You can get this error if you have jars in your JDK's lib/ext folder. The
dev_appserver generally rejects any classes that are found there, because
that feature doesn't make sense under App Engine. (I.E. you just put your
jars in WEB-INF/lib instead).
On Tue, Apr 13, 2010 at 10:00 AM, hallmit <hall...@gmail.com> wrote:
> hi folks,
>
> I've had a very strange issue when I'm deploying my web app in local
> server(jetty). I got this message:
>
> Caused by: java.lang.NoClassDefFoundError:
> javax.persistence.Persistence is a restricted class. Please see the
> Google App Engine developer's guide for more details.
> at
>
> com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:
> 51)
>
> The offending code is :
> _emf =
> Persistence.createEntityManagerFactory(aPersistenceUnitName);
>
> But javax.persistence.Persistence is not a restricted class because I
> have already used it in other application. I don't understand why I'm
> getting this message. my business classes are embedded in a .jar
> archive that I put in WEB-INF/lib.
> I copied all jars from ${sdk.dir}/lib/user to my WEB-INF/lib too.
>
> I use:
> sdk 1.3.1
>
> any ideas?
>
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