cinder/releasenotes/notes/notes-for-15.4.0-release-98...

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---
prelude: |
The Cinder project team would like to point out some issues addressed
by this release:
* The online data migrations for Train have been updated to address
an upgrade issue (`Bug #1893107
<https://bugs.launchpad.net/cinder/+bug/1893107>`_). The issue does
not manifest itself in the Train release of cinder, but under specific
circumstances it can prevent a cinder database upgrade from Train to
Ussuri. See the "Upgrade Notes" and "Bug Fixes" sections below for
more information.
* This release improves the handling of the ``__DEFAULT__`` volume-type
(see "Other Notes", below) and fixes `Bug #1879578
<https://bugs.launchpad.net/cinder/+bug/1879578>`_, in which the
default type was applied too aggressively (see the discussion of
this issue in "Bug Fixes", below).
* Operators affected by `OSSN-0086
<https://wiki.openstack.org/wiki/OSSN/OSSN-0086>`_ should note that
this release updates the os-brick library used by cinder to version
2.10.5 in order to address an issue associated with the previous
fixes for `Bug #1823200
<https://bugs.launchpad.net/cinder/+bug/1823200>`_.
upgrade:
- |
This release updates the os-brick library used by Cinder to version
2.10.5 to correct hopefully the final problem with the fix for
`Bug #1823200
<https://bugs.launchpad.net/cinder/+bug/1823200>`_ in the previous
os-brick release.
See the `os-brick 2.10.5 release notes
<https://docs.openstack.org/releasenotes/os-brick/train.html#relnotes-2-10-5-stable-train>`_
for more information.