We just made a patch for jbossws implementing two features:

1. The max expiration time and the default expiration time are hard coded in source code. Our patch made these values configurable in SubscriptionManager MBEAN
2. We noticed jbossws throws an InvalideExpirationTime Excetion when we try to subscribe with an expiration time longer than maxLeaseTime. According to specification (5.4) this exception should be used only when the expiration time is in the past or the expiration duration is zero. It should answer with a valid registration forcing expiration time to maxLeaseTime (Specification 3.1).

http://www.javalinux.it/blogs/index.php?title=ws_eventing_and_subscription_expiration_&more=1&c=1&tb=1&pb=1