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CssImport when using Component Exporter by Mikhail Shabarov, 1 month ago
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Vaadin Forum3. Vaadin 6, 7, 8

Session Expired on google app engine(GAE)

yunfeng lu
10 years ago Apr 29, 2012 7:56am

I write a small vaadin app and deployed it onto google GAP http://caraccidentonline.appspot.com/, when I pressed one of two combox button, it show

Session Expired
Take note of any unsaved data, and click here to continue.

but if it run on local host, it' OK, how do I deal with this bug?

Band Loonatikk
10 years ago Apr 29, 2012 8:46am

Maybe one of the classes you have declared within you application does not implement java.io.Serializable.

Last updated on Apr, 29th 2012
Artur Signell
10 years ago Apr 30, 2012 9:20am

Sounds like you are not using the GAEApplicationServlet instead of ApplicationServlet. Google App Engine requires some special handling regarding the session and this is implemented in GAEApplicationServlet