for the last few days i desperately try to get a Vaadin 7 Project on Google App Engine and i can’t for the live of me get it to work. I use Eclipse Luna(with the eclipse Plug-In for Eclipse and the Google Plug-In for Eclipse) and Vaadin 7.3.8. I used the Vaadin Wizard to create the project.
The resulting project without any modification threw a bunch of exception that didn’t stop the application from running (they seem to be about Atmosphere) when I tried it by Run on Server > Google App Engine Development Server.
When I added the coding for the project sometimes it loads the initial UI and shows a Communication Problem on Interaction with it and sometimes it will throw a NotSerializableException on the UI class. Sometimes it also doesn’t fully load and only shows the spinning loading indicator.
When i try to Google > Deploy to AppEngine it fails saying the project is not an AppEngine Project.
I tried it several times now with different web.xml settings, different coding but nothing worked.
I ran out of ideas now and for the time deployed it on the Jelastic Vaadin Cloud which worked without problem but i don’t really trust their “free unlimited trail”.
Does someone has any idea if there are any problems with that release or if i’m doing something wrong?
If you need more information please let me know.
Sry for the late reply but i looked at what was different in the tutorial to what i was doing already. After that i was able to deploy to App Engine but not able to load the application. In the logs i was getting a few exceptions having to do with atmosphere not being able to load and after doing a ?restartApplication I get only one com.vaadin.server.ServiceExceptiontelling me that my UI class can not be loaded.