Router API easily fails when 8 concurrent calls. Neutron upstream jobs (rally_jobs) which ask for 10 concurrent calls shouldn't break the Router API.

http://artifacts.opnfv.org/airship/2YVEYPYMW8UN/airship-opnfv-functest-benchmarking-latest-rally_jobs-run-182/rally_jobs/rally_jobs.html

Here is a simple Rally task breaking airship with 8 concurrent calls

—
version: 2
title: Rally Task for OpenStack Neutron CI
description: >
The task contains various scenarios to prevent concurrency issues
subtasks:
-
title: Routers related workloads.
workloads:
-
scenario:
NeutronNetworks.create_and_list_routers:
network_create_args:
subnet_create_args:
subnet_cidr_start: "1.1.0.0/30"
subnets_per_network: 2
router_create_args:
runner:
constant:
times: 10
concurrency: 8
contexts:
users:
tenants: 1
users_per_tenant: 1
quotas:
neutron:
network: -1
subnet: -1
router: -1