i'm everthing but an expert in this, but i got loadbalancing with ajp working
with those versions you mention (2.2.2 and 5.5.17). Maybe my config below is
helpful for you.
The documentation on the net about configuration of the new built-in ajp
support through the proxy module was rather thin.
I've got tomcat 5.5.17 and apache 2.2.2 installed and I'm trying to set
up an AJP1.3 connector to proxy content from apache to tomcat. However,
no matter what I've tried so far, tomcat always responds with a
"requested resource not available" error.
Following are the settings in server.xml: