Comment 22 for bug 1376483

Having the same issue, but on VM'S.
I have MaaS installed on VM, and I'm trying to pxe boot other vms with it.
But it is not working.
On rackd.log :
2018-06-14 08:16:31 -: [critical] Unhandled Error
 Traceback (most recent call last):
   File "/usr/lib/python3/dist-packages/twisted/application/app.py", line 364, in startReactor
     self.config, oldstdout, oldstderr, self.profiler, reactor)
   File "/usr/lib/python3/dist-packages/twisted/application/app.py", line 285, in runReactorWithLogging
     reactor.run()
   File "/usr/lib/python3/dist-packages/twisted/internet/base.py", line 1194, in run
     self.mainLoop()
   File "/usr/lib/python3/dist-packages/twisted/internet/base.py", line 1203, in mainLoop
     self.runUntilCurrent()
 --- <exception caught here> ---
   File "/usr/lib/python3/dist-packages/twisted/internet/base.py", line 825, in runUntilCurrent
     call.func(*call.args, **call.kw)
   File "/usr/lib/python3/dist-packages/tftp/util.py", line 81, in _call_and_schedule
     self.callable(*self.callable_args, **self.callable_kwargs)
   File "/usr/lib/python3/dist-packages/twisted/internet/udp.py", line 268, in write
     return self.socket.send(datagram)
 builtins.AttributeError: 'Port' object has no attribute 'socket'

Both MaaS and python-twisted is up to date.