In absence of a traffic dump, try applying e8.patch to the cluster:
cd /usr/share/pyshared/tftp sudo patch -2 < .../e8.patch sudo restart maas-clusterd
This should give us more information about the error being sent from the remote system.
In absence of a traffic dump, try applying e8.patch to the cluster:
cd /usr/share/ pyshared/ tftp
sudo patch -2 < .../e8.patch
sudo restart maas-clusterd
This should give us more information about the error being sent from the remote system.