During development a SPRING based scheduler in a tomcat container, I always get this logoutput at undeploy webapp or shutdown server:
Apr 28, 2010 4:21:33 PM
You need to add a shutdown hook - see Registering a shutdown hook in Spring 2.5.
In your case, you probably should add a context listener to your webapp that does this (web.xml entry for the listener + implementing class).
Use close, it's easiest.
((YourClass)yourObject).close();