[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-6813) @Id @OneToOne cause NullPointerException during query

@Id @OneToOne cause NullPointerException during query ----------------------------------------------------- Key: HHH-6813 URL: https://hibernate.onjira.com/browse/HHH-6813 Project: Hibernate ORM Issue Type: Bug Components: core, entity-manager Affects Versions: 3.6.8, 4.0.0.CR5 Environment: Hibernate 4.0.0.CR5, PostgreSQL 9.1.1, Glassfish 3.1.1 Reporter: Alfio Labels: jpa2 Attachments: hiberjta.zip, hiberlocal.zip, hibertest.war, hibertest.zip I've two entities, Person and PersonInfo, with a one-to-one relation: {code:title=Person.java} @Entity public class Person { @Id private Integer id; @Basic private String name; @OneToOne( mappedBy = "id" ) private PersonInfo personInfo; ...getters&setters... } {code} {code:title=PersonInfo.java} @Entity public class PersonInfo { @Id @OneToOne private Person id; @Basic private String info; ...getters&setters... } {code} Hibernate correctly creates two tables but a NPE occours during a simple select query (only if tables have one or more records) em.createQuery("SELECT p FROM Person p").getResultList(); ... java.lang.NullPointerException at org.hibernate.persister.entity.AbstractEntityPersister.loadByUniqueKey(AbstractEntityPersister.java:2202) at org.hibernate.type.EntityType.loadByUniqueKey(EntityType.java:661) at org.hibernate.type.EntityType.resolve(EntityType.java:441) at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:150) at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1006) at org.hibernate.loader.Loader.doQuery(Loader.java:883) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:289) at org.hibernate.loader.Loader.doList(Loader.java:2463) at org.hibernate.loader.Loader.doList(Loader.java:2449) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2279) at org.hibernate.loader.Loader.list(Loader.java:2274) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:196) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1118) at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101) at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:252) at com.sun.enterprise.container.common.impl.QueryWrapper.getResultList(QueryWrapper.java:195) at nogroup.hibertest.Bean.execute(Bean.java:23) at nogroup.hibertest.org$jboss$weld$bean-hibertest-1$0-SNAPSHOT-ManagedBean-class_nogroup$hibertest$Bean_$$_WeldClientProxy.execute(org$jboss$weld$bean-hibertest-1$0-SNAPSHOT-ManagedBean-class_nogroup$hibertest$Bean_$$_WeldClientProxy.java) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:737) at javax.el.BeanELResolver.invoke(BeanELResolver.java:467) at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:254) at com.sun.el.parser.AstValue.invoke(AstValue.java:228) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) ... 33 more