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Reviewed:  https://review.openstack.org/352844
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=26bdffb3d73f12833f6fdbdfab6f584f84507693
Submitter: Jenkins
Branch:    master

commit 26bdffb3d73f12833f6fdbdfab6f584f84507693
Author: Oleg Bondarev <obondarev@xxxxxxxxxxxx>
Date:   Tue Aug 9 13:45:26 2016 +0300

    Handle deleted ports when creating a list of fdb entries
    
    The issue might happen when VMs are intensively created/deleted.
    With the patch deleted ports will be just skipped.
    
    Closes-Bug: #1610303
    Change-Id: I32b0de9c452cf973d687c72e8381584012c9f3b4


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

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https://bugs.launchpad.net/bugs/1610303

Title:
  l2pop mech fails to update_port_postcommit on a loaded cluster

Status in neutron:
  Fix Released

Bug description:
  On a cluster where VMs boots and deletes happen pretty intensively
  following traces can pop up in neutron server log:

  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers [req-1b5e9a29-7f7e-48f8-84ee-19ce217cb556 - - - - -] Mechanism driver 'l2population' failed in update_port_postcommit
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers Traceback (most recent call last):
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers   File "/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/managers.py", line 401, in _call_on_drivers
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers     getattr(driver.obj, method_name)(context)
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers   File "/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/l2pop/mech_driver.py", line 120, in update_port_postcommit
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers     self._update_port_up(context)
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers   File "/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/l2pop/mech_driver.py", line 227, in _update_port_up
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers     network_id)
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers   File "/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/l2pop/mech_driver.py", line 176, in _create_agent_fdb
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers     fdbs.extend(self._get_port_fdb_entries(binding.port))
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers   File "/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/l2pop/mech_driver.py", line 45, in _get_port_fdb_entries
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers     for ip in port['fixed_ips']]
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers TypeError: 'NoneType' object has no attribute '__getitem__'
  2016-08-05 14:08:29.575 9560 ERROR neutron.plugins.ml2.managers
  2016-08-05 14:08:29.578 9560 ERROR neutron.plugins.ml2.rpc [req-1b5e9a29-7f7e-48f8-84ee-19ce217cb556 - - - - -] Failed to update device 4c499a14-7211-4714-afa2-95b280d595a2 up

  This leads to device to being set to Active state and hence Nova
  timeouts waiting for the interface to be ready.

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