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Hi,
Had you tried removing oslo_db package?
I saw a similar issues and usually uninstalling or upgrading packages solved the problem

L.

-----Original Message-----
From: Mike Bayer [mailto:mbayer at redhat.com] 
Sent: Saturday, August 08, 2015 1:43 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: [openstack-dev] [nova] [oslo] troubling passing of unit tests on broken code

Just a heads up that this recently merged code is wrong:

https://review.openstack.org/#/c/192760/14/nova/tests/unit/db/test_migrations.py,cm

and here it is failing tests on my local env, as it does on my CI, as would be expected, there's a lot more if I keep it running:

http://paste.openstack.org/show/412236/

However, utterly weirdly, all those tests *pass* with the same versions of everything in the gate:

http://paste.openstack.org/show/412236/


I have no idea why this is.  This might be on the oslo.db side within 
the test_migrations logic, not really sure.    If someone feels like 
digging in, that would be great.

The failure occurs with both Alembic 0.7.7 and Alembic 0.8 as yet unreleased.  I have a feeling that releasing Alembic 0.8 may or may not bump this failure to be more widespread, just because of its apparent heisenbuggy nature, and I'm really hoping to release 0.8 next week.  It was supposed to be this week but I got sidetracked.



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