Comment 0 for bug 1364814

When I set api_workers > 0 in Neutron configuration, delelting or adding router interface, Neutron L3 agent can't receive message from Neutron Server.
In this situation, L3 agent report state can cast to Neutron Server, meanwhile it can receive cast message from Neutron Server.(use call method)

Obviously, Neutron Server can use cast method for sending message to L3 agent, But why cast routers_updated fails? This also occurs in other Neutron agent.

Then I make a test, write some codes in Neutron server starts or l3_router_plugins, sends cast periodic message to L3 agent directly. From L3 agent rpc-zmq-receiver log file shows it receives message from Neutron Server.

By the way, all things well when api_workers = 0.

Test environment:
neutron(master) + oslo.messaging(master) + zeromq