Vaadin Portlet + Weblogic + Liferay deserialization issue

Hi

I have created a vaadin portlet in liferay.
It works well on tomcat+Liferay but on Weblogic+Liferay, When my portlet is loaded on the page I get the following error on the console (logs)

<Could not deserialize session data.java.lang.ClassCastException: cannot assign instance of demo.test.application.ManageIncidentApplication to field com.vaadin.terminal.gwt.server.AbstractCommunicationManager.application of type com.vaadin.Application in instance of com.vaadin.terminal.gwt.server.PortletCommunicationManager

My Class demo.test.application.ManageIncidentApplication is the application class extending com.vaadin.Application.

Please Suggest.

Hi,

Is it a bug?
I have even talked to liferay support and Oracle support (Weblogic) on this particular topic.
They say its not because of Liferay or Weblogic Server.

Can people from vaadin shed some light on this issue?

-L P