** Changed in: neutron
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/1435852
Title:
Use first() instead of one() in tunnel endpoint query
Status in neutron:
Invalid
Bug description:
Consider running neutron-server in the HA mode, Thread A is trying to delete
the endpoint for tunnel_ip=10.0.0.2.
https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/type_tunnel.py#L243
whereas, Thread B is trying to add the endpoint for tunnel_ip=10.0.0.2 which
is already existing so it will fall in except db_exc.DBDuplicateEntry and look
for ip_address. But Thread A could possibly delete it since both threads are
async. In that case, the query will raise an exception if we use one() instead
of first().
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