Hi all, i need help for a problem that is going to make me crazy 
I’m using Vaadin 7 for a web application that calls external rest services.
every time I start the application, at the first access i get “Session expired” without sense cause it appears immediately.
When i call some services that need some minutes to work, again i get that “Session expired”.
I tried with:
- vaadin.servlet.heartbeat-interval=-1
- server.session.timeout=6000000
but doesn’t work…
Moreover i inserted in web.xml -1
again it doesn’t work…
Can someone help me? this Vaadin session becomes to be enervating!