An error occurred, but the cause is unknown

TrueNAS General
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1

Trying to stop a virtual machine on TrueNAS-13.0-U6.1

[2024/04/15 18:16:27] (ERROR) middlewared.job.run():367 - Job <bound method accepts.<locals>.wrap.<locals>.nf of <middlewared.plugins.vm.VMService object at 0x819daf040>> failed
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/middlewared/job.py", line 355, in run
    await self.future
  File "/usr/local/lib/python3.9/site-packages/middlewared/job.py", line 393, in __run_body
    rv = await self.middleware.run_in_thread(self.method, *([self] + args))
  File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1159, in run_in_thread
    return await self.run_in_executor(self.thread_pool_executor, method, *args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1156, in run_in_executor
    return await loop.run_in_executor(pool, functools.partial(method, *args, **kwargs))
  File "/usr/local/lib/python3.9/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/local/lib/python3.9/site-packages/middlewared/schema.py", line 985, in nf
    return f(*args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/middlewared/plugins/vm.py", line 1628, in stop
    vm.stop(vm_data['shutdown_timeout'])
  File "/usr/local/lib/python3.9/site-packages/middlewared/plugins/vm.py", line 262, in stop
    self.domain.shutdown()
  File "/usr/local/lib/python3.9/site-packages/libvirt.py", line 2916, in shutdown
    raise libvirtError('virDomainShutdown() failed')
libvirt.libvirtError: An error occurred, but the cause is unknown
2

This happens when trying to boot Free BSD from an ISO.

root@freenas[~]# virsh list
 Id     Name         State
------------------------------
 1738   4_Debian12   running
 6342   6_FBSD       running

root@freenas[~]# virsh shutdown 6_FBSD
error: Failed to shutdown domain '6_FBSD'
error: An error occurred, but the cause is unknown

root@freenas[~]# virsh destroy  6_FBSD
Domain '6_FBSD' destroyed

root@freenas[~]# virsh list
 Id     Name         State
------------------------------
 1738   4_Debian12   running
3

VMs work better in Scale in my experience.

Shutdown bugs, restart bugs, misc stalls and hangs. These are bhyve things and specific to Core.

And why I switched to scale.