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java.lang.NullPointerException: 	at it.eng.securitymanager.userca.ejb.UserCABean_1633242272_ConcreteImpl.jdoLookupPersistenceManagerFactory(UserCABean_1633242272_ConcreteImpl.java:1187)	at it.eng.securitymanager.userca.ejb.UserCABean_1633242272_ConcreteImpl.setEntityContext(UserCABean_1633242272_ConcreteImpl.java:1219)	at com.sun.ejb.containers.EntityContainer$EntityContextFactory.create(EntityContainer.java:2599)	at com.sun.ejb.containers.util.pool.NonBlockingPool.getObject(NonBlockingPool.java:176)	at com.sun.ejb.containers.util.pool.NonBlockingPool.getObject(NonBlockingPool.java:133)	at com.sun.ejb.containers.EntityContainer.getPooledEJB(EntityContainer.java:1896)	at com.sun.ejb.containers.EntityContainer.getContext(EntityContainer.java:560)	at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:452)	at it.eng.securitymanager.userca.ejb.UserCABean_1633242272_ConcreteImpl_RemoteHomeImpl.create(UserCABean_1633242272_ConcreteImpl_RemoteHomeImpl.java:28)	at it.eng.securitymanager.userca.ejb._UserCAHome_Stub.create(Unknown Source)	at it.eng.securitymanager.registration.ejb.RegistrationBean.registerCA(RegistrationBean.java:81)	at it.eng.securitymanager.registration.ejb.RegistrationBean_EJBObjectImpl.registerCA(RegistrationBean_EJBObjectImpl.java:52)	at it.eng.securitymanager.registration.ejb._Registration_Stub.registerCA(Unknown Source)	at it.eng.securitymanager.registration.client.UserCARegistrationBean.register(UserCARegistrationBean.java:94)