MAAS celery DHCP traceback

[Adam Collard]

⟫ dpkg-query -W maas
maas 1.4+bzr1820+dfsg-0ubuntu1

(with amttool template copied in place)

[2014-01-29 17:51:16,335: ERROR/MainProcess] Task provisioningserver.tasks.periodic_probe_dhcp[caefe698-3e98-4d79-9010-3b67d3f04e00] raised unexpected: IOError(99, 'Cannot assign requested address')
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/celery/app/trace.py", line 218, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/celery/app/trace.py", line 398, in __protected_call__
    return self.run(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/provisioningserver/tasks.py", line 349, in periodic_probe_dhcp
    detect.periodic_probe_task()
  File "/usr/lib/python2.7/dist-packages/provisioningserver/dhcp/detect.py", line 338, in periodic_probe_task
    servers = probe_interface(interface, ip)
  File "/usr/lib/python2.7/dist-packages/provisioningserver/dhcp/detect.py", line 279, in probe_interface
    servers = probe_dhcp(interface)
  File "/usr/lib/python2.7/dist-packages/provisioningserver/dhcp/detect.py", line 213, in probe_dhcp
    transaction_id = request_dhcp(interface)
  File "/usr/lib/python2.7/dist-packages/provisioningserver/dhcp/detect.py", line 170, in request_dhcp
    bind_address = get_interface_IP(sock, interface)
  File "/usr/lib/python2.7/dist-packages/provisioningserver/dhcp/detect.py", line 148, in get_interface_IP
    info = fcntl.ioctl(sock, SIOCGIFADDR, ifreq)
IOError: [Errno 99] Cannot assign requested address

Got the above traceback using MAAS with 3 KVMs and 9 physical nodes. Doesn't appear to have any affect on actual operations (nodes come up/go down, can be deployed to).

[Julian Edwards (julian-edwards)]

Looks similar to bug 1274190. Won't dupe for now because the traceback is different but I suspect the same underlying cause.

[Julian Edwards (julian-edwards)]

Ok this happens when the interface has no IP address. We should probably not do the detection for these interfaces as they are clearly not in use.