Starting in 5.3.2 (due to HHH-12654), a MappingException is thrown if @AttributeOverride or @AttributeOverrides is used on a subclass in an entity hierarchy.

Those annotations should be allowed for TABLE_PER_CLASS hierarchies, but Hibernate does not support it yet.

Until HHH-12654 was fixed, Hibernate simply ignored those annotations.

The exception is causing problems for existing applications because the SessionFactory can no longer be built.

HHH-13172 logs a warning instead, that says that the mapping is ignored.