It seems that new version of ring use jetty 7.
ring/ring-core "1.1.1"
ring/ring-jetty-adapter "1.1.1"
Jetty 7 has changed its namespace from org.mortbay to org.eclipse and it has also changed the Logger interface.
I have just made a quick correction to get it working with jetty 7 https://github.com/antoineB/ring-serve/.
It seems that new version of ring use jetty 7. ring/ring-core "1.1.1" ring/ring-jetty-adapter "1.1.1" Jetty 7 has changed its namespace from org.mortbay to org.eclipse and it has also changed the Logger interface. I have just made a quick correction to get it working with jetty 7 https://github.com/antoineB/ring-serve/.