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[Bug 1820744] [NEW] conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol

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Public bug reported:

Hi,

In neutron-openvswitch-agent.log I got some error related to conntrack.
I'm not sure about when _delete_conntrack_state function is triggered.

>From the code it seem to be related to a port update.

Does it has something to do with the fact than during security group
rule creation sometime we could set a number[1] ?

2019-03-18 17:15:45.700 7 ERROR neutron.agent.linux.utils [-] Exit code: 2; Stdin: ; Stdout: ; Stderr: conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol
Try `conntrack -h' or 'conntrack --help' for more information.

2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack [-] Failed execute conntrack command ('conntrack', '-D', '-p', '0', '-f', 'ipv4', '-d', '192.168.3.25', '-w', 4591): ProcessExecutionError: Exit code: 2; Stdin: ; Stdout: ; Stderr: conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol
Try `conntrack -h' or 'conntrack --help' for more information.
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack Traceback (most recent call last):
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack   File "/var/lib/kolla/venv/local/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 165, in _delete_conntrack_state
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack     extra_ok_codes=[1])
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack   File "/var/lib/kolla/venv/local/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 147, in execute
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack     returncode=returncode)
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack ProcessExecutionError: Exit code: 2; Stdin: ; Stdout: ; Stderr: conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack Try `conntrack -h' or 'conntrack --help' for more information.
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack 
2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack 

This happens on Rocky version.

[1] https://github.com/openstack/python-
openstackclient/blob/4bde9af89251431791fc8d69fe09d5e17a8fba8f/openstackclient/network/v2/security_group_rule.py#L155-L164

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1820744

Title:
  conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol

Status in neutron:
  New

Bug description:
  Hi,

  In neutron-openvswitch-agent.log I got some error related to
  conntrack. I'm not sure about when _delete_conntrack_state function is
  triggered.

  From the code it seem to be related to a port update.

  Does it has something to do with the fact than during security group
  rule creation sometime we could set a number[1] ?

  2019-03-18 17:15:45.700 7 ERROR neutron.agent.linux.utils [-] Exit code: 2; Stdin: ; Stdout: ; Stderr: conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol
  Try `conntrack -h' or 'conntrack --help' for more information.

  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack [-] Failed execute conntrack command ('conntrack', '-D', '-p', '0', '-f', 'ipv4', '-d', '192.168.3.25', '-w', 4591): ProcessExecutionError: Exit code: 2; Stdin: ; Stdout: ; Stderr: conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol
  Try `conntrack -h' or 'conntrack --help' for more information.
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack Traceback (most recent call last):
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack   File "/var/lib/kolla/venv/local/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 165, in _delete_conntrack_state
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack     extra_ok_codes=[1])
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack   File "/var/lib/kolla/venv/local/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 147, in execute
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack     returncode=returncode)
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack ProcessExecutionError: Exit code: 2; Stdin: ; Stdout: ; Stderr: conntrack v1.4.4 (conntrack-tools): `0' unsupported protocol
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack Try `conntrack -h' or 'conntrack --help' for more information.
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack 
  2019-03-18 17:15:45.701 7 ERROR neutron.agent.linux.ip_conntrack 

  This happens on Rocky version.

  [1] https://github.com/openstack/python-
  openstackclient/blob/4bde9af89251431791fc8d69fe09d5e17a8fba8f/openstackclient/network/v2/security_group_rule.py#L155-L164

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