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["Dr. Jens Harbott" <j.harbott@xxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1539640

Title:
  Make dhcp agent not recycle ports in binding_failed state

Status in neutron:
  Fix Released

Bug description:
  We just happened to have broken dhcp because the dhcp ports were in
  binding_failed state.

  We tried to disable/enable dhcp again, but apparently (not 100% sure,
  unfortunately), disabling didn't remove the ports (assuming that it
  was because they were in binding_failed state) and re-enabling just
  ended up with ports in binding_failed states again (likely the same
  ports because dhcp agent tries to recycle ports whenever possible).
  Unfortunately, I don't have the logs / traces of this.

  So disabling / re-enabling didn't fix anything while, I believe, users
  would try that first to fix the situation. If we could make that just
  work, then that would make it easier for people to get out of this "no
  dhcp" problem when ports are failing to bind.

  In the end, we had to remove the ports to have new ports created when
  dhcp was disable / re-enabled.

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