Hibernate @ManyToOne references an unknown entity

Question

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?

Answer 1

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