"NFS append race"

[Ryan Stone]

I have a 11.1-RELEASE client mounting an NFS directory from a
12-CURRENT server.  I'm doing a buildworld right now on it, with the
src dir mounted on a local drive on the client and the objdir on the
NFS mount.  I'm seeing the following printed to the console every few
minutes:


NFS append race @10000:4040
NFS append race @10000:4040
NFS append race @10000:564
NFS append race @10000:564


The "10000" is never changes, but the number after the : is always
different (except that the exact same message will repeat once within
a second of the first message)

What does this mean?  Is it something to be concerned about?