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[Slawek Kaplonski <2000150@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Test
neutron.tests.fullstack.test_dhcp_agent.TestDhcpAgentHA.test_multiple_agents_for_network
is failing pretty often recently.

Stacktrace:

ft1.3: neutron.tests.fullstack.test_dhcp_agent.TestDhcpAgentHA.test_multiple_agents_for_network(Linux bridge agent)testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/common/utils.py", line 724, in wait_until_true
    eventlet.sleep(sleep)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-fullstack-gate/lib/python3.10/site-packages/eventlet/greenthread.py", line 36, in sleep
    hub.switch()
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-fullstack-gate/lib/python3.10/site-packages/eventlet/hubs/hub.py", line 313, in switch
    return self.greenlet.switch()
eventlet.timeout.Timeout: 60 seconds

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/base.py", line 182, in func
    return f(self, *args, **kwargs)
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_dhcp_agent.py", line 201, in test_multiple_agents_for_network
    self._spawn_vm()
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_dhcp_agent.py", line 75, in _spawn_vm
    vm.block_until_dhcp_config_done()
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/resources/machine.py", line 217, in block_until_dhcp_config_done
    utils.wait_until_true(
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/common/utils.py", line 728, in wait_until_true
    raise exception
neutron.tests.common.machine_fixtures.FakeMachineException: Address 10.0.0.229/24 or gateway 10.0.0.1 not configured properly on port test-veth1b4334

Failure examples:

https://36ccf3feef294bb781ed-88f13fe1d2cd9b64afb4d1818492b226.ssl.cf1.rackcdn.com/866225/4/gate/neutron-
fullstack-with-uwsgi/d5c1b53/testr_results.html

https://51698b00592e877a0023-3a9e3dcf5065ad1abf1d1a27741d8ba4.ssl.cf1.rackcdn.com/865822/2/check/neutron-
fullstack-with-uwsgi/e813f7e/testr_results.html

** Affects: neutron
     Importance: Critical
         Status: Confirmed


** Tags: fullstack

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https://bugs.launchpad.net/bugs/2000150

Title:
  Fullstack dhcp test test_multiple_agents_for_network is failing
  intermittently

Status in neutron:
  Confirmed

Bug description:
  Test
  neutron.tests.fullstack.test_dhcp_agent.TestDhcpAgentHA.test_multiple_agents_for_network
  is failing pretty often recently.

  Stacktrace:

  ft1.3: neutron.tests.fullstack.test_dhcp_agent.TestDhcpAgentHA.test_multiple_agents_for_network(Linux bridge agent)testtools.testresult.real._StringException: Traceback (most recent call last):
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/common/utils.py", line 724, in wait_until_true
      eventlet.sleep(sleep)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-fullstack-gate/lib/python3.10/site-packages/eventlet/greenthread.py", line 36, in sleep
      hub.switch()
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-fullstack-gate/lib/python3.10/site-packages/eventlet/hubs/hub.py", line 313, in switch
      return self.greenlet.switch()
  eventlet.timeout.Timeout: 60 seconds

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/base.py", line 182, in func
      return f(self, *args, **kwargs)
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_dhcp_agent.py", line 201, in test_multiple_agents_for_network
      self._spawn_vm()
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_dhcp_agent.py", line 75, in _spawn_vm
      vm.block_until_dhcp_config_done()
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/resources/machine.py", line 217, in block_until_dhcp_config_done
      utils.wait_until_true(
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/common/utils.py", line 728, in wait_until_true
      raise exception
  neutron.tests.common.machine_fixtures.FakeMachineException: Address 10.0.0.229/24 or gateway 10.0.0.1 not configured properly on port test-veth1b4334

  Failure examples:

  https://36ccf3feef294bb781ed-88f13fe1d2cd9b64afb4d1818492b226.ssl.cf1.rackcdn.com/866225/4/gate/neutron-
  fullstack-with-uwsgi/d5c1b53/testr_results.html

  https://51698b00592e877a0023-3a9e3dcf5065ad1abf1d1a27741d8ba4.ssl.cf1.rackcdn.com/865822/2/check/neutron-
  fullstack-with-uwsgi/e813f7e/testr_results.html

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