NFSv4 not able to set any sockets for nfsd without running rpcbind
This was a bug in NFS server kernel module. It was patched in December 2013.
Starting with kernel 3.14,
rpcbind is no longer required to run in-kernel NFS server.
(assuming that server is configured to use only NFSv4 and higher)
You can find more information about that change in this thread:
Therefore, your configuration:
MOUNTD_NFS_V2="no" MOUNTD_NFS_V3="no" RPCNFSDARGS="-N 2 -N 3"
should now work without
When you use only NFSv4, none of these services are required:
/etc/rc.d/init.d/nfslock /etc/rc.d/init.d/rpcgssd /etc/rc.d/init.d/rpcidmapd /etc/rc.d/init.d/rpcsvcgssd