All the DTDs seem to have been taken down. I spent all morning trying to figure out why our JBoss deployment wouldn't start up!
Commenting out the DTD allows the deployment to start, but it's not ideal. Having said that, if the DTD URL has to resolve for a deployment to start, I don't think we can afford to use them anyway. This has just highlighted a point of failure I guess.
All of the DTDs and schemas should be back online at this point.
Shouldn't JBoss use the DTD from jar files instead? what option should I look into for changing that?