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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