Kind of looks like some resources are missing. I just downloaded the latest update. This dump is from when I attempted to create lumber. Happens every time. This is a game breaker because it crashes the server to where nothing will respond. You can run around, but you can't manipulate the terrain, craft, or anything.
Code
SEVERE: Unable to load localizated months: java.util.MissingResourceException: Can't find bundle for base name bundles/Bundle, locale en_US