[nsd-users] Old-main quit during quit sync

[Otto Retter]

Hi all,

I'm running NSD 4.9.1 on OpenBSD 7.6. I recently upgraded from OpenBSD 
7.5, which I believe had NSD 4.8.0 in base, and did not see this 
behavior prior.

When I try to reload a zone using nsd-control, I am seeing an error 
message in my logfile: "error: reload: old-main quit during quit sync"

This error does not appear to happen every time I run reload, but it 
does get recorded to the logfile "more often than not" after a reload. 
When it does happen, it appears that the zone still successfully 
reloads. The error can show up when I reload any of my zones, and it 
does not appear to matter if I modified the zone. I cranked up verbosity 
to "3" but did not get much more detail. Below example is for my testing 
zone:

'''
$ nsd-control reload testing.internal
ok
$ echo $?
0
'''

and the relevant entries in nsd.log:
'''
[2025-01-04 14:55:30.652] nsd[69351]: info: new control connection from 
127.0.0.1
[2025-01-04 14:55:30.711] nsd[69351]: info: remote control connection 
authenticated
[2025-01-04 14:55:30.711] nsd[69351]: info: control cmd:  reload 
testing.internal
[2025-01-04 14:55:30.712] nsd[69351]: info: remote control operation 
completed
[2025-01-04 14:55:30.713] nsd[40839]: info: zonefile 
testing.internal.forward is not modified
[2025-01-04 14:55:30.723] nsd[40839]: error: reload: old-main quit 
during quit sync
'''

relevant snippets from nsd.conf:
'''
server:
         server-count: 1
         verbosity: 3
         zonesdir: "/var/nsd/etc/zones/"
         logfile: "/var/log/nsd.log"
         zonefiles-write: 60
zone:
         name: "testing.internal"
         zonefile: "testing.internal.forward"
'''

Anyone else seeing similar behavior or can tell me if I'm doing 
something wrong? Happy to compile latest or follow other suggested 
troubleshooting steps.

Thanks,
Otto