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[Ihar Hrachyshka <1507602@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

https://review.openstack.org/#/c/215136/ was merged in the gate and
broke Ironic. It seems we have a weird issue in neutron db code that
makes fetch on router_id raise NotFound when updating a floating IP.

The patch was reverted in master, but we should understand what went
wrong, and maybe introduce additional testing that would not allow the
issue to sneak in.

We also should look into another patch that made similar change for
Create on FIP: https://review.openstack.org/#/c/231031/ It may also
break something.

** Affects: neutron
     Importance: High
     Assignee: Oleg Bondarev (obondarev)
         Status: Confirmed


** Tags: db l3-dvr-backlog

** Changed in: neutron
   Importance: Undecided => High

** Changed in: neutron
       Status: New => Confirmed

** Tags added: db l3-dvr-backlog

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https://bugs.launchpad.net/bugs/1507602

Title:
  _get_router() sometimes raises RouterNotFound when called from under
  create_floatingip

Status in neutron:
  Confirmed

Bug description:
  https://review.openstack.org/#/c/215136/ was merged in the gate and
  broke Ironic. It seems we have a weird issue in neutron db code that
  makes fetch on router_id raise NotFound when updating a floating IP.

  The patch was reverted in master, but we should understand what went
  wrong, and maybe introduce additional testing that would not allow the
  issue to sneak in.

  We also should look into another patch that made similar change for
  Create on FIP: https://review.openstack.org/#/c/231031/ It may also
  break something.

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