Georg Echterling ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiN2UzNDEwMDFh... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15784?atlOrigin=eyJpIjoiN2UzND... ) HHH-15784 ( https://hibernate.atlassian.net/browse/HHH-15784?atlOrigin=eyJpIjoiN2UzND... ) Primitive array as Natural ID causes ClassCastException ( https://hibernate.atlassian.net/browse/HHH-15784?atlOrigin=eyJpIjoiN2UzND... ) Issue Type: Bug Affects Versions: 6.1.5 Assignee: Unassigned Components: hibernate-core Created: 30/Nov/2022 02:48 AM Priority: Major Reporter: Georg Echterling ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Annotating a byte[] field with @NaturalId causes a ClassCastException when trying to persist the entity. This happens because SimpleNaturalIdMapping.validateInternalForm tries to cast the primitive array to Object[]. class [B cannot be cast to class [Ljava.lang.Object; ([B and [Ljava.lang.Object; are in module java.base of loader 'bootstrap') java.lang.ClassCastException: class [B cannot be cast to class [Ljava.lang.Object; ([B and [Ljava.lang.Object; are in module java.base of loader 'bootstrap') at org.hibernate.metamodel.mapping.internal.SimpleNaturalIdMapping.validateInternalForm(SimpleNaturalIdMapping.java:115) at org.hibernate.engine.internal.NaturalIdResolutionsImpl.isValidValue(NaturalIdResolutionsImpl.java:507) at org.hibernate.engine.internal.NaturalIdResolutionsImpl.cacheResolutionLocally(NaturalIdResolutionsImpl.java:102) at org.hibernate.engine.internal.NaturalIdResolutionsImpl.manageLocalResolution(NaturalIdResolutionsImpl.java:170) at org.hibernate.action.internal.AbstractEntityInsertAction.handleNaturalIdPreSaveNotifications(AbstractEntityInsertAction.java:197) at org.hibernate.action.internal.AbstractEntityInsertAction.<init>(AbstractEntityInsertAction.java:63) at org.hibernate.action.internal.EntityInsertAction.<init>(EntityInsertAction.java:58) at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:363) at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:267) at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:173) at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:133) at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:175) at org.hibernate.event.internal.DefaultPersistEventListener.persist(DefaultPersistEventListener.java:93) at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:77) at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:54) at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:107) at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:746) at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:730) at org.hibernate.orm.test.uniquekey.PrimitiveArrayNaturalIdTest.testPersistByteArrayNaturalId(PrimitiveArrayNaturalIdTest.java:33) ( https://hibernate.atlassian.net/browse/HHH-15784#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15784#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#100210- sha1:fb625d0 )