RHEL 6 NFS server refuses mount request after nfs-utils upgrade: "getfh failed: Operation not permitted"

Issue

• After the upgrade of RHEL 6.1 servers (nfs-utils package), which are sharing NFS shares, below errors are seen. NFS clients were not able to mount the shares. Downgrading the nfs-utils package from version nfs-utils-1.2.3-15.el6_2.1.x86_64 to nfs-utils-1.2.3-15.el6.x86_64 resolves the problem.

Apr 26 09:29:10 hostname CNFS: Enabling XXX.XXX.XXX.XXX
Apr 26 09:29:16 hostname CNFS: Starting NFS services
Apr 26 09:38:28 hostname rpc.mountd[13980]: authenticated mount request from XXX.XXX.XXX.XXY:832 for /vol/volume (/vol/volume)
Apr 26 09:38:28 hostname rpc.mountd[13980]: internal: no supported addresses in nfs_client
Apr 26 09:38:28 hostname rpc.mountd[13980]: getfh failed: Operation not permitted