Comment 11 for bug 1786703

Reviewed: https://review.openstack.org/597486
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=757983a4cfe3107ea6ffd0b416790ae23d91ef2e
Submitter: Zuul
Branch: master

commit 757983a4cfe3107ea6ffd0b416790ae23d91ef2e
Author: Chris Dent <email address hidden>
Date: Wed Aug 29 13:36:16 2018 +0100

    [placement] Make _ensure_aggregate context not independent

    The use of the independent context on _ensure_aggregate appears to
    be unnecessary. It causes file-based uses of SQLite dbs to fail
    (with database locked errors, as reported in the associated bug,
    1789633) and thus may mask issues with other databases. Adding the
    independent context manager was the result of a series of "throw
    stuff at the wall and see what sticks" patches, but it looks now
    that it is not required, and in some situations causes problems.

    Runs through the gate show that the behavior it was fixing (as
    described in bug 1786703) is not happening.

    Change-Id: I1f325d55ec256db34a4c3bbd230dcd8a91bce542
    Related-Bug: #1786703
    Closes-Bug: #1789633