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From Kevin Sutter <kwsut...@gmail.com>
Subject Re: Exception onstartup
Date Thu, 15 Dec 2011 20:39:37 GMT
I'm glad you were able to find the cause of the problem.  And, thanks for
posting back to the mailing list with the resolution.

Kevin

On Wed, Dec 14, 2011 at 11:58 AM, seba.wagner@gmail.com <
seba.wagner@gmail.com> wrote:

> to answer my own question:
>
> It was not really connected to OpenJPA, the reason for that exception was a
> conflict between java-ee-5.1.2.jar and another jar that contains the
> javax.persistence.* packages.
> By modifying java-ee-5.1.2.jar to have only a single version of the
> javax.persistence.* packages in the classpath the issue was fixed.
>
> Thanks,
> Sebastian
>
> 2011/12/9 seba.wagner@gmail.com <seba.wagner@gmail.com>
>
> > Hi,
> >
> > some users of (Apache) Openmeetings report following exception to our
> > mailing lists:
> >
> > *javax.persistence.PersistenceException: Found
> > 'javax.persistence.provider' property in the map but the value is not a
> > String. Found object : 'null'.*
> >
> > You can find hardly anything about this exception in the net and I tested
> > on various platforms ... never had this issue.
> >
> > Is there a known problem or root cause for this exception?
> > It seems to me like a problem with finding the persistence.xml.
> >
> > Thanks!
> > Sebastian
> >
>
>
>
> --
> Sebastian Wagner
> http://www.openmeetings.de
> http://www.webbase-design.de
> http://www.wagner-sebastian.com
> seba.wagner@gmail.com
>

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