Failed to Release / Delete / start nodes

[Andres Rodriguez]

Trying to release and delete nodes and keep getting internal server error with latest trunk (3113)

==> /var/log/maas/maas.log <==
Sep 27 11:50:35 unleashed maas.node: [INFO] clever-cattle.local: Releasing node
Sep 27 11:50:35 unleashed maas.power: [INFO] Changing power state (off) of node: clever-cattle.local (node-7207c4aa-450f-11e4-9c6e-7c7a9140484f)
Sep 27 11:50:35 unleashed maas.node: [INFO] clever-cattle.local: Deleting DHCP host maps
Sep 27 11:50:35 unleashed maas.dhcp: [ERROR] Could not remove host map for 192.168.122.151: Command `omshell` returned non-zero exit status 0:#012> > > > not connected.#012> no open object.#012> not connected.#012> not connected.#012>

==> /var/log/maas/maas-django.log <==
ERROR 2014-09-27 11:50:35,917 django.request Internal Server Error: /MAAS/nodes/
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 112, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/lib/python2.7/dist-packages/django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/django/views/generic/base.py", line 87, in dispatch
    return handler(request, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/maasserver/views/nodes.py", line 297, in post
    return super(NodeListView, self).post(request, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/django/views/generic/edit.py", line 171, in post
    return self.form_valid(form)
  File "/usr/lib/python2.7/dist-packages/maasserver/views/nodes.py", line 309, in form_valid
    stats = form.save()
  File "/usr/lib/python2.7/dist-packages/maasserver/forms.py", line 1873, in save
    return self.perform_action(action_name, system_ids)
  File "/usr/lib/python2.7/dist-packages/maasserver/forms.py", line 1821, in perform_action
    action_instance.execute(allow_redirect=False)
  File "/usr/lib/python2.7/dist-packages/maasserver/node_action.py", line 352, in execute
    self.node.release_or_erase()
  File "/usr/lib/python2.7/dist-packages/maasserver/models/node.py", line 1282, in release_or_erase
    self.release()
  File "/usr/lib/python2.7/dist-packages/maasserver/models/node.py", line 1248, in release
    self.delete_host_maps(deallocated_ips)
  File "/usr/lib/python2.7/dist-packages/maasserver/models/node.py", line 998, in delete_host_maps
    raise MultipleFailures(*remove_host_maps_failures)
MultipleFailures: [Failure instance: Traceback (failure with no frames): <class 'provisioningserver.rpc.exceptions.CannotRemoveHostMap'>: 192.168.122.151: > > > > not connected.
> no open object.
> not connected.
> not connected.

[Raphaël Badin (rvb)]

omshell is the tool we use to communicate with the DHCP server. It seems the communication with the DHCP server was failing… can you have a look at the DHCP server logs to see what the problem was?