This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Well, indeed you don't need to restart the server, but redeploy the webapp. In case you're application have read the properties bundle, you'll need to do it, in case it haven't read the bundle, I think it isn't necessary. But where do you have the bundle?, it isn't within a WAR file? if it is in the WAR, you'll always need to redeploy the webapp.