Have you enabled session ? By default it is read-only. WEB-INF/appengine-web.xml.
<sessions-enabled>true</sessions-enabled> http://code.google.com/appengine/docs/java/config/appconfig.html ------- Enabling Sessions App Engine includes an implementation of sessions, using the servlet session interface. The implementation uses the App Engine datastore and memcache to store session data. This feature is off by default. To turn it on, add the following to appengine-web.xml: <sessions-enabled>true</sessions-enabled> ------------------------- --~--~---------~--~----~------------~-------~--~----~ 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 google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
