title: MultipleBagFetchException thrown by Hibernate
body: <p>I want to have an option in my repository layer to eager load entites, so I tried adding a method that should eager load a question entity with all the relationships, but it throws MultipleBagFetchException. How can I fix this? I am using Hibernate 4.16.</p>
  
  <pre><code>@NamedQuery(name = Question.FIND_BY_ID_EAGER, query = "SELECT q FROM Question q LEFT JOIN FETCH q.answers LEFT JOIN FETCH q.categories LEFT JOIN FETCH q.feedback LEFT JOIN FETCH q.participant WHERE q.id = :id"),
  </code></pre>
  
  <p>How do I get a question object which is initially lazy loaded, to be eager loaded with all relations?</p>