JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
I'm not too famillar with those JkOptions but looking at my old mod_jk configs I have no JkOptions defined, try removing them and see if anything changes? My old configs were ajp13, so perhaps they might be needed with ajp12, not sure.
Yea, these options were in the mod_jk template that I started with. It was left here by a previous administrator. I commented this out and restarted apache, yet I get the same error.
I guess what I'm not clear on is how you replace mod_jserv's configuration:
ApJServMount /servlets ajpv12://host.domain.com:8008/root
with the equivalent version using JkMount.