glance/releasenotes/notes/import-locking-behavior-901...

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---
fixes:
- |
Bug 1884596_: A change was added to the import API which provides
time-based locking of an image to exclude other import operations
from starting until the lock-holding task completes. The lock is
based on the task that we start to do the work, and the UUID of
that task is stored in the ``os_glance_import_task`` image property,
which indicates who owns the lock. If the task holding the lock fails
to make progress for 60 minutes, another import operation will be
allowed to steal the lock and start another import operation.
.. _1884596: https://bugs.launchpad.net/glance/+bug/1884596