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

[Alfio (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-6813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44306#comment-44306 ] 

Alfio commented on HHH-6813:
----------------------------

Attempting to provide better test cases I found out new info about this bug.

1 - using JTA (hiberjta.zip) a NPE is thrown when em.createQuery().getResultList() method is invoked (select test);

2 - using JTA a StackOverflowException is thrown when em.find() method is invoked (find test);

3 - using RESOURCE_LOCAL (hiberlocal.zip) no errors are thrown if only select test or find test is executed;

4 - using RESOURCE_LOCAL an exception in thrown if both select test and find test are executed together. The type of error (NPE or SOE) depends on which method is executed before (Junit does not guarantee the execution order);

> @Id @OneToOne cause NullPointerException during query
> -----------------------------------------------------
>
>                 Key: HHH-6813
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6813
>             Project: Hibernate Core
>          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

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