org.jivesoftware.whack.ExternalComponentManager uses org.xmpp.component.Log. org.xmpp.component.Log was removed from Tinder, it looks like prior to 1.0. org.xmpp.component was removed from Whack and replaced by Tinder. So, trying to use Whack 1.0 and Tinder (any version, apparently), throws NoClassDefFoundError when trying to use ExternalComponentManager for org.xmpp.component.Log, because it does not exist in any of those jars.
Am I missing something? I can't believe this could have gone unnoticed for almost a year and a half.
Nevermind, found another discussion on this topic and realized it is in the current version in subversion, but there has been no release in quite a while, so the current release download does not contain the class.