.ServiceEndpointInterceptor.invoke(Service
EndpointInterceptor.java:51)
        at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidation
Interceptor.java:48)
        at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInte
rceptor.java:105)
        at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxIntercep
torCMT.java:335)
        at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:1
66)
        at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.
java:139)
        at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192)
        at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFacto
ryFinderInterceptor.java:122)
        at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:6
24)
        at org.jboss.ejb.Container.invoke(Container.java:873)
        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:585)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatch
er.java:141)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.
java:249)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
        at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke
(JRMPInvoker.java:805)
        at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:
406)
        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:585)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
        at sun.rmi.transport.Transport$1.run(Transport.java:153)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
60)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:701)
        at java.lang.Thread.run(Thread.java:595)