MySQL indexer might die with a deadlock

[Julien Danjou]

This is a MySQL issue, but we might try to fix it with various retries. oslo.db might have code to help.

http://logs.openstack.org/20/198020/1/check/gate-gnocchi-python34/91c5738/console.html

[Chris Dent (cdent)]

another log for sake of reference: http://logs.openstack.org/07/165407/29/check/gate-gnocchi-python34/e0cdf34/console.html#_2015-08-05_17_18_21_007

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/234656

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/234656
Committed: https://git.openstack.org/cgit/openstack/gnocchi/commit/?id=2e3a8079c5b6524b23a49fe4033899297abacbe3
Submitter: Jenkins
Branch: master

commit 2e3a8079c5b6524b23a49fe4033899297abacbe3
Author: Julien Danjou <email address hidden>
Date: Wed Oct 14 11:13:49 2015 +0200

    sqlalchemy: use retry_on_deadlock in update_resource()

    MySQL is pretty bad at handling UPDATE conflicts and raises deadlock
    errors from time to time, even in our functional tests. Let's use the
    oslo_db.api.retry_on_deadlock decorator to retry if it happens.

    Change-Id: Idf366a3a3232046046075e0927d7c805b50ae1e0
    Closes-Bug: #1471169