We are using the combination of session-timeout and timer-keep-alive settings to time out a session as soon as the browser is closed.

In zk.xml, we set the session timeout to 20 seconds:
<session-config>
<session-timeout>20</session-timeout>

It means, we expect the session to be timed out after ~20 seconds, when the browser window is closed.

During our tests we got different results on different platforms:

• Tomcat: after 1 minute
• WebSphere cluster: after 2 minutes
• WebLogic cluster: after 45 seconds

We are now wondering how to interpret this result and why such differences exist. Do you have an idea?