I tried to do what you mentioned here, but seems no lucky.

On Mar 31, 1:21 pm, John Patterson <jdpatter...@gmail.com> wrote:
> Looks like you have a class path problem.  Do you have different  
> versions of the app engine jars in your WEB-INF/lib dir?
>
> On 31 Mar 2010, at 09:18, Featheast Lee wrote:
>
>
>
> > I have updated my app engine to 1.3.2 a couple of days ago, and it
> > runs well on the cloud. Today, when I trying to some testing on my
> > local machine, an exception throws out whenever I try to use the PMF
> > code:
> >       PersistenceManager pm = PMF.get().getPersistenceManager();
>
> > Basically the exceptions stacks are:
> >       Internal Server Error (500) - The server encountered an
> > unexpected condition which prevented it from fulfilling the request
> >       ................
> >       Caused by: java.lang.NoSuchMethodError:
> > com
> > .google
> > .appengine
> > .api.datastore.DatastoreServiceFactory.getDatastoreService(Lcom/
> > google/appengine/api/datastore/DatastoreServiceConfig;)Lcom/google/
> > appengine/api/datastore/DatastoreService;
>
> > At first, I thought it is the problem of my newly added code, however,
> > after several attempts, all failed no matter what change i made.
> > Then I thought it might be the issue of SDK, after I switched back my
> > app engine to 1.3.1, it works perfect.
>
> > But how can the same code runs well in the cloud, but failed in my
> > local machine with different versions?
>
> > Anyone can give me some idea? Thanks.
>
> > PS: my test code is a pretty simple client code generate a GET method
> > to the app engine project, and a datastore query will be called, the
> > exception happens when the PMF is called.
>
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