Comment 11 for bug 1979885

> blkmapd: open pipe file /var/lib/nfs/rpc_pipefs/nfs/blocklayout failed: No such file or
> directory

Do you have rpc_pipefs mounted elsewhere in that moment? Perhaps /run?

Check "mount | grep rpc_pipefs"

I'm tracking https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/1971935 which is about a discrepancy in the mountpoint of the rpc_pipefs filesystem, but couldn't reproduce that one.

As for nfs.conf, it's best to check "nfsconf --dump" instead of just one config file, as all of /etc/nfs.conf and /etc/nfs.conf.d/*.conf are merged together. Just to be sure you don't have some /etc/nfs.conf.d/*.conf changing some of the parameters.