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[Launchpad Bug Tracker <1966383@xxxxxxxxxxxxxxxxxx>]

[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1966383

Title:
  ovs-agent: value -1 is not a valid port number when _set_port_filters

Status in neutron:
  Expired

Bug description:
  env:
     neutron version: victoria
        ovs-vsctl (Open vSwitch) 2.13.5
     /etc/neutron/plugins/ml2/openvswitch_agent.ini:firewall_driver=openvswitch

  reproduce the problem:
      $ openstack server delete xxx

  Reason for error：
  The port update and port remove events with very close timing.
  When the update event is processed, the ovs port has been deleted. When get_or_create_ofport reads the ovs port information from ovsdb, the port still exists but the obtained ofport=-1.
  Using ofport=-1 to call _update_flows_for_port or _set_port_filters to handle the openflow table will report the following error

  error log:
  INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [None req-984032db-a239-47ef-b80e-9064f5788a8b - - - - -] Port 61a04bae-b608-47cf-bb77-3e3a63def50c updated. Details: {'device': '61a04bae-b608-47cf-bb77-3e3a63def50c', 'device_id': '9a158b27-8ae8-4afd-ba8e-8e56247ac868', 'network_id': 'b225d077-0558-4b64-b32a-36217767e54f', 'port_id': '61a04bae-b608-47cf-bb77-3e3a63def50c', 'mac_address': 'fa:16:3e:ae:77:28', 'admin_state_up': True, 'network_type': 'vxlan', 'segmentation_id': 57, 'physical_network': None, 'fixed_ips': [{'subnet_id': '557d4d98-5e51-480b-8db5-a7f6adc615d7', 'ip_address': '172.31.16.184'}], 'device_owner': 'compute:az-x86-up-1', 'allowed_address_pairs': [], 'port_security_enabled': True, 'qos_policy_id': None, 'network_qos_policy_id': None, 'profile': {}, 'vif_type': 'ovs', 'vnic_type': 'normal', 'security_groups': ['05a2d0ca-df71-4ef4-92d3-1464a94c8e11']}
  INFO neutron.agent.securitygroups_rpc [None req-984032db-a239-47ef-b80e-9064f5788a8b - - - - -] Refresh firewall rules

  ERROR neutron.agent.linux.utils [None req-984032db-a239-47ef-b80e-9064f5788a8b - - - - -] Exit code: 1; Cmd: ['ovs-ofctl', 'add-flows', '-O', 'OpenFlow10', 'br-int', '--bundle', '-']; Stdin: hard_timeout=0,idle_timeout=0,priority=100,table=60,in_port=-1,cookie=6616235460093723383,actions=set_field:-1->reg5,set_field:9->reg6,resubmit(,71)
  hard_timeout=0,idle_timeout=0,priority=90,table=60,dl_dst=fa:16:3e:ae:77:28,dl_vlan=0x9,cookie=6616235460093723383,actions=set_field:-1->reg5,set_field:9->reg6,strip_vlan,resubmit(,81)
  hard_timeout=0,idle_timeout=0,priority=95,table=71,in_port=-1,dl_type=0x86dd,nw_proto=58,icmp_type=130,reg5=-1,cookie=6616235460093723383,actions=resubmit(,94)
  hard_timeout=0,idle_timeout=0,priority=95,table=71,in_port=-1,dl_type=0x86dd,nw_proto=58,icmp_type=133,reg5=-1,cookie=6616235460093723383,actions=resubmit(,94)
  hard_timeout=0,idle_timeout=0,priority=95,table=71,in_port=-1,dl_type=0x86dd,nw_proto=58,icmp_type=135,reg5=-1,cookie=6616235460093723383,actions=resubmit(,94)
  hard_timeout=0,idle_timeout=0,priority=95,table=71,in_port=-1,dl_type=0x86dd,nw_proto=58,icmp_type=136,reg5=-1,cookie=6616235460093723383,actions=resubmit(,94)
  hard_timeout=0,idle_timeout=0,priority=95,table=71,in_port=-1,dl_src=fa:16:3e:ae:77:28,dl_type=0x0806,arp_spa=172.31.16.184,reg5=-1,cookie=6616235460093723383,actions=resubmit(,94)
  hard_timeout=0,idle_timeout=0,priority=77,dl_type=0x0800,table=72,nw_proto=6,ct_state=+new-est,reg5=-1,cookie=6616235460093723383,actions=resubmit(,73); Stdout: ; Stderr: 2022-03-25T01:41:27Z|00001|ofp_port|WARN|Negative value -1 is not a valid port number.
  ovs-ofctl: -:1: -1: invalid or unknown port for in_port
  ...

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