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Error "java.lang.NullPointerException " at test run for GAE + Vaadin

Deleted User
1 decade ago May 23, 2010 1:28pm
Deleted User
1 decade ago May 27, 2010 3:47pm
Artur Signell
1 decade ago May 28, 2010 7:32am

Do I understand you correctly that you try to run a GAE application on a local Tomcat? If this is the case it won't work as GAE / GAEApplicationServlet uses services only available in GAE, for instance memcache. Sure, you might get it to work if you install all services manually in your Tomcat but the preferred way is to use the local development server included in Google's App Engine Eclipse plugin. This uses an environment similar to GAE and works out of the box with Vaadin.

Vaadin wiki contains instructions on how to start development with GAE: http://vaadin.com/wiki/-/wiki/Main/Google%20AppEngine%20HOWTO although I do not think it talks very much about the development server.

Ha Dao
1 decade ago Oct 07, 2010 9:11am

Hi,

Try to run (debug) with "Web Application" using eclipse plugin.
(Vaadin 6.4.5 GAE1.3.7 Eclipse 3.6)