I have the same problem. My 10.04 Apache server reverse proxied my Tomcat 6.0.24 OpenJDK server just fine. I just swapped out the 10.04 Apache server with a 12.04 Apache server and the proxy failed until I used the solution mentioned in comment #6.
I have the same problem. My 10.04 Apache server reverse proxied my Tomcat 6.0.24 OpenJDK server just fine. I just swapped out the 10.04 Apache server with a 12.04 Apache server and the proxy failed until I used the solution mentioned in comment #6.