See also: http://stackoverflow.com/questions/11698488/unable-to-query-with-mapsid-and-id-but-works-just-with-id

I have two entities, one of which uses the other's PK as its own:

@Entity
public class Firm {
...
@Id
@Column(...)
public Long getId()

@OneToOne
@MapsId
@JoinColumn(...)
public Firm getFirm()

}

Attempting a query such as the following results in "Missing IN or OUT parameter at index:: 1"

Firm f = em.find(Firm.class, 1461L);
assertNotNull(f);
TypedQuery<FirmContactInfo> q = em.createQuery(
"SELECT fci "
+ "FROM FirmContactInfo fci "
+ "WHERE fci.firm IN (:firms)", FirmContactInfo.class);
q.setParameter("firms", f);
FirmContactInfo fci = q.getSingleResult();
assertNotNull(fci);

Pulling out Firm ids and searching based on FirmContactInfo.id does work, but that's not always convenient.