Vaadin application is disabled during debug

I found my Vaadin application is disabled after I stop it for a few minutes at break points during Eclipse debug. My web.xml has the following configuration for session.


I don’t like it because I have to refresh it each time. How do I fix it?



Chrome console has the following log info from com.vaadin.client.communication.MessageHandler

Response didn’t contain a server id. Please verify that the server is up-to-date and that the response data has not been modified in transmission.