** Changed in: nova
Status: Fix Committed => Fix Released
** Changed in: nova
Milestone: None => juno-rc1
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1298420
Title:
Libvirt's image caching fetches images multiple times
Status in OpenStack Compute (Nova):
Fix Released
Bug description:
When launching several VMs in rapid succession, it is possible that
libvirt's image caching will fetch the same image several times. This
can occur when all of the VMs in question are using the same base
image and this base image has not been previously fetched. The inline
fetch_func_sync method prevents multiple threads from fetching the
same image at the same time, but it does not prevent a thread that is
waiting to acquire the lock from fetching the image that was being
fetched while the lock was still in use. This is because the presence
of the image is checked only before the lock has been acquired, not
after.
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