org.hibernate.MappingException: Could not instantiate id generator [entity-name=XYZEntity]

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Root Cause Analysis

  1. org.hibernate.MappingException

    Could not instantiate id generator [entity-name=XYZEntity]

    at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.createIdentifierGenerator()
  2. Hibernate
    Configuration.buildSessionFactory
    1. org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.createIdentifierGenerator(DefaultIdentifierGeneratorFactory.java:123)
    2. org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:195)
    3. org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:318)
    4. org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1797)
    4 frames
  3. Hibernate EJB
    EntityManagerFactoryImpl.<init>
    1. org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:96)
    1 frame