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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1213880

Title:
  glance upload to rbd creates zero length image

Status in OpenStack Image Registry and Delivery Service (Glance):
  Fix Released

Bug description:
  If using upload() from V2 Glance API to write data to an RBD image the
  following problem occurs:

  A length of zero can be used which means an image of size 0 is created
  thus resulting in the following exception:

  2013-08-19 12:09:36.044 31475 ERROR glance.api.v2.image_data [e9a89f79-d9ed-40b7-a1a0-157f6eb2b3d1 5cdd3419b10e4459a12593282f483331 9f93fd6845f04c6c9b51dcc9e24008a1] Failed to upload image data due to internal error
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data Traceback (most recent call last):
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/api/v2/image_data.py", line 53, in upload
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     image.set_data(data, size)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/domain/proxy.py", line 126, in set_data
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     self.base.set_data(data, size)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/notifier/__init__.py", line 201, in set_data
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     self.image.set_data(data, size)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/domain/proxy.py", line 126, in set_data
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     self.base.set_data(data, size)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/store/__init__.py", line 647, in set_data
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     self.image.image_id, utils.CooperativeReader(data), size)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/store/__init__.py", line 363, in add_to_backend
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     return store_add_to_backend(image_id, data, size, store)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/store/__init__.py", line 341, in store_add_to_backend
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     (location, size, checksum, metadata) = store.add(image_id, data, size)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/opt/stack/glance/glance/store/rbd.py", line 287, in add
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     offset += image.write(chunk, offset)
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data   File "/usr/lib/python2.7/dist-packages/rbd.py", line 648, in write
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data     raise make_ex(ret, "error writing to %s" % (self.name,))
  2013-08-19 12:09:36.044 31475 TRACE glance.api.v2.image_data InvalidArgument: error writing to 4c3712f8-e6ef-4b39-aaf0-975f046252f4

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