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[Louis Taylor <kragniz@xxxxxxxxx>]

** Also affects: glance-store
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1379798

Title:
  Glance returns HTTPInternalServerError 500 in case of image server is
  down

Status in OpenStack Image Registry and Delivery Service (Glance):
  Triaged
Status in OpenStack Glance backend store-drivers library (glance_store):
  Triaged

Bug description:
  HTTPInternalServerError 500 response is returned to the user while image server is down during downloading the image.
  When user tries to download the image from the remote location (image server) which is down, Connection refused ECONNREFUSED error is raised on the glance server.

  Ideally it should return 503 HTTPServiceUnavailable response to the
  user.

  Steps to reproduce:

  1. Create a file 'test_image.py' at any location. example: /home/openstack/
  2. Run Simple HTTP server using "python -m SimpleHTTPServer 8050" from location mentioned in step 1.
  3. Create an image using location parameter.
  example: glance image-create --name myimage --disk-format=raw --container-format=bare --location http://10.69.4.178:8050/test_image.py
  4. Stop Simple HTTP server.
  5. Download image using  glance image-download <image_id> created in step 3.

  Please refer http://paste.openstack.org/show/120165/ for v1 and v2 api
  logs.

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