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[Dave Walker <email@xxxxxxxxxx>]

** Also affects: neutron/kilo
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1550623

Title:
  Functional ARPSpoofTestCase's occasionally fail

Status in neutron:
  Fix Released
Status in neutron kilo series:
  Fix Committed

Bug description:
  We occasionally get failures in the gate like the one below.
  Unfortunately they are difficult to reproduce locally.

  ft32.3: neutron.tests.functional.agent.test_ovs_flows.ARPSpoofOFCtlTestCase.test_arp_spoof_allowed_address_pairs(native)_StringException: Empty attachments:
    stderr
    stdout

  pythonlogging:'': {{{
  DEBUG [oslo_policy._cache_handler] Reloading cached file /opt/stack/new/neutron/neutron/tests/etc/policy.json
     DEBUG [oslo_policy.policy] Reloaded policy file: /opt/stack/new/neutron/neutron/tests/etc/policy.json
  }}}

  Traceback (most recent call last):
    File "neutron/tests/functional/agent/test_ovs_flows.py", line 202, in test_arp_spoof_allowed_address_pairs
      net_helpers.assert_ping(self.src_namespace, self.dst_addr, count=2)
    File "neutron/tests/common/net_helpers.py", line 102, in assert_ping
      dst_ip])
    File "neutron/agent/linux/ip_lib.py", line 885, in execute
      log_fail_as_error=log_fail_as_error, **kwargs)
    File "neutron/agent/linux/utils.py", line 140, in execute
      raise RuntimeError(msg)
  RuntimeError: Exit code: 1; Stdin: ; Stdout: PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data.

  --- 192.168.0.2 ping statistics ---
  2 packets transmitted, 0 received, 100% packet loss, time 1006ms

  ; Stderr:

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