unable to open upcall type 2

[techtonik]

I've installed v1.0.0/ms-nfs41-client-setup-x86.exe uploaded in issue #1. But server failed to start with unable to open upcall type 2 error.

C:\Program Files\NFSv4.1 Client>nfsd_debug.exe
parse_cmdlineargs: debug_level 1 ldap is 1
1988: getaddrinfo response flags: 0x0
1988: Family: AF_INET6 IPv6 address ::1
1988: Canonical name: (null)
1988: getdomainname: hostname Box 8
1988: getaddrinfo response flags: 0x0
1988: Family: AF_INET IPv4 address 192.168.50.1
1988: Canonical name: (null)
1988: getdomainname: hostname Box.domain 16
1988: getdomainname: domainname domain 7
1988: NFS41 Daemon starting: version 15494144
1988: Unable to open upcall pipe 2

I went to the setup of my network adapter and removed domain from default suffix (it was added by mistake) and the error changed to:

C:\Program Files\NFSv4.1 Client>nfsd_debug.exe
parse_cmdlineargs: debug_level 1 ldap is 1
1b68: getaddrinfo response flags: 0x0
1b68: Family: AF_INET6 IPv6 address ::1
1b68: Canonical name: (null)
1b68: getdomainname: hostname Box 8
1b68: getaddrinfo response flags: 0x0
1b68: Family: AF_INET IPv4 address 192.168.50.1
1b68: Canonical name: (null)
1b68: getdomainname: hostname Box 8
1b68: getaddrinfo response flags: 0x0
1b68: Family: AF_INET IPv4 address 192.168.30.1
1b68: Canonical name: (null)
1b68: getdomainname: hostname Box 8
1b68: getaddrinfo response flags: 0x0
1b68: Family: AF_INET IPv4 address 192.168.33.8
1b68: Canonical name: (null)
1b68: getdomainname: hostname Box 8
1b68: getdomainname: unable to get a domain name. Set this machine's domain name
:
System > ComputerName > Change > More > mydomain

I am just curious why domain name is so important?

But this unlikely to solve real issue. I also noticed in system log:

The following boot-start or system-start driver(s) failed to load: 
nfs41_driver
tvtumon

Both logs nfsddbg.log and nfsderr.log are empty.

[techtonik]

I just removed DFS Replication Service, maybe it will help.

[seanlinmt]

Are you in test mode?

[techtonik]

Yes. I likely was in test mode to get access to 8Gb of memory, but that mode doesn't work anymore.

[JamoDevNich]

In-case anyone else runs into this issue, here's how I troubleshooted & partially solved this in my scenario...

1. Check whether the driver is running using the command sc query nfs41_driver.

   • If nfs41_driver is running, stop here - this probably won't fix your issue
   • For good measure, make sure DFS is not running using sc query Dfsc. If it is running, using an administrator command prompt run sc stop Dfsc, sc config Dfsc start=disabled and reboot your machine.

2. Attempt to start nfs41_driver using an administrator command prompt sc start nfs41_driver.

   • I got an error complaining about the certificate, so I generated a new self-signed one using these resources:
     • https://stackoverflow.com/a/48817154
     • https://github.com/BAPostma/SigntoolUI
     • Windows 10 SDK (provides signtool.exe)

3. Un-install the old NFS4 driver using the uninstall.bat file, and install your newly signed NFS4 driver using install.bat

4. Reboot your system with driver signature enforcement disabled.

5. Check whether nfs41_driver is running using sc query nfs41_driver.

So, I mentioned how this was partially solved... I did not notice the unable to open upcall pipe # error after this, but I have not been able to mount a network drive. The mount command completes with no obvious error, but the mapped drive is absent in Explorer and can't be selected in the Command Prompt.