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[mingi hong <2020766@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hello openstacker I need you guys help.
I've tried live migrated hypervisor to another one.
I've faced unauthorized error message. After that, I tried one more  time and I got new error message. It was "Binding failed for port b9bff40a-6794-4c6d-86a3-ccce8911ee51 and host . Error: (409 {"NeutronError": {"type": "PortBindingAlreadyExists", "message": "Binding for port b9bff40a-6794-4c6d-86a3-ccce8911ee51 on host  already exists.", "detail": ""}})". However, I restarted all neutron, nova daemons. It was not fixed. I decided to created new network interfaces which are same MAC addresses and IP. The issue was fixed, but I encounter another issue after creating new interfaces. Cinder-volume status reserved, so I typed "cinder attachment-complete" and finally I could live migrate instances.
Any Idea why I got random unauthorized error for primary reason? Thank you y'all
By the way, my server environment are 20.04 wallaby.
summary, first migration was fine (101 --> 102)
but when I migrated to 102 -->101, it happened.
The instances name is molit-was01.
The all related logs are right above this writing.

** Affects: keystone
     Importance: Undecided
         Status: New

** Attachment added: "random unauthorized.docx"
   https://bugs.launchpad.net/bugs/2020766/+attachment/5675608/+files/random%20unauthorized.docx

** Summary changed:

- port already exist
+ random unauthorized error

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https://bugs.launchpad.net/bugs/2020766

Title:
  random unauthorized error

Status in OpenStack Identity (keystone):
  New

Bug description:
  Hello openstacker I need you guys help.
  I've tried live migrated hypervisor to another one.
  I've faced unauthorized error message. After that, I tried one more  time and I got new error message. It was "Binding failed for port b9bff40a-6794-4c6d-86a3-ccce8911ee51 and host . Error: (409 {"NeutronError": {"type": "PortBindingAlreadyExists", "message": "Binding for port b9bff40a-6794-4c6d-86a3-ccce8911ee51 on host  already exists.", "detail": ""}})". However, I restarted all neutron, nova daemons. It was not fixed. I decided to created new network interfaces which are same MAC addresses and IP. The issue was fixed, but I encounter another issue after creating new interfaces. Cinder-volume status reserved, so I typed "cinder attachment-complete" and finally I could live migrate instances.
  Any Idea why I got random unauthorized error for primary reason? Thank you y'all
  By the way, my server environment are 20.04 wallaby.
  summary, first migration was fine (101 --> 102)
  but when I migrated to 102 -->101, it happened.
  The instances name is molit-was01.
  The all related logs are right above this writing.

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