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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

** Changed in: neutron
    Milestone: None => kilo-3

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https://bugs.launchpad.net/bugs/1417629

Title:
  Make remove_network_from_dhcp_agent more robust

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  In case network failover is turned on, remove_network_from_dhcp_agent method is a matter of concurrent execution by different neutron servers.
  It then may throw unexpected DB exception, breaking network failover looping call.

  Neet to make both remove_network_from_dhcp_agent and
  remove_networks_from_down_agents more robust by catching broader
  exception in the loop, and using safe DB delete method.

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