Laurent Almeras ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-16641 ( https://hibernate.atlassian.net/browse/HHH-16641?atlOrigin=eyJpIjoiZmE2NW... ) Re: @OrderColumn fails for a generic collection with NPE on XProperty.getMapKey() ( https://hibernate.atlassian.net/browse/HHH-16641?atlOrigin=eyJpIjoiZmE2NW... ) Minimal test-case can be found here : https://github.com/hibernate/hibernate-test-case-templates/commit/d73b8d2... cd orm/hibernate-orm-5 mvn clean verify # OK cd ../../orm/hibernate-orm-6 mvn clean verify # failure Tests in error: hhh16641Test(org.hibernate.bugs.JPAUnitTestCase): Cannot invoke "org.hibernate.annotations.common.reflection.XClass.getName()" because the return value of "org.hibernate.annotations.common.reflection.XProperty.getMapKey()" is null hhh16641Test(org.hibernate.bugs.JPAUnitTestCase): Cannot invoke "jakarta.persistence.EntityManagerFactory.close()" because "this.entityManagerFactory" is null For both orm/hibernate-orm-5 and orm/hibernate-orm-6 : * WithoutGenericEntity → TargetEntityWithoutGeneric : works OK with Hibernate 5 / 6 * WithGenericConcrete → TargetEntityWithGeneric : works OK with Hibernate 5 ; fails with Hibernate 6 Unit test only tries to startup EntityManagerFactory ; no other operation. If WithGenericConcrete / TargetEntityWithGeneric is removed from entities : OK If @OrderColumn is removed on generic collection : OK ( https://hibernate.atlassian.net/browse/HHH-16641#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16641#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100225- sha1:9dd72a2 )