Under some circumstances, the following message goes to
kernel: svc: unknown version (3)
Yet, nothing seems to be wrong.
This is also true under 6.0.
This message repeats every 10 minutes.
It is likely NFS related.
I believe that this message is from someone trying to talk to the
NFS server with NFS v3 protocol. If the server used to run Redhat
6.0, a system may have had 6.0's mountd accept a NFS v3 mount
request (although the kernel couldn't server NFS v3); in 6.1 the
/etc/rc.d/init.d/nfs script is careful to start mountd with the
right option to tell it not to do this.
Assigned to dledford