I have uploaded google app java project to production google app engine (from this tutorial), but I can't found any information how to stop or disable the production app engine.
From google developer console, I can shutdown the instance via menu Compute -> Instances, but if I open or access the app's url in the browser, the app instance will start running again.
So how to completely stop or disable Google App Engine production server?
Change you code to not serve pages and update the server online, or use the admin console and change the security settings so no one can see it.
i.e. go here.. https://appengine.google.com/ if you have a google app account then you should see that there's a "Disable or Delete Application" section.