Hello,
I'm using a combination of ZK, Spring, Spring Security to ensure that the user is logged in correctly into the web app. After switching from ZK 7 to ZK 8 I got a NPE when the session timeout (web.xml) is reached. Up to ZK 7 it worked.

The index page (secure/index.zul) contains a timer that is triggered every minute. When I remove the timer the problem is gone.

When you start the web app you see a login button. Please press it and you are redirected to the index page. Now wait 3 minutes for the timeout and the NPE appears.

I have reduced the Eclipse project to the minimum of required classes, pages, jars. The archive is split into 3 files because it exceeds your limit.

The problem is a blocker because with this problem we cannot switch from ZK 7 to 8.

Thanks in advance
Torsten