Yes it was locking issue this what I have in /etc/rc.conf: server: nfs_server_enable="YES" rpcbind_enable="YES" mountd_flags="-r" rpc_lockd_enable="YES" rpc_statd_enable="YES" clients: rpcbind_enable="YES" rpc_statd_enable="YES" rpc_lockd_enable="YES" nfs_client_enable="YES"