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[Balazs Gibizer <balazs.gibizer@xxxxxxxxxxxx>]

Public bug reported:

Consider the following setup in placement:

       CN1 (VCPU)          CN2 (VCPU)
      / agg3   \ agg1     / agg1   \ agg2
  SS3 (IPV4)   SS1 (DISK_GB)      SS2 (IPV4)

Then VCPU, DISK_GB  nd IPV4 resources are requested. However besides
the expected candidates we get invalid candidates mixing CN1 with SS2
and CN2 with SS3 which are clearly invalid.

Here is a functional test reproducing the issue:
https://review.openstack.org/#/c/519617

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: placement

** Tags added: placement

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https://bugs.launchpad.net/bugs/1732707

Title:
  AllocationCandidates.get_by_filters returns candidates containing non
  connected RPs

Status in OpenStack Compute (nova):
  New

Bug description:
  Consider the following setup in placement:

         CN1 (VCPU)          CN2 (VCPU)
        / agg3   \ agg1     / agg1   \ agg2
    SS3 (IPV4)   SS1 (DISK_GB)      SS2 (IPV4)

  Then VCPU, DISK_GB  nd IPV4 resources are requested. However besides
  the expected candidates we get invalid candidates mixing CN1 with SS2
  and CN2 with SS3 which are clearly invalid.

  Here is a functional test reproducing the issue:
  https://review.openstack.org/#/c/519617

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