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[Chris Behrens <1347778@xxxxxxxxxxxxxxxxxx>]

** Also affects: python-neutronclient
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1347778

Title:
  raising Maximum number of ports exceeded is wrong

Status in OpenStack Compute (Nova):
  Triaged
Status in Python client library for Neutron:
  Confirmed

Bug description:
  When neutron API in nova calls create_port(), it looks for exceptions.
  Any 409 is turned into 'Maximum number of ports exceeded'. This is a
  horrible assumption. Neutron can return 409s for more than just this
  reason.

  Another case where neutron returns a 409 is this:

  2014-07-22 18:10:27.583 26577 INFO neutron.api.v2.resource [req-b7267ae5-bafa-4c34-8e25-9c0fca96ad2d None] create failed (client error):
                       Unable to complete operation for network 00000000-0000-0000-0000-000000000000. The mac address XX:XX:XX:XX:XX:XX is in use.

  This can occur when the request to create a port includes the mac
  address to use (as happens w/ baremetal/ironic in nova) and neutron
  for some reason still has things assigned with that mac.

  This is the offending code:

   174         except neutron_client_exc.NeutronClientException as e:
   175             # NOTE(mriedem): OverQuota in neutron is a 409
   176             if e.status_code == 409:
   177                 LOG.warning(_('Neutron error: quota exceeded'))
   178                 raise exception.PortLimitExceeded()

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