Liferay Vaadin portlet Session time out problem???

Hi Every one,

First let me wish you a wonderful Happy New Year :grin: . Coming Back to my Issue , I am Experiencing the problem of
session time out
when i am using
Vaadin Liferay Portlet
. As per Liferay Recommendations i have set session time in the following liferay files

Root.war\WEB_INF\web.xml :


And Liferay

session related

session.timeout=2 # Can be any value

As per above configuration , i should suppose to kickoff from liferay if am ideal for 2 mins(Confirm me guys if i am wrong ) Which is not happening at my case , even though i am active at client side by using vaadin component liferay is running out of the session. Is there any integration gap between liferay and Vaadin???

Note :
I have executed same use case with liferay MVC portlet where session time out is not happening .

Confirm me guys, is Vaadin interaction with app server via Ajax call hence i am landing up with this problem???

Any suggestions to overcome from this session time out problem with liferay-vaadin portlet is appreciated…

My portlet is build around with the following versions:

      Liferay 6.0.1 CE
      Vaadin 6.7.8
      Jboss AS 7 CE

Thanks & Regards,
Suman Alapati.