Table creation race between glance-api and registry services

[Eoghan Glynn]

I'm seeing functional tests fail intermittently on Fedora-16, with the registry service failing to launch.

Examination of /var/log/messages reveals that the problem occurs when table creation is attempted for a table that already exists in the DB, presumably because it was just created by the newly launched glance-api service.

This appears to be a side-effect of the new v2 API direct usage of the registry DB (as opposed to always going through the REST API exposed by the glance-registry service, as was previously the case), which leads to a race condition when the two services are launched near simultaneously.

Though I've only seen this manifest in the tests, it could also conceivably occur for a fresh glance installation, if the services are launched in quick succession.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/7495

[Thierry Carrez (ttx)]

I think that was fixed by https://review.openstack.org/#/c/7582/ , reopen if you disagree.

[Eoghan Glynn (eglynn)]

> I think that was fixed by https://review.openstack.org/#/c/7582/ , reopen if you disagree.

Yes, Thierry, that is correct.