[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-4072) ManyToMany with single table inheritance fails when multiple subclasses

ManyToMany with single table inheritance fails when multiple subclasses ----------------------------------------------------------------------- Key: HHH-4072 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4072 Project: Hibernate Core Issue Type: Bug Components: envers Affects Versions: 3.3.2 Environment: Windows XP, Java 1.6 Reporter: david sinclair Priority: Critical I have a base entity named BusinessSoftwareMatrixElement declare as such @Entity @Inheritance(strategy = InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name = "software_type", discriminatorType = DiscriminatorType.STRING) @DiscriminatorValue("Software") @Audited BusinessSoftwareMatrixElement ...{ } I then have a subclass of BusinessSoftwareMatrixElement that is a mapped super class which defines a many to many relationship. @MappedSuperclass @Audited public abstract class BusinessOSProcessServiceMatrixElement extends BusinessSoftwareMatrixElement { private Set<BusinessOSMatrixElement> applicableOperatingSystems = new HashSet<BusinessOSMatrixElement>(); @ManyToMany(fetch = FetchType.LAZY, cascade = {CascadeType.REMOVE, CascadeType.REFRESH }, targetEntity = BusinessOSMatrixElement.class) @JoinTable(name="matrix_elements_procserv_aos", joinColumns=@JoinColumn(name="sw_guid"), inverseJoinColumns = @JoinColumn(name="os_guid")) public Set<BusinessOSMatrixElement> getApplicableOperatingSystems() { return applicableOperatingSystems; } } There are then to subclasses that add no new fields, only different discriminators @Entity @DiscriminatorValue("Database") @Audited public class BusinessDBMatrixElement extends BusinessOSProcessServiceMatrixElement { @Entity @DiscriminatorValue("Application") @Audited public class BusinessAppMatrixElement extends BusinessOSProcessServiceMatrixElement { Running the ant task to create the DDL results in an exception being thrown for that many to many table. Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping matrix_elements_procserv_aos_AUD at org.hibernate.tool.ant.HibernateToolTask.reportException(HibernateToolTask.java:226) at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:189) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275) at org.apache.tools.ant.Task.perform(Task.java:364) at org.apache.tools.ant.Target.execute(Target.java:341) at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:108) ... 24 more Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping matrix_elements_procserv_aos_AUD at org.hibernate.cfg.Mappings.addClass(Mappings.java:141) at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:167) at org.hibernate.cfg.Configuration.add(Configuration.java:716) at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:531) at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:291) at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1162) at org.hibernate.envers.configuration.AuditConfiguration.getFor(AuditConfiguration.java:102) at org.hibernate.envers.ant.AnnotationConfigurationTaskWithEnvers.doConfiguration(AnnotationConfigurationTaskWithEnvers.java:38) at org.hibernate.tool.ant.ConfigurationTask.getConfiguration(ConfigurationTask.java:55) at org.hibernate.tool.ant.HibernateToolTask.getConfiguration(HibernateToolTask.java:302) at org.hibernate.tool.ant.Hbm2DDLExporterTask.createExporter(Hbm2DDLExporterTask.java:51) at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:39) at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)