Vaadin-Spring/Vaadin-CDI and CloudServices (Openshift, Bluemix, etc.)

Hey guys,

I wanted to ask if anyone of you has experiences with Vaadin with Vaadin-Spring or Vaadin-CDI addons running on a cloud service like Openshift or Bluemix.

Background are the rules an limitations for GAE (https://vaadin.com/book/-/page/advanced.gae.html):
“Avoid using the session for storage, usual App Engine limitations apply (no synchronization, that is, it is unreliable).”

As far as I know vaadin-spring and vaadin-cdi both use session for storing scopes and such stuff. Is this going to be a problem on cloud services?
Is there maybe a way to bypass the problems?

Regards,
Samuel