Hello Rodolfo

> Do you have the full ovs-agent log? I say that because the one attached is very limited.
Atached new logs neutron-openvswitch-agent-full.log (search 'is not a positive integer' for ~ timestamp)

> I have one more question: why are you stopping the VM manually? Instead of using the OpenStack commands: server stop, server start, etc.

Actually I stop the VM using openstack CLI. In the issue description I am stopping it manually to show reproduction by steps (to elliminate race between libvirt and rcp_loop calls).


I wrote a small bash script using witch I managed to get reproduction.

So, I have two VMs:

[root@sqvm2-0506 ~]# openstack server list
+--------------------------------------+------+--------+---------------------+-------+--------+
| ID                                   | Name | Status | Networks            | Image | Flavor |
+--------------------------------------+------+--------+---------------------+-------+--------+
| 968eb966-77d7-4668-a2bf-226284661ee8 | vm-2 | ACTIVE | net1=192.168.128.18 |       | tiny   |
| ef1afb42-ab8f-448b-876c-b1705e718ec5 | vm-1 | ACTIVE | net1=192.168.128.13 |       | tiny   |
+--------------------------------------+------+--------+---------------------+-------+--------+
[root@sqvm2-0506 ~]#

[root@sqvm2-0506 ~]# openstack port list | grep 192.168.128.13
| fce15578-ba1c-4e96-a8ba-1612b389aada |      | fa:16:3e:d5:10:62 | ip_address='192.168.128.13', subnet_id='868b4265-f7b9-4bb0-845c-6a05a56a4eaa' | ACTIVE |
[root@sqvm2-0506 ~]#


Mac 'fa:16:3e:d5:10:62' is the address of vm-1

[root@sqvm2-0506 ~]# cat test.sh
#!/usr/bin/env bash

set -e
step=0

while :; do
    echo "Step N=${step}" && ((step++)) || true
    openstack --insecure server add network vm-2 net2 1>/dev/null &
    pid=$!
    openstack --insecure server stop vm-1 1>/dev/null
    wait "${pid}"

    sleep 30  # give time to VM stopping and rpc_loop ports processing
    ovs-ofctl dump-flows br-int | grep fa:16:3e:d5:10:62 && { echo "Got it, exit"; exit 1; }

    openstack --insecure server remove network vm-2 net2 1>/dev/null
    openstack --insecure server start vm-1 1>/dev/null
    sleep 30  # give time to VM start
done
[root@sqvm2-0506 ~]#

[root@sqvm2-0506 ~]# /bin/bash test.sh
Step N=0
 cookie=0x9e2f137c9b53b412, duration=239.247s, table=60, n_packets=67, n_bytes=7398, idle_age=329, priority=90,dl_vlan=1,dl_dst=fa:16:3e:d5:10:62 actions=load:0x24->NXM_NX_REG5[],load:0x1->NXM_NX_REG6[],strip_vlan,resubmit(,81)
 cookie=0x9e2f137c9b53b412, duration=239.246s, table=73, n_packets=0, n_bytes=0, idle_age=357, priority=100,reg6=0x1,dl_dst=fa:16:3e:d5:10:62 actions=load:0x24->NXM_NX_REG5[],resubmit(,81)
Got it, exit
[root@sqvm2-0506 ~]#
[root@sqvm2-0506 ~]# openstack server list
+--------------------------------------+------+---------+----------------------------------------+-------+--------+
| ID                                   | Name | Status  | Networks                               | Image | Flavor |
+--------------------------------------+------+---------+----------------------------------------+-------+--------+
| 968eb966-77d7-4668-a2bf-226284661ee8 | vm-2 | ACTIVE  | net2=192.168.5.15; net1=192.168.128.18 |       | tiny   |
| ef1afb42-ab8f-448b-876c-b1705e718ec5 | vm-1 | SHUTOFF | net1=192.168.128.13                    |       | tiny   |
+--------------------------------------+------+---------+----------------------------------------+-------+--------+
[root@sqvm2-0506 ~]#
[root@sqvm2-0506 ~]# ovs-ofctl dump-flows br-int | grep fa:16:3e:d5:10:62
 cookie=0x9e2f137c9b53b412, duration=584.966s, table=60, n_packets=67, n_bytes=7398, idle_age=675, priority=90,dl_vlan=1,dl_dst=fa:16:3e:d5:10:62 actions=load:0x24->NXM_NX_REG5[],load:0x1->NXM_NX_REG6[],strip_vlan,resubmit(,81)
 cookie=0x9e2f137c9b53b412, duration=584.965s, table=73, n_packets=0, n_bytes=0, idle_age=702, priority=100,reg6=0x1,dl_dst=fa:16:3e:d5:10:62 actions=load:0x24->NXM_NX_REG5[],resubmit(,81)
[root@sqvm2-0506 ~]#


Looks like I was lucky to get it on the first iter.