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[Bug 1435638] Re: ofagent: occasional test_server_connectivity_rebuild failure

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Armando Migliaccio <1435638@xxxxxxxxxxxxxxxxxx>
Date: Thu, 01 Oct 2015 00:27:19 -0000
Reply-to: Bug 1435638 <1435638@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** No longer affects: neutron

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https://bugs.launchpad.net/bugs/1435638

Title:
  ofagent: occasional test_server_connectivity_rebuild failure

Status in networking-ofagent:
  Fix Committed

Bug description:
  tempest test_server_connectivity_rebuild occasionally fail with
  ofagent.

  it turned out to be a problem in port monitoring.
  when a port is removed and then recreated with the same name in an agent's polling interval,
  it can miss the update and failed to update the corresponding flows.

  note1: flow updates are necessary because the switch is free to choose a different ofport number for the recreated port.
  note2: it isn't a problem for OVS-agent because it uses NORMAL action and doesn't have flows for a specific ofport.

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