hibernate/hibernate-orm · error · AnnotationException

Entity class '<className>' is annotated '@DiscriminatorColum

Error message

Entity class '<className>' is annotated '@DiscriminatorColumn' but it is not the root of the entity inheritance hierarchy

What it means

Error "Entity class '<className>' is annotated '@DiscriminatorColumn' but it is not the root of the entity inheritance hierarchy" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/boot/model/internal/EntityBinder.java:1040

		}
	}

	/**
	 * Process all discriminator-related metadata per rules for "single table" inheritance
	 */
	private AnnotatedDiscriminatorColumn processSingleTableDiscriminatorProperties(InheritanceState inheritanceState) {
		final var discriminatorColumn = annotatedClass.getAnnotationUsage( DiscriminatorColumn.class, modelsContext() );
		final var discriminatorFormula = getOverridableAnnotation( annotatedClass, DiscriminatorFormula.class, context );

		if ( !inheritanceState.hasParents()
				|| annotatedClass.hasAnnotationUsage( Inheritance.class, modelsContext() ) ) {
			return buildDiscriminatorColumn( discriminatorColumn, discriminatorFormula,
					null, DEFAULT_DISCRIMINATOR_COLUMN_NAME, context );
		}
		else {
			// not a root entity
			if ( discriminatorColumn != null ) {
				throw new AnnotationException( "Entity class '" + annotatedClass.getName()
						+  "' is annotated '@DiscriminatorColumn' but it is not the root of the entity inheritance hierarchy");
			}
			if ( discriminatorFormula != null ) {
				throw new AnnotationException( "Entity class '" + annotatedClass.getName()
						+  "' is annotated '@DiscriminatorFormula' but it is not the root of the entity inheritance hierarchy");
			}
			return null;
		}
	}

	/**
	 * Process all discriminator-related metadata per rules for "joined" inheritance, taking
	 * into account {@value AvailableSettings#IMPLICIT_DISCRIMINATOR_COLUMNS_FOR_JOINED_SUBCLASS}
	 * and {@value AvailableSettings#IGNORE_EXPLICIT_DISCRIMINATOR_COLUMNS_FOR_JOINED_SUBCLASS}.
	 */
	private AnnotatedDiscriminatorColumn processJoinedDiscriminatorProperties(InheritanceState inheritanceState) {
		final var modelContext = modelsContext();

View on GitHub (pinned to fad1729dce)

Solutions

1. Move @DiscriminatorColumn to the root class of the entity inheritance hierarchy.

When it happens

Trigger: An annotation restricted to the root of an inheritance hierarchy is placed on a subclass (or the hierarchy rules are otherwise violated).

Common situations: SINGLE_TABLE/JOINED hierarchies where @Table, @DiscriminatorColumn, @DiscriminatorFormula, @Cache, @Immutable, @Id or @Version are declared on the wrong class of the hierarchy.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/0a68345f18c537f7. Report an issue: GitHub.