@ManyToOne (targetEntity = P.class)
    @JoinColumn(name = "FK_P", insertable = true, updatable = true, nullable = false)
    private Integer pId;

    @OneToMany(mappedBy = "pId")
    @org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.ALL, org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
    private Set<C> cList = new HashSet<C>();

ERROR [STDERR] org.hibernate.PropertyAccessException: could not set a field value by reflection setter of d.i.a.d.C.pId
   at org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:114)
   at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:360)
   at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:221)
   at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3594)
   at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:152)
   at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:877)
   at org.hibernate.loader.Loader.doQuery(Loader.java:752)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
   at org.hibernate.loader.Loader.loadCollection(Loader.java:2015)
   at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:59)
   at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:587)
   at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83)
   at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1743)
   at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366)
   at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108)
   at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186)
   at java.util.Collections$UnmodifiableCollection$1.<init>(Collections.java:1007)
   at java.util.Collections$UnmodifiableCollection.iterator(Collections.java:1006)
   at d.i.a.s.AbstractBean.preloadClass(AbstractBean.java:104)
   at d.i.a.s.AbstractBean.preloadClass(AbstractBean.java:167)
   at d.i.a.s.PMgmtBean.getPList(PMgmtBean.java:201)
   at d.i.a.s.PMgmtBean.saveP(PMgmtBean.java:359)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)
   at org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:69)
   at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor$InvocationContext.proceed(InvocationContextInterceptor.java:138)
   at d.i.a.s.interceptors.AbstractBeanInterceptor.logInvokingTime(AbstractBeanInterceptor.java:57)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.jboss.ejb3.interceptors.aop.EJB3InterceptorInterceptor.invoke(EJB3InterceptorInterceptor.java:83)
   at org.jboss.ejb3.interceptors.aop.EJB3InterceptorInterceptor.invoke(EJB3InterceptorInterceptor.java:70)
   at org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:59)
   at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor$InvocationContext.proceed(InvocationContextInterceptor.java:138)
   at d.i.a.s.interceptors.AbstractBeanInterceptor.logError(AbstractBeanInterceptor.java:38)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.jboss.ejb3.interceptors.aop.EJB3InterceptorInterceptor.invoke(EJB3InterceptorInterceptor.java:83)
   at org.jboss.ejb3.interceptors.aop.EJB3InterceptorInterceptor.invoke(EJB3InterceptorInterceptor.java:70)
   at org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:59)
   at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:73)
   at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:59)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:72)
   at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_13340610.invoke(InvocationContextInterceptor_z_fillMethod_13340610.java)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:88)
   at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_13340610.invoke(InvocationContextInterceptor_z_setup_13340610.java)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:68)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
   at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.security.RunAsSecurityInterceptorv2.invoke(RunAsSecurityInterceptorv2.java:94)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.security.RoleBasedAuthorizationInterceptorv2.invoke(RoleBasedAuthorizationInterceptorv2.java:201)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
   at org.jboss.aop.joinpoint.MethodI
08:42:08,359 ERROR [STDERR] nvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
   at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
   at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:487)
   at org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:53)
   at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
   at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
   at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:908)
   at org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:742)
   at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:695)
   at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:522)
   at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:230)
Caused by: java.lang.IllegalArgumentException: Can not set int field d.i.a.d.C.pId to d.i.a.d.P
   at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146)
   at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:150)
   at sun.reflect.UnsafeIntegerFieldAccessorImpl.set(UnsafeIntegerFieldAccessorImpl.java:80)
   at java.lang.reflect.Field.set(Field.java:657)
   at org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:102)
   ... 98 more