steps to reproduce

configure automatic timeout and a timeout page

	<session-config>
		<automatic-timeout />
		<timeout-uri>/timeout.zul</timeout-uri>
		<timer-keep-alive>false</timer-keep-alive>
	</session-config>

and run the attached examples, which both use a timeout of 12 seconds

actual result

timeout-redirect-noSP.zul -> times out/redirects after 17 seconds (12+5 seconds)

timeout-redirect.zul -> times out after 17 seconds (SP gets stopped) and redirects after another 17 seconds

expected result

both pages should redirect after the same time ~17seconds

debug info

in a working case after the timeout the client side sends a "dummy" request to the server which responds with a header ZK-Error=410 resulting in the timeout redirect.

when using the server push the "dummy" request doesn't respond with a 410 ZK-error header, which results in a call to zAu._resetTimeout() in au.js Line177 ; extending the session.
Still the server push is stopped correctly at client side

root cause

something at server side misses to set the 410 response header when the server push is active so that the client engine waits twice as long before redirecting