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[OpenStack Infra <1599574@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/338397
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=e8ac4b402ab4966381014b58f660ba651b2a8706
Submitter: Jenkins
Branch:    master

commit e8ac4b402ab4966381014b58f660ba651b2a8706
Author: Henry Gessau <HenryG@xxxxxxxxxx>
Date:   Wed Jul 6 16:51:04 2016 +0000

    Revert "Support unique labels for alembic branches"
    
    A problem was found with the --expand (and --contract) options, see the bug report. I am reverting this patch so that I can redo it and have one single patch that can be back-ported.
    
    Closes-Bug: #1599574
    
    This reverts commit 88359e3fe91b7e8f430b48da30b6d4f1ddf17d62.
    
    Change-Id: Iebca469c6fec32bac0480be6627ad5e9dedaad9d


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1599574

Title:
  "upgrade --expand" alembic migration failure

Status in neutron:
  Fix Released

Bug description:
  When installing neutron from source, specifically the versions:

  neutron (9.0.0.0b2.dev383)
  neutron-fwaas (9.0.0.0b2.dev20)
  neutron-lbaas (9.0.0.0b2.dev44)
  neutron-lib (0.2.0)
  neutron-vpnaas (9.0.0.0b2.dev10)

  using pip requirements of:

  git+https://git.openstack.org/openstack/neutron@master#egg=neutron
  git+https://git.openstack.org/openstack/neutron-fwaas@master#egg=neutron-fwaas
  git+https://git.openstack.org/openstack/neutron-lbaas@master#egg=neutron-lbaas
  git+https://git.openstack.org/openstack/neutron-vpnaas@master#egg=neutron-vpnaas

  And then running:

  neutron-db-manage upgrade --expand

  We are seeing:

  INFO  [alembic.runtime.migration] Context impl MySQLImpl.
  INFO  [alembic.runtime.migration] Will assume non-transactional DDL.
    Running upgrade (expand) for neutron ...
  INFO  [alembic.runtime.migration] Context impl MySQLImpl.
  INFO  [alembic.runtime.migration] Will assume non-transactional DDL.
    OK
  INFO  [alembic.runtime.migration] Context impl MySQLImpl.
  INFO  [alembic.runtime.migration] Will assume non-transactional DDL.
    Running upgrade (expand) for neutron-fwaas ...
  INFO  [alembic.runtime.migration] Context impl MySQLImpl.
  INFO  [alembic.runtime.migration] Will assume non-transactional DDL.
  ERROR [alembic.util.messaging] Can't locate revision identified by 'neutron-fwaas-expand'
    FAILED: Can't locate revision identified by 'neutron-fwaas-expand'

  The issue is reproducible in the OpenStack-Ansible os_neutron role
  gate checks:

  https://review.openstack.org/#/q/project:openstack/openstack-ansible-
  os_neutron+status:+open

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