Exception when loading inheritance mapping in single file --------------------------------------------------------- Key: HHH-1175 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1175 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.1 rc3 Reporter: Barthel Steckemetz Assignee: Steve Ebersole Priority: Minor Fix For: 3.2.0.cr2 Attachments: HbmBinder.patch, single.zip, split.zip We are trying to mix inheritance strategies. We already have difficulties loading the mappings at configuration time. If we specify all mappings in a single mapping file (attached single.zip) we get the following error: org.hibernate.MappingException: Could not read mappings from resource: com/ifbag/okular/base/hibernate/tst/HibBase.hbm.xml at org.hibernate.cfg.Configuration.addResource(Configuration.java:483) at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1421) at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1389) at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1370) at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1346) at org.hibernate.cfg.Configuration.configure(Configuration.java:1281) at de.ifbfag.base.db.HConfiguration.configure(HConfiguration.java:53) at de.ifbfag.base.db.HConfiguration.configureDBManager(HConfiguration.java:130) at com.ifbag.okular.base.hibernate.tst.HibTestInit.init(HibTestInit.java:41) at com.ifbag.okular.base.hibernate.tst.HibCrk.main(HibCrk.java:42) Caused by: org.hibernate.MappingException: Cannot extend unmapped class com.ifbag.okular.base.hibernate.tst.HibSub at org.hibernate.cfg.HbmBinder.getSuperclass(HbmBinder.java:2772) at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:116) at org.hibernate.cfg.Configuration.add(Configuration.java:384) at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:425) at org.hibernate.cfg.Configuration.addResource(Configuration.java:480) ... 9 more When we split up the mapping file into two (split.zip) everything works. The problem is in HbmBinder bindRoot: Iterator subclassnodes = hmNode.elementIterator( "subclass" ); while ( subclassnodes.hasNext() ) { Element subnode = (Element) subclassnodes.next(); PersistentClass superModel = getSuperclass( mappings, subnode ); handleSubclass( superModel, mappings, subnode, inheritedMetas ); } Iterator joinedsubclassnodes = hmNode.elementIterator( "joined-subclass" ); while ( joinedsubclassnodes.hasNext() ) { Element subnode = (Element) joinedsubclassnodes.next(); PersistentClass superModel = getSuperclass( mappings, subnode ); handleJoinedSubclass( superModel, mappings, subnode, inheritedMetas ); } The example class HibSubSub can not be loaded in hmNode.elementIterator( "subclass" ), since it depends on HibSub which is not yet loaded in hmNode.elementIterator( "joined-subclass" ); I do not know if there is a simple solution. Seems to be a general problem when mappings referentiate each other.