[hibernate-issues] [Hibernate-JIRA] Commented: (EJB-401) @OneToOne or @ManyToOne references an unknown entity when maven-surefire-test runs without -DforkMode=none property

@OneToOne or @ManyToOne references an unknown entity when maven-surefire-test runs without -DforkMode=none property ------------------------------------------------------------------------------------------------------------------- Key: EJB-401 URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-401 Project: Hibernate Entity Manager Issue Type: Bug Components: EntityManager Affects Versions: 3.3.2.GA Reporter: Farrukh Najmi Priority: Critical I have an entity class called Referer that references another entity class called Referenced as follows: //The class that has a reference @Entity(name = "acme.Referer") @Table(name = "REFERER") @Inheritance(strategy = InheritanceType.JOINED) public class DeliveryInfoType extends RefererBase { @ManyToOne(targetEntity = acme.Referenced.class, cascade = { CascadeType.ALL }) @JoinColumn(name = "REFERER_REFERENCED_ID") protected acme.Referenced referenced; ... } //The class that is being referenced @Entity(name = "acme.Referenced") @Table(name = "REFERENCED") @Inheritance(strategy = InheritanceType.JOINED) public class EndpointReferenceType ... } The abstract base class for Referer is a mapped superclass called RefererBase as follows: @MappedSuperclass public abstract class ExtensibleObjectType { ... } When I run a junit test via maven-surefire-plugin while specifying the -DforkMode=none property then the test succeeds. When I run a junit test via maven-surefire-plugin without specifying the -DforkMode=none property then the test fails when creating the EntityManagerFactory as follows. Caused by: javax.persistence.PersistenceException: [PersistenceUnit: my-persistence-unit] Unable to configure EntityManagerFactory at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:265) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:125) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at acme.SomeClass.createEntityManagerFactory(SomeClass.java:278) at acme.SomeClass.setUp(SomeClass.java:233) at acme.SomeClass.<init>(SomeClass.java:57) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100) ... 57 more Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on acme.Referer.referenced references an unknown entity: acme.Referenced at org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:81) at org.hibernate.cfg.AnnotationConfiguration.processFkSecondPassInOrder(AnnotationConfiguration.java:499) at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:304) at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1121) at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1225) at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:159) at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:854) at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:191) at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:253) ... 67 more maven-surefire-plugin defines its forkMode property as follows at <http://maven.apache.org/plugins/maven-surefire-plugin/test-mojo.html>;: forkMode String Option to specify the forking mode. Can be "never", "once" or "always". "none" and "pertest" are also accepted for backwards compatibility. Default value is once. I am baffled as to why hiberante EntityManager is behaving working when forkMode is set to "none" but fails when forkMode is set to default of "once". It seems like a classloader related issue. Here are the hibernate related jars in my webapp: org.hibernate:hibernate-search:jar:3.0.1.GA org.hibernate:hibernate:jar:3.2.6.ga org.hibernate:hibernate-entitymanager:jar:3.3.2.GA org.hibernate:hibernate-commons-annotations:jar:3.0.0.ga org.hibernate:ejb3-persistence:jar:1.0.1.GA org.hibernate:hibernate-annotations:jar:3.3.1.GA This issue may possibly be related to following issue: <http://opensource.atlassian.com/projects/hibernate/browse/EJB-199>