Session Timeout Issue

Vaadin 6 / 7 / 8
1

Hello,

It seems that the heartbeat is ignored by my UI and so that the session expires after the configured session timeout delay.
For my tests, I have configured my app with short timeout and heartbeat to be easily tested. I use the following conf (in the web.xml file)

<session-config>
    <session-timeout>2</session-timeout> <!-- in minutes = 4h -->
  </session-config>
  <context-param>
    <description>Vaadin production mode</description>
    <param-name>productionMode</param-name>
    <param-value>false</param-value><!--  Issues with style.css sass compiler while in production mode -->
  </context-param>
  <context-param>
    <param-name>heartbeatInterval</param-name>
    <param-value>60</param-value><!--  in seconds -->
  </context-param

When I consult the tomcat access log, I can see the heartbeat calls each minutes


0:0:0:0:0:0:0:1 - - [10/juin/2016:08:49:42 +0200]
 "POST /HubUI/HEARTBEAT/?v-uiId=0 HTTP/1.1" 200 - "https://mcmcmwks075.efgz.efg.corp:8443/HubUI/" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
0:0:0:0:0:0:0:1 - - [10/juin/2016:08:50:42 +0200]
 "POST /HubUI/HEARTBEAT/?v-uiId=0 HTTP/1.1" 200 - "https://mcmcmwks075.efgz.efg.corp:8443/HubUI/" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
0:0:0:0:0:0:0:1 - - [10/juin/2016:08:51:42 +0200]
 "POST /HubUI/HEARTBEAT/?v-uiId=0 HTTP/1.1" 200 - "https://mcmcmwks075.efgz.efg.corp:8443/HubUI/" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
0:0:0:0:0:0:0:1 - - [10/juin/2016:08:52:42 +0200]
 "POST /HubUI/HEARTBEAT/?v-uiId=0 HTTP/1.1" 410 1090 "https://mcmcmwks075.efgz.efg.corp:8443/HubUI/" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"

As you can see, after 2 minutes of inactivity (or a little bit more), I got a session Expired in the browser UI and the heartbeat got a HTTP 410 “Gone”.

I am using a filter with waffle (http://dblock.github.io/waffle/) to make Windows SSO.
I have looked for similar issues but found nothing.
Does somebody have a guess to help me identify the source of my problem.

Thanks a lot for your help