title: Deploy WAR or "fat" JAR?
body: <p>I'm noticing a lot of projects (DropWizard, Grails, etc.) starting to embrace the notion of a "fat" JAR (using an embedded web server like Jetty or Tomcat) vs. the traditional WAR deploy. Both methods involve a single JVM process (i.e. no matter how many WARs are deployed to Tomcat, it's all the same JVM process).</p>
  
  <p>Under what circumstances is either deployment method preferable over the other?</p>