Vaadin Session Timeouts happening before the session timeout

Good Morning,
I’m running into an issue where the session is timing out anywhere between 5 and 20 minutes. This is happening very sparatically. About half the time, the session is timing out at 90 minutes (from web.xml). After thinking that the heartbeat could’ve caused this, I disabled the heartbeat and received the same results. Have anyone else experienced this?

My web.xml currently contains the following:
Enable Session TimeoutcloseIdleSessionstrue
90 heartbeatInterval -1

The configuration that we’re using is VAADIN 7.7.3/Tomcat 8.0.41. I have the application setup for Long Polling. I searched through the log files and there are no issues being reported.

Any help would be greatly appreciated.


This was an issue with load balancing rather than Vaadin. This has been fixed and the application session timeouts are now active.