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[Augustina Ragwitz <1571722@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

We are seeing some bug reports coming in where users experience an
"Unexpected Exception" error when neutronclient fails. This is not
particularly helpful for anyone experiencing this issue and it would be
nice to have something more specific to aid in troubleshooting.

We could arguably blanket wrap all connection failures from
neutronclient in nova.network.neutronv2.api and raise those up as
something more specific. See cinderclient usage in nova, for example.

like https://github.com/openstack/python-
neutronclient/blob/master/neutronclient/common/exceptions.py#L204 or
https://github.com/openstack/python-
neutronclient/blob/master/neutronclient/common/exceptions.py#L109

** Affects: nova
     Importance: Medium
         Status: Confirmed


** Tags: api neutron

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https://bugs.launchpad.net/bugs/1571722

Title:
  Neutronclient failures throw unhelpful "Unexpected Exception"

Status in OpenStack Compute (nova):
  Confirmed

Bug description:
  We are seeing some bug reports coming in where users experience an
  "Unexpected Exception" error when neutronclient fails. This is not
  particularly helpful for anyone experiencing this issue and it would
  be nice to have something more specific to aid in troubleshooting.

  We could arguably blanket wrap all connection failures from
  neutronclient in nova.network.neutronv2.api and raise those up as
  something more specific. See cinderclient usage in nova, for example.

  like https://github.com/openstack/python-
  neutronclient/blob/master/neutronclient/common/exceptions.py#L204 or
  https://github.com/openstack/python-
  neutronclient/blob/master/neutronclient/common/exceptions.py#L109

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