解決nfs掛載經常卡死的問題

有同事的電腦掛載nfs老是卡死，但其它人的電腦沒有出現這個問題，經過網絡查詢，最絡發現只要掛載時添加nfsvers=4.0就可以解決問題；

(base) [root@localhost ~]# cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Wed Oct 23 06:14:11 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root /                       xfs     defaults        0 0
UUID=1b8294b3-07b7-48f8-b954-aa8022c404e8 /boot                   xfs     defaults        0 0
/dev/mapper/centos-home /home                   xfs     defaults        0 0
/dev/mapper/centos-swap swap                    swap    defaults        0 0
/dev/vg_harddisk2/lv_harddisk2 /data            xfs     defaults        0 0
nfssever:/public /mnt   nfs  nfsvers=4.0  0 0