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Hibernate @ManyToOne references an unknown entity

I am receiving the following Hibernate Exception:

@OneToOne or @ManyToOne on Matchup.awayTeam references an unknown entity: Team

The simplified Matchup class looks like this:

@Entity public class Matchup implements Serializable 
{
   protected Team awayTeam;

   @ManyToOne 
   @JoinColumn(name="away_team_id")
   public Team getAwayTeam() {
      return awayTeam;
   }
}

The simplified Team class looks like this:

@Entity
public class Team implements Serializable {
    protected List<Matchup> matchups;

    @OneToMany(mappedBy="awayTeam", targetEntity = Matchup.class,
    fetch=FetchType.EAGER, cascade=CascadeType.ALL)
    public List<Matchup> getMatchups() {
       return matchups;
    }
}

Notes:

  • Both Matchup and Team have subclasses. I’m not sure if this impacts the situation.
  • Both Matchup and Team are listed in my persistence.xml as being included.
  • If I put @Transient annotations on both getter methods, the error disappears.

Can anybody shed light on why this exception is occurring?

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Answer

I figured out the problem: I was not adding class Team to the Hibernate AnnotationConfiguration object. Thus, Hibernate was not recognizing the class.

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