Lets go see what their website says. How bad can it be?
> Red Hat® JBoss® Middleware is a family of a lightweight, cloud-friendly, enterprise-grade products that help enterprises innovate faster, in a smarter way. The ideal middleware portfolio for open hybrid cloud environments, our products and services help you accelerate application development, deployment, and performance, integrate data and applications efficiently, and automate business processes across physical, virtual, mobile, and cloud environments.
It's Jboss.
If you want to be generous it's Inferno.