Comment 9 for bug 1347692

Hit this at http://logs.openstack.org/41/116741/4/check/check-tempest-dsvm-full/e165c84/, found in the glance-api logs:

2014-08-27 04:13:14.268 22185 INFO glance.wsgi.server [-] 127.0.0.1 - - [27/Aug/2014 04:13:14] "HEAD /v1/images/36d64eb9-8f79-4ef9-9dfc-30c7c0be2651 HTTP/1.1" 200 932 0.039862
2014-08-27 04:13:14.393 22185 DEBUG glance.registry.client.v1.client [-] Registry request PUT /images/c42364fe-3420-4532-83b4-3340e51acd67 HTTP 200 request id req-307dd390-a384-4bc4-98ff-e631e3dd7083 do_request /opt/stack/new/glance/glance/registry/client/v1/client.py:122
2014-08-27 04:13:14.394 22185 ERROR glance.api.v1.images [-] Copy from external source 'swift' failed for image: c42364fe-3420-4532-83b4-3340e51acd67
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images Traceback (most recent call last):
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images File "/opt/stack/new/glance/glance/api/v1/images.py", line 583, in _upload
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images dest=store)
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images File "/opt/stack/new/glance/glance/api/v1/images.py", line 453, in _get_from_store
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images context, where, dest=dest)
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images File "/opt/stack/new/glance/glance/store/__init__.py", line 266, in get_from_backend
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images return src_store.get(loc)
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images File "/opt/stack/new/glance/glance/store/http.py", line 123, in get
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images conn, resp, content_length = self._query(location, 'GET')
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images File "/opt/stack/new/glance/glance/store/http.py", line 179, in _query
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images raise exception.BadStoreUri(message=reason)
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images BadStoreUri: HTTP URL returned a 500 status code.
2014-08-27 04:13:14.394 22185 TRACE glance.api.v1.images
2014-08-27 04:13:14.791 22185 DEBUG glance.registry.client.v1.api [-] Adding image metadata... add_image_metadata /opt/stack/new/glance/glance/registry/client/v1/api.py:159
2014-08-27 04:13:14.792 22185 DEBUG glance.common.client [-] Constructed URL: http://0.0.0.0:9191/images _construct_url /opt/stack/new/glance/glance/common/client.py:413