playframework/playframework — pull request #2751 by jroper (2014-05-05 05:44:56+00:00)
Title: session.maxAge used to be in seconds - now its in millis

You can see from the commit below that for some reason session.maxAge was changed to milliseconds. This is undocumented change that will create unexpected issues

https://github.com/playframework/playframework/blob/master/framework/src/play/src/main/scala/play/api/mvc/Http.scala#L580