Ubuntu mount NFS strange problem

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SullivanH
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Joined: Mon Oct 26, 2015 10:59 am

Ubuntu mount NFS strange problem

Post by SullivanH »

My working environment has 2 QNAP NAS systems, and about 10 Workstation runing Ubuntu.
The workstations use NFS mount to access the data QNAP public space. For a few years working fine without problems.
But since last week, I have two workstations cannot mount NFS to the QNAPs after the workstation reboot.
It is just no responding and hold there without any error messages.

Code: Select all

$ sudo mount -v -t nfs 172.20.76.95:/Public /mnt/nas2
mount.nfs: timeout set for Tue May 24 11:46:44 2022
mount.nfs: trying text-based options 'vers=4.2,addr=172.20.76.95,clientaddr=172.20.75.178'
This is strange because I remember I did nothing to change both QNAP and both workstations. Everything are functioning normal. And the other computers are still able to use the QNAP files normally.

Here is the rpcinfo of one workstation:

Code: Select all

$ rpcinfo -p
   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
    100005    1   udp  59585  mountd
    100005    1   tcp  43173  mountd
    100005    2   udp  55624  mountd
    100005    2   tcp  34469  mountd
    100005    3   udp  34753  mountd
    100005    3   tcp  46799  mountd
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100227    3   tcp   2049
    100003    3   udp   2049  nfs
    100227    3   udp   2049
    100021    1   udp  35593  nlockmgr
    100021    3   udp  35593  nlockmgr
    100021    4   udp  35593  nlockmgr
    100021    1   tcp  40159  nlockmgr
    100021    3   tcp  40159  nlockmgr
    100021    4   tcp  40159  nlockmgr
$ sudo systemctl status rpcbind
● rpcbind.service - RPC bind portmap service
     Loaded: loaded (/lib/systemd/system/rpcbind.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2022-05-19 22:37:42 +08; 4 days ago
TriggeredBy: ● rpcbind.socket
       Docs: man:rpcbind(8)
   Main PID: 1500 (rpcbind)
      Tasks: 1 (limit: 309030)
     Memory: 2.0M
     CGroup: /system.slice/rpcbind.service
             └─1500 /sbin/rpcbind -f -w

May 19 22:37:42 Maybach systemd[1]: Starting RPC bind portmap service...
May 19 22:37:42 Maybach systemd[1]: Started RPC bind portmap service.
I need to find out more information to get help. Can someone help me how to troubleshooting in this situation.
Thanks much in advance.
Huang
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SullivanH
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Joined: Mon Oct 26, 2015 10:59 am

Re: Ubuntu mount NFS strange problem

Post by SullivanH »

OK, find a workaround. Its the same issue reported in viewtopic.php?f=35&t=166523
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