I'm having org.hibernate.AnnotationException: Property xxx has an unbound type and no explicit target entity.

Solution Verified - Updated -

Issue

  • The following exception is thrown when Java Persistence API starts:

    javax.persistence.PersistenceException: [PersistenceUnit: IP-PU] Unable to configure EntityManagerFactory
     at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:265)
     at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:125)
     ...
    Caused by: org.hibernate.AnnotationException: Property xxx has an unbound type and no explicit target entity. Resolve this Generic usage issue or set an explicit target attribute (eg @OneToMany(target=) or use an explicit @Type
    
     at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:191)
     at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:253)
     ... 32 more
    

Environment

  • Enterprise Application Platform
    • 5.0
  • Java Persistence API (JPA)
    • 1.0
  • Domain Model being  (pseudo code)

    @MappedSuperclass
    absctract Person {...}
    
    @Entity
    Male extends Person{...}
    
    @Entity
    MyEntity {
    ...
    @OneToMany
    private Set persons;
    ...
    }
    

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