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[Bernard Cafarelli <2006953@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In recent weeks this job started to fail regularly on stable/wallaby (not 100% some backports are passing)
neutron_tempest_plugin.scenario.test_security_groups.NetworkSecGroupTest.test_established_tcp_session_after_re_attachinging_sg

Most of the time this was seen in neutron-tempest-plugin-scenario-
openvswitch-iptables_hybrid-wallaby job

Two recent backports affected by issue:
https://review.opendev.org/c/openstack/neutron/+/871759
https://review.opendev.org/c/openstack/neutron/+/868087

And some sample logs:
https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_26b/871759/2/check/neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid-wallaby/26b64ec/testr_results.html
https://f450bef156b424c8c132-a0541882d2023eca9a1cc07087449de0.ssl.cf1.rackcdn.com/868087/3/check/neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid-wallaby/55a6ead/testr_results.html


Traceback (most recent call last):
  File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/common/utils.py", line 80, in wait_until_true
    eventlet.sleep(sleep)
  File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/eventlet/greenthread.py", line 36, in sleep
    hub.switch()
  File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/eventlet/hubs/hub.py", line 313, in switch
    return self.greenlet.switch()
eventlet.timeout.Timeout: 10 seconds

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/scenario/test_security_groups.py", line 320, in test_established_tcp_session_after_re_attachinging_sg
    con.test_connection(should_pass=False)
  File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/common/utils.py", line 202, in test_connection
    wait_until_true(
  File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/common/utils.py", line 85, in wait_until_true
    raise WaitTimeout("Timed out after %d seconds" % timeout)
neutron_tempest_plugin.common.utils.WaitTimeout: Timed out after 10 seconds

I wonder if this is similar to
https://bugs.launchpad.net/neutron/+bug/1936911 where the test was
unstable on linuxbridge backend

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: gate-failure stable

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https://bugs.launchpad.net/bugs/2006953

Title:
  [stable/wallaby] test_established_tcp_session_after_re_attachinging_sg
  is unstable on ML2/OVS iptables_hybrid job

Status in neutron:
  New

Bug description:
  In recent weeks this job started to fail regularly on stable/wallaby (not 100% some backports are passing)
  neutron_tempest_plugin.scenario.test_security_groups.NetworkSecGroupTest.test_established_tcp_session_after_re_attachinging_sg

  Most of the time this was seen in neutron-tempest-plugin-scenario-
  openvswitch-iptables_hybrid-wallaby job

  Two recent backports affected by issue:
  https://review.opendev.org/c/openstack/neutron/+/871759
  https://review.opendev.org/c/openstack/neutron/+/868087

  And some sample logs:
  https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_26b/871759/2/check/neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid-wallaby/26b64ec/testr_results.html
  https://f450bef156b424c8c132-a0541882d2023eca9a1cc07087449de0.ssl.cf1.rackcdn.com/868087/3/check/neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid-wallaby/55a6ead/testr_results.html

  
  Traceback (most recent call last):
    File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/common/utils.py", line 80, in wait_until_true
      eventlet.sleep(sleep)
    File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/eventlet/greenthread.py", line 36, in sleep
      hub.switch()
    File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/eventlet/hubs/hub.py", line 313, in switch
      return self.greenlet.switch()
  eventlet.timeout.Timeout: 10 seconds

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/scenario/test_security_groups.py", line 320, in test_established_tcp_session_after_re_attachinging_sg
      con.test_connection(should_pass=False)
    File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/common/utils.py", line 202, in test_connection
      wait_until_true(
    File "/opt/stack/tempest/.tox/tempest/lib/python3.8/site-packages/neutron_tempest_plugin/common/utils.py", line 85, in wait_until_true
      raise WaitTimeout("Timed out after %d seconds" % timeout)
  neutron_tempest_plugin.common.utils.WaitTimeout: Timed out after 10 seconds

  I wonder if this is similar to
  https://bugs.launchpad.net/neutron/+bug/1936911 where the test was
  unstable on linuxbridge backend

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