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0e1f616
(Get the code!)
The cause of this error log is because concurrent operation. The steps are
1) A router is created.
2) router interface is added, and neutron will schedule the router to a l3-agent. It is the df-l3-agent in dragonflow's case. See [1]
3) When the l3-agent is chosen, and it will sync router from neutron-server. At the same time, it will update the router interface's bind-host, see [2].
4) In the update_port, neutron will check the port existence at the very beginning, see [3]
5) But the fullstack test will delete router soon after it is created. So, let's assume that the router and its interfaces are deleted after [3] but before [4]. From the log, DELETE request can be observed before the error update_
6) When code hit [4], it will report error as port can't be found.
[1] https:/
[2] https:/
[3] https:/
[4] https:/