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[OpenStack Infra <1655567@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/469669
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=802cf1194218dc125b7211d9c48df8cfebd4f932
Submitter: Jenkins
Branch:    master

commit 802cf1194218dc125b7211d9c48df8cfebd4f932
Author: Miguel Lavalle <malavall@xxxxxxxxxx>
Date:   Wed May 31 16:38:57 2017 -0500

    Fix race between create subnet and port requests
    
    When creating an IPv6 auto-address subnet for a network, ports can be
    created or updated concurrently in the same network, before the subnet
    creation concludes. In such a situation, an IpAddressAlreadyAllocated
    exception may be raised, because the subnet create request attempts to
    allocate auto addresses to the concurrently created or updated ports,
    which have been already allocated by the port requests.
    
    This patchset adds code to the IPAM to skip the attempt to assign the
    auto address to ports if they already have received them.
    
    Change-Id: If1eb4046865f43b15ba97c52e2d0b9343dc72c19
    Closes-Bug: #1655567


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1655567

Title:
  DHCPv6 failures with "address already allocated in subnet" error

Status in neutron:
  Fix Released

Bug description:
  Test failures with the DHCPv6 error from multiple test methods.

  Use query:
  http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22already%20allocated%20in%20subnet%5C%22

  An example:

   ==============================
  2017-01-11 05:00:04.479808 | Failed 1 tests - output below:
  2017-01-11 05:00:04.479858 | ==============================
  2017-01-11 05:00:04.479883 | 
  2017-01-11 05:00:04.479962 | tempest.api.network.test_dhcp_ipv6.NetworksTestDHCPv6.test_dhcpv6_stateless_eui64[id-e5517e62-6f16-430d-a672-f80875493d4c]
  2017-01-11 05:00:04.480056 | --------------------------------------------------------------------------------------------------------------------------
  2017-01-11 05:00:04.480082 | 
  2017-01-11 05:00:04.480113 | Captured traceback:
  2017-01-11 05:00:04.480154 | ~~~~~~~~~~~~~~~~~~~
  2017-01-11 05:00:04.480204 |     Traceback (most recent call last):
  2017-01-11 05:00:04.480283 |       File "tempest/api/network/test_dhcp_ipv6.py", line 109, in test_dhcpv6_stateless_eui64
  2017-01-11 05:00:04.480415 |         real_ip, eui_ip = self._get_ips_from_subnet(**kwargs)
  2017-01-11 05:00:04.480486 |       File "tempest/api/network/test_dhcp_ipv6.py", line 90, in _get_ips_from_subnet
  2017-01-11 05:00:04.480551 |         subnet = self.create_subnet(self.network, **kwargs)
  2017-01-11 05:00:04.480607 |       File "tempest/api/network/base.py", line 179, in create_subnet
  2017-01-11 05:00:04.481118 |         **kwargs)
  2017-01-11 05:00:04.481198 |       File "tempest/lib/services/network/subnets_client.py", line 27, in create_subnet
  2017-01-11 05:00:04.481260 |         return self.create_resource(uri, post_data)
  2017-01-11 05:00:04.481756 |       File "tempest/lib/services/network/base.py", line 60, in create_resource
  2017-01-11 05:00:04.481830 |         resp, body = self.post(req_uri, req_post_data)
  2017-01-11 05:00:04.481887 |       File "tempest/lib/common/rest_client.py", line 276, in post
  2017-01-11 05:00:04.481946 |         return self.request('POST', url, extra_headers, headers, body, chunked)
  2017-01-11 05:00:04.482000 |       File "tempest/lib/common/rest_client.py", line 664, in request
  2017-01-11 05:00:04.482042 |         self._error_checker(resp, resp_body)
  2017-01-11 05:00:04.482098 |       File "tempest/lib/common/rest_client.py", line 776, in _error_checker
  2017-01-11 05:00:04.482145 |         raise exceptions.Conflict(resp_body, resp=resp)
  2017-01-11 05:00:04.482204 |     tempest.lib.exceptions.Conflict: An object with that identifier already exists
  2017-01-11 05:00:04.482325 |     Details: {u'detail': u'', u'message': u'IP address 2003::f816:3eff:fe18:34ee already allocated in subnet 181627ba-b8ff-49c2-b97d-21763a0b572c', u'type': u'IpAddressAlreadyAllocated'}

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