ManyToMany from and to the same object by using a non primary key column ------------------------------------------------------------------------ Key: ANN-835 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-835 Project: Hibernate Annotations Issue Type: Bug Affects Versions: 3.4.0.GA Environment: Core 3.3.1.GA, Annotations 3.4.0, Postgres 8.3, JBoss 4.2.3 JDK6, Seam 2.1.1.GA Reporter: Frank Pfleger A ManyToMany relationship to the same table and the same property produces a MappingException on JBoss startup. Caused by: org.hibernate.MappingException: Duplicate property mapping of _org_weazel_security_entity_impl_Group_groups found in org.weazel.security.entity.impl.Group at org.hibernate.mapping.PersistentClass.checkPropertyDuplication(PersistentClass.java:477) at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:467) at org.hibernate.mapping.RootClass.validate(RootClass.java:215) at org.hibernate.cfg.Configuration.validate(Configuration.java:1135) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1320) at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669) ... 145 more An Example Annotation that works fine between different tables and objects (NUMBER is a non primary key column/property) @ManyToMany @JoinTable(joinColumns=@JoinColumn(name="NUMBER1", referencedColumnName="NUMBER")), inverseJoinColumns=@JoinColumn(name="NUMBER2", referencedColumnName="NUMBER")) Using this Annotation between different classes works fine as said before. The Problem is the syntheticPropertyName (_org_weazel_security_entity_impl_Group_groups) generated in BinderHelper.createSyntheticPropertyReference which is the same for both parts/ends of the ManyToMany relationship. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira