[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-2980) Error "org.hibernate.HibernateException: cannot simultaneously fetch multiple bags" not specific enough

[Emmanuel Bernard (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Emmanuel Bernard updated HHH-2980:
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    Priority: Minor  (was: Major)

No it's actually way more complex than that:
 - eager fetching is not the problem per se
 - using multiple joins in one SQL query is
 - it's not limited to the static fetching strategy
 - it has never been supported (property), because it's conceptually not possible

So really the best message we have found so far is "cannot simultaneously fetch multiple bags"

> Error "org.hibernate.HibernateException: cannot simultaneously fetch multiple bags" not specific enough
> -------------------------------------------------------------------------------------------------------
>
>                 Key: HHH-2980
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2980
>             Project: Hibernate3
>          Issue Type: Improvement
>    Affects Versions: 3.2.5
>            Reporter: Dobes Vandermeer
>            Priority: Minor
>
> When I get this exception:
> org.hibernate.HibernateException: cannot simultaneously fetch multiple bags
> I don't know what to do except google.  Why not spruce it up a little to say something like:
> For class X, multiple collection fields are marked for eager fetching: a, b, c; this is not supported by Hibernate in releases after 3.2.x

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