They are hidden at the OS level, which seems to hide them in Eclipse
as well.

On Aug 19, 9:08 am, Miguel Méndez <mmen...@google.com> wrote:
> Are these directories hidden at the OS level or at the eclipse level (like a
> derived folder)?
>
>
>
>
>
> On Wed, Aug 19, 2009 at 11:52 AM, Rajeev Dayal <rda...@google.com> wrote:
> > Glad that everything is working for you. The deployment process does indeed
> > grab everything under the war directory, including those that are hidden.
> > However, I think it's a reasonable option to ignore hidden directories
> > during an application upload. I've added Miguel and Don to this thread so
> > they can weigh in on this.
>
> > On Wed, Aug 19, 2009 at 2:27 AM, Geoff Denning <gdenn...@gmail.com> wrote:
>
> >> Hi Rajeev,
>
> >> I finally just figured out what was causing my app to fail, thanks to
> >> your help.  I looked at the stack trace more closely, and noticed this
> >> near the end:
>
> >> Caused by: org.datanucleus.exceptions.NucleusException: Plugin
> >> (Bundle) "org.datanucleus" is already registered. Ensure you dont have
> >> multiple JAR versions of the same plugin in the classpath. The URL
> >> "file:/base/data/home/apps/taskpathapp/1-2.335721585450873497/WEB-INF/
> >> lib/_sgbak/datanucleus-core-1.1.0.jar.
> >> 22581.1.2009-07-13.20-12-57.3906" is already registered, and you are
> >> trying to register an identical plugin located at URL "file:/base/data/
> >> home/apps/taskpathapp/1-2.335721585450873497/WEB-INF/lib/datanucleus-
> >> core-1.1.4-gae.jar."
>
> >> The reason for this is that I am using SourceGear Vault for source
> >> code control, which creates a hidden directory called _sgbak in the
> >> working directory whenever a file is overwritten.  Apparently one of
> >> those files was an old version of the datanucleus-core jar, and
> >> Eclipse (or perhaps the GWT plugin) seems to include hidden
> >> directories when compiling and/or uploading to Google App Engine.
> >> After deleting these directories (and instructing Vault to put them in
> >> a separate folder) everything is working perfectly.  Thanks a million
> >> for your help.
>
> >> On Aug 14, 8:39 am, Rajeev Dayal <rda...@google.com> wrote:
> >> > Hi Geoff,
> >> > Your classpaths look correct. The only thing somewhat suspect is that
> >> you
> >> > have xercesImpl.jar in your war/WEB-INF/lib folder, and gwt-gears.jar
> >> > contains a set of Xerces classes itself. However, if you had this
> >> working
> >> > before you upgraded the App Engine SDK, there is no reason as to why it
> >> > would break now.
>
> >> > Can you verify that the timestamp on gwt-servlet.jar matches that of the
> >> > gwt-servlet.jar distributed with GWT 1.7.0?
>
> >> > Also, do you mind pasting the exact stack trace? You mentioned that it
> >> is
> >> > the same as the one that Clint posted. However, you mentioned a
> >> > NoClassDefFound error, and that wasn't listed in Clint's stack trace.
>
> >> > Thanks,
> >> > Rajeev
>
> --
> Miguel
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