new error messages after upgrade 14.0-p5 to 14.1-p1 amd64

After upgrading, I noticed messages like these appearing during
rebooting, immediately after kernel: NFS access cache time=60

kernel: rpc.umntall: 10.1.1.102: MOUNTPROG: RPC: Port mapper failure - RPC: Timed out

sometimes it appears twice, once it appeared five times. The system
eventually completes booting and there are no more messages like this.

/etc/fstab has the following

10.1.1.102:/usr/src /usr/src nfs rw,readahead=16,late 0 0

Logging in, the nfs share is mounted normally.
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