Whenever I attempt to use pre-compilation I receive a 503 Service
Unavailable error and a roll back is made.  There is no further
explanation in the logs.  I made several tries at different times.

Unable to update:
java.io.IOException: Error posting to URL:
http://appengine.google.com/api/appversion/precompile?app_id={removed}&version=2&;
503 Service Unavailable

Try Again (503)
An unexpected failure has occurred. Please try again.

        at com.google.appengine.tools.admin.ServerConnection.send
(ServerConnection.java:143)
        at com.google.appengine.tools.admin.ServerConnection.post
(ServerConnection.java:81)
        at com.google.appengine.tools.admin.AppVersionUpload.send
(AppVersionUpload.java:427)
        at com.google.appengine.tools.admin.AppVersionUpload.precompile
(AppVersionUpload.java:135)
        at com.google.appengine.tools.admin.AppVersionUpload.doUpload
(AppVersionUpload.java:112)
        at com.google.appengine.tools.admin.AppAdminImpl.update
(AppAdminImpl.java:56)
        at com.google.appengine.eclipse.core.proxy.AppEngineBridgeImpl.deploy
(AppEngineBridgeImpl.java:271)
        at
com.google.appengine.eclipse.core.deploy.DeployProjectJob.runInWorkspace
(DeployProjectJob.java:148)
        at org.eclipse.core.internal.resources.InternalWorkspaceJob.run
(InternalWorkspaceJob.java:38)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

Am I missing something?

- Philip

On Dec 7, 6:18 pm, "Ikai L (Google)" <ika...@google.com> wrote:
> Yes, pre-compilation reduces the time to load an application. This will
> benefit you on your first request after a deploy, after you've been cycled
> out or if more application instances are created to scale up with your load.
> You will see up to 30% improved loading time on your first request.
> Pre-compilation works by doing a bit of class loading work ahead of time in
> the App Engine environment before the request comes in.
>
> It's still opt-in, so you'll need to enable it if you want it.
>
>
>
> On Thu, Dec 3, 2009 at 4:29 PM, Gary B <gary.b...@gmail.com> wrote:
> > The 1.2.8 release notes state that pre-compilation reduces "the length
> > of loading requests".  Does pre-compilation reduce the *time* to load
> > the application?
>
> > How does pre-compilation work? I noticed that the appcfg update
> > command logs information about precompilation.
>
> > --
>
> > You received this message because you are subscribed to the Google Groups
> > "Google App Engine for Java" group.
> > To post to this group, send email to
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>
> --
> Ikai Lan
> Developer Programs Engineer, Google App Engine

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