test_dvr_fip_and_router_namespace_rules_with_address_scopes_match iptables failure

[Jakub Libosvar]

The functional test neutron.tests.functional.agent.l3.extensions.qos.test_fip_qos_extension.TestL3AgentFipQosExtensionDVR .test_dvr_fip_and_router_namespace_rules_with_address_scopes_match failed because of iptables failed to commit:

ft1.1: neutron.tests.functional.agent.l3.extensions.qos.test_fip_qos_extension.TestL3AgentFipQosExtensionDVR.test_dvr_fip_and_router_namespace_rules_with_address_scopes_matchtesttools.testresult.real._StringException: Traceback (most recent call last):
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/iptables_manager.py", line 432, in defer_apply
    self.defer_apply_off()
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/iptables_manager.py", line 446, in defer_apply_off
    self._apply()
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/iptables_manager.py", line 464, in _apply
    first = self._apply_synchronized()
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/iptables_manager.py", line 623, in _apply_synchronized
    raise err
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/iptables_manager.py", line 513, in _do_run_restore
    linux_utils.execute(args, process_input='\n'.join(commands),
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/utils.py", line 156, in execute
    raise exceptions.ProcessExecutionError(msg,
neutron_lib.exceptions.ProcessExecutionError: Exit code: 1; Cmd: ['ip', 'netns', 'exec', 'qrouter-c42abcb5-207c-43c1-9082-c97c7119066b', 'iptables-restore', '-n', '-w', '10', '-W', 200000]; Stdin: # Generated by iptables_manager
*filter
-D run.py-scope 3
COMMIT
# Completed by iptables_manager
# Generated by iptables_manager
*mangle
-D run.py-scope 3
COMMIT
# Completed by iptables_manager
; Stdout: ; Stderr: iptables-restore: line 3 failed

https://bfef12d50a901fd19bfa-41761a29591b60104749264f30dd0204.ssl.cf5.rackcdn.com/804120/1/check/neutron-functional-with-uwsgi/c2fb7e2/testr_results.html

[Miguel Lavalle (minsel)]

Was this failure a one of? Or are we seeing this test failing repeatedly?

[Jakub Libosvar (libosvar)]

It looks like it's just one time - I just checked on logstash
http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22Stdout%3A%20%3B%20Stderr%3A%20iptables-restore%3A%20line%203%20failed%5C%22%20AND%20build_name%3A%5C%22neutron-functional-with-uwsgi%5C%22

and it appears only in the job I linked.

[Miguel Lavalle (minsel)]

In that case I'll mark it invalid for now. We can change it if we find more evidence