Calling IdentityManager.grantRole() using the JPA IDM store while using EclipseLink as the JPA implementation results in this exception: http://pastebin.com/TS9dubuk

Unlike with PLINK-104, I'm not sure what causes this. I think it has something to do with the subquery created for the RelationshipQueryParameter in JPAIdentityStore.fetchQueryResults(), but I'm not certain.