mount.nfs: mount system call failed

I am trying to mount hdfs on my local machine running Ubuntu using the following command :--- sudo mount -t nfs -o vers=3,proto=tcp,nolock 192.168.170.52:/ /mnt/hdfs_mount/ But I am getting this error:- mount.nfs: mount system call failed Output for rpcinfo -p 192.168.170.52 is program vers proto port service 100000 4 tcp 111 portmapper 100000 3 tcp 111 portmapper 100000 2 tcp 111 portmapper 100000 4 udp 111 portmapper 100000 3 udp 111 portmapper 100000 2 udp 111 portmapper 100024 1 udp 48435 status 100024 1 tcp 54261 status 100005 1 udp 4242 mountd 100005 2 udp 4242 mountd 100005 3 udp 4242 mountd 100005 1 tcp 4242 mountd 100005 2 tcp 4242 mountd 100005 3 tcp 4242 mountd 100003 3 tcp 2049 nfs Output for showmount -e 192.168.170.52 is Export list for 192.168.170.52: / * I also tried by adding hadoop.proxyuser.root.groups * hadoop.proxyuser.root.hosts * in my core-site.xml file located in /etc/hadoop/conf.pseudo. But it did not work. Please help me with this.