So it looks like an incompatibility with NFS3 vs NFS4. My CentOS 5.x machines have been running this config for years without issue. As soon as I moved to CentOS 6.x, they default to NFS4. I can force NFS3, but this is not the solution I was hoping for.
On most systems I can do cd /nfs/compton1 for compton:/compton/disk1
This is accomplished via an auto.nfs.
In the end, forcing nfs to mount version 3 in the auto.nfs file fixed
Code:
# Issue the output string that autofs needs to make the mount
echo -e "-fstype=nfs,nfsvers=3,rsize=8192,wsize=8192,intr $MACHINE.mydomain.com:/$MACHINE$DIRECTORY"