Comment 12 for bug 1184807

Just to add:

https://review.openstack.org/40298 addressed the error encountered during while make a consolidated copy of instance's disk. The copied disk is then uploaded to glance and subsequently deleted. Should an unhandled exception be thrown during the driver's snapshot operation, the just-created snapshot entry along with any uploaded data will be removed from the glance server during cleanup. Given what you reported, it appears that disk copy succeeded. Is it possible that your devstack environment which likely house the glance image repository actually ran out of storage space while receiving a large snapshot image upload?