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spring: jpa: properties: hibernate: dialect: org.hibernate.dialect.OracleDialect I'm not creating any custom HibernateJpaVendorAdapter and I also don't see the warning bclozel posted.
Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.collection.OneToManyPersister at org.hibernate.persister.internal.PersisterFactoryImpl.create ...