Could you please give more information on the steps needed to solve this, I
am new to this and I've wasted an awful lot of time trying to figure this
out. Thank you in advance!
On Wednesday, January 11, 2012 1:44:31 PM UTC+2, Cláudio Coelho wrote:
>
> Solved. Different developers were working with different versions of
> gae and the datanucleous plugin was therefore being registered twice.
>
> On Jan 11, 11:20 am, Cláudio Coelho <ereb...@gmail.com> wrote:
> > Hi all,
> > I'm using the same helper class (depicted at the bottom of the email)
> > to maintain a singleton of the PersistenceManageFactory as I've used
> > in previous projects, however, in one of my projects, it was working
> > as always, and suddenly I get a NoClassDefFoundError Exception. I made
> > sure the .class file was where it was supposed to be, and then I
> > further investigated it. Turns out that the line causing the exception
> > is the pmfInstance field. Whenever I take that out, the class if
> > found, when I have it in, its not found. I have no clue what I've done
> > to cause this. We have some issues with mercurial, so in the process
> > of fixing a merge I might have done something to cause this, but I
> > really can't find anything. It's probably something really simple as
> > something for JDO having to be declared somewhere, but I just can't
> > find it.
> >
> > This is probably a rather silly problem, but does anybody have a clue
> > of how to solve it?
> >
> > Cheers
> >
> > C.
> >
> > import javax.jdo.JDOHelper;
> > import javax.jdo.PersistenceManagerFactory;
> >
> > public final class PMF {
> > private static final PersistenceManagerFactory pmfInstance =
> > JDOHelper
> >
> .getPersistenceManagerFactory("transactions-optional");
> >
> > private PMF() {
> > }
> >
> > public static PersistenceManagerFactory get() {
> > return pmfInstance;
> > }
> >
> >
> >
> >
> >
> >
> >
> > }
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