NFS Error "nfsd: can't register svc name"

Joined
Nov 17, 2022
Messages
2
Hello TrueNAS Community
My first post... (it's usually a bit more than the "hello world")

My work hosts a OpenStack Hypervisor on a Dell R740XD server at a remote site. OpenStack hosts a TrueNAS VM along with several other virtual machines.
HyperV. resources for TrueNAS VM
8 VCPU
36Gb Memory
160Gb Boot vol
>30Tb Store vol

Yesterday the Dell R740XD vSAS SSD RAID volume threw an error. Server was shutdown, controller card re-seated. Server is back online. No problems with the Physical server OS (Ubuntu)

Since the problem occured, the TrueNAS NFS service wil not start without an error. All other virtual servers & external machines (on the same /24 subnet) can ping the TrueNAS server but CANNOT mount the NFS share.

Code:
tail -f /var/log/messages

shows the below everytime I attempt to start the NFS service
Code:
nfsd: can't register svc name


All external machines executing
Code:
showmount -e <server_ip_addr>
or the server name, which is resolvable return the below when the NFS service is running
Code:
rpc mount export: RPC: Unable to receive; errno = No route to host


I've spent the majority of today researching both TrueNAS and FreeBSD community forums trying to find an answer to this. Several forum threads mentioned these "no longer valid" URLs


Forums (yes, I've read, and Google translated ALL the forums I could find here mentioning this problem)
https://www.truenas.com/community/threads/nfs-mount-creation-issue.45855/ is marked as SOLVED by stating the TrueNAS server was rebuilt. The root cause never clearly identified and fixed and...
https://www.truenas.com/community/threads/nfsd-cant-register-svc-name.63175/ also marked as solved by migrating from NFS to CIFS. Again, no root cause identified and issue fixed.

I have also done the following to the TrueNAS instance
1) removed all the pre-existing NFS and CIFS shares
2) cleaned up all invalid users and groups
3) reset the VNIC, and making sure DNS works perfectly (which is did before, but worth redoing)
4) rebuilt the one and only NFS share on the box (the reason why the vm exists)
5) Upgraded from TrueNAS-12.1 RELEASE to TrueNAS-13.0-U3.1

The TrueNAS vserver doesn't run any Jails or Appliances, it's almost pure vanilla with a touch of "NFS share" chocolate applied.

The only thing I have not done (yet) is re-create a brand new TrueNAS Virtual Server.

Can someone please point me in the right direction? Even updated likes to the redmine.ixsystems.com invalid links above would be hugely beneficial!

Some light entertainment, with a hint of relevance to my issue --> https://www.youtube.com/watch?v=zGwszApFEcY
 
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