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[Balazs Gibizer <balazs.gibizer@xxxxxxxx>]

Public bug reported:

Since https://review.opendev.org/#/c/687565 is merged to stable/rocky a
compute node without any allocations in placement will log an error at
every nova-compute restart.

Nov 15 15:02:41 ubuntu nova-compute[21876]: ERROR nova.compute.manager
[None req-0ab61fb0-a780-4b84-ad07-3d6b3216b280 None None] Could not
retrieve compute node resource provider 5895faa5-01fd-46ee-8afb-
6ddcf136f65e and therefore unable to error out any instances stuck in
BUILDING state.

The ERROR log is simply wrong. It happens because the placement report
client does not differentiate between error received from placement and
empty allocation dict received from placement. This only effects
stable/rocky and older stable branches as in stein
get_allocations_for_resource_provider() was enhanced to raise instead of
returning {} if placement returned an error [1].

[1]
https://github.com/openstack/nova/commit/f534495a427d1683bc536cf003ec02edbf6d8a45

** Affects: nova
     Importance: Undecided
         Status: Invalid

** Affects: nova/pike
     Importance: Undecided
         Status: New

** Affects: nova/queens
     Importance: Undecided
         Status: New

** Affects: nova/rocky
     Importance: Low
     Assignee: Balazs Gibizer (balazs-gibizer)
         Status: Triaged


** Tags: compute

** Also affects: nova/pike
   Importance: Undecided
       Status: New

** Also affects: nova/rocky
   Importance: Undecided
       Status: New

** Also affects: nova/queens
   Importance: Undecided
       Status: New

** Changed in: nova
       Status: New => Invalid

** Changed in: nova/rocky
     Assignee: (unassigned) => Balazs Gibizer (balazs-gibizer)

** Changed in: nova/rocky
       Status: New => Triaged

** Changed in: nova/rocky
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1852759

Title:
  false error log at compute restart during error out stuck instances

Status in OpenStack Compute (nova):
  Invalid
Status in OpenStack Compute (nova) pike series:
  New
Status in OpenStack Compute (nova) queens series:
  New
Status in OpenStack Compute (nova) rocky series:
  Triaged

Bug description:
  Since https://review.opendev.org/#/c/687565 is merged to stable/rocky
  a compute node without any allocations in placement will log an error
  at every nova-compute restart.

  Nov 15 15:02:41 ubuntu nova-compute[21876]: ERROR nova.compute.manager
  [None req-0ab61fb0-a780-4b84-ad07-3d6b3216b280 None None] Could not
  retrieve compute node resource provider 5895faa5-01fd-46ee-8afb-
  6ddcf136f65e and therefore unable to error out any instances stuck in
  BUILDING state.

  The ERROR log is simply wrong. It happens because the placement report
  client does not differentiate between error received from placement
  and empty allocation dict received from placement. This only effects
  stable/rocky and older stable branches as in stein
  get_allocations_for_resource_provider() was enhanced to raise instead
  of returning {} if placement returned an error [1].

  [1]
  https://github.com/openstack/nova/commit/f534495a427d1683bc536cf003ec02edbf6d8a45

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