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[Bug 1463800] [NEW] Confusing errors appears after running netns-cleanup with --force attribute

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Public bug reported:

The setup: Controller, Compute and 2 Network nodes 
KILO - VRRP on RHEL7.1

Trying to delete all "alive" namespaces (alive - router with attached interface to the network)
The command succeeded but  a lot of error messages appears.

 neutron-netns-cleanup --config-file=/etc/neutron/neutron.conf --config-file=/etc/neutron/dhcp_agent.ini --force
2015-06-07 11:41:14.760 2623 INFO neutron.common.config [-] Logging enabled!
2015-06-07 11:41:14.761 2623 INFO neutron.common.config [-] /usr/bin/neutron-netns-cleanup version 2015.1.0
2015-06-07 11:41:16.777 2623 WARNING oslo_config.cfg [-] Option "use_namespaces" from group "DEFAULT" is deprecated for removal.  Its value may be silently ignored in the future.
2015-06-07 11:41:17.193 2623 ERROR neutron.agent.linux.utils [-] 
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-0239082e-0817-430f-a183-581cc995da28', 'ip', 'link', 'delete', 'qr-c3e98790-f6']
Exit code: 2
Stdin: 
Stdout: 
Stderr: RTNETLINK answers: Operation not supported

2015-06-07 11:41:17.592 2623 ERROR neutron.agent.linux.utils [-] 
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-0239082e-0817-430f-a183-581cc995da28', 'ip', 'link', 'delete', 'ha-1a34b88b-13']
Exit code: 2
Stdin: 
Stdout: 
Stderr: RTNETLINK answers: Operation not supported

2015-06-07 11:41:18.655 2623 ERROR neutron.agent.linux.utils [-] 
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-c3fb97a3-8547-4008-9360-daa940906da3', 'ip', 'link', 'delete', 'qr-ffdaf269-a2']
Exit code: 2
Stdin: 
Stdout: 
Stderr: RTNETLINK answers: Operation not supported

2015-06-07 11:41:19.052 2623 ERROR neutron.agent.linux.utils [-] 
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-c3fb97a3-8547-4008-9360-daa940906da3', 'ip', 'link', 'delete', 'ha-e4a43b4c-79']
Exit code: 2
Stdin: 
Stdout: 
Stderr: RTNETLINK answers: Operation not supported

2015-06-07 11:41:22.065 2623 ERROR neutron.agent.linux.utils [-] 
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-082e1275-c4d5-445b-a9c3-6bb0b7fe0b6a', 'ip', 'link', 'delete', 'qr-14f1c00c-6a']
Exit code: 2
Stdin: 
Stdout: 
Stderr: RTNETLINK answers: Operation not supported

2015-06-07 11:41:22.490 2623 ERROR neutron.agent.linux.utils [-] 
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-082e1275-c4d5-445b-a9c3-6bb0b7fe0b6a', 'ip', 'link', 'delete', 'qg-72ded7f8-ec']
Exit code: 2
Stdin: 
Stdout: 
Stderr: RTNETLINK answers: Operation not supported

2015-06-07 11:41:22.881 2623 ERROR neutron.agent.linux.utils [-] 
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-082e1275-c4d5-445b-a9c3-6bb0b7fe0b6a', 'ip', 'link', 'delete', 'ha-9630f5a6-73']
Exit code: 2
Stdin: 
Stdout: 
Stderr: RTNETLINK answers: Operation not supported

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1463800

Title:
  Confusing errors appears after running netns-cleanup with --force
  attribute

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  The setup: Controller, Compute and 2 Network nodes 
  KILO - VRRP on RHEL7.1

  Trying to delete all "alive" namespaces (alive - router with attached interface to the network)
  The command succeeded but  a lot of error messages appears.

   neutron-netns-cleanup --config-file=/etc/neutron/neutron.conf --config-file=/etc/neutron/dhcp_agent.ini --force
  2015-06-07 11:41:14.760 2623 INFO neutron.common.config [-] Logging enabled!
  2015-06-07 11:41:14.761 2623 INFO neutron.common.config [-] /usr/bin/neutron-netns-cleanup version 2015.1.0
  2015-06-07 11:41:16.777 2623 WARNING oslo_config.cfg [-] Option "use_namespaces" from group "DEFAULT" is deprecated for removal.  Its value may be silently ignored in the future.
  2015-06-07 11:41:17.193 2623 ERROR neutron.agent.linux.utils [-] 
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-0239082e-0817-430f-a183-581cc995da28', 'ip', 'link', 'delete', 'qr-c3e98790-f6']
  Exit code: 2
  Stdin: 
  Stdout: 
  Stderr: RTNETLINK answers: Operation not supported

  2015-06-07 11:41:17.592 2623 ERROR neutron.agent.linux.utils [-] 
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-0239082e-0817-430f-a183-581cc995da28', 'ip', 'link', 'delete', 'ha-1a34b88b-13']
  Exit code: 2
  Stdin: 
  Stdout: 
  Stderr: RTNETLINK answers: Operation not supported

  2015-06-07 11:41:18.655 2623 ERROR neutron.agent.linux.utils [-] 
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-c3fb97a3-8547-4008-9360-daa940906da3', 'ip', 'link', 'delete', 'qr-ffdaf269-a2']
  Exit code: 2
  Stdin: 
  Stdout: 
  Stderr: RTNETLINK answers: Operation not supported

  2015-06-07 11:41:19.052 2623 ERROR neutron.agent.linux.utils [-] 
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-c3fb97a3-8547-4008-9360-daa940906da3', 'ip', 'link', 'delete', 'ha-e4a43b4c-79']
  Exit code: 2
  Stdin: 
  Stdout: 
  Stderr: RTNETLINK answers: Operation not supported

  2015-06-07 11:41:22.065 2623 ERROR neutron.agent.linux.utils [-] 
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-082e1275-c4d5-445b-a9c3-6bb0b7fe0b6a', 'ip', 'link', 'delete', 'qr-14f1c00c-6a']
  Exit code: 2
  Stdin: 
  Stdout: 
  Stderr: RTNETLINK answers: Operation not supported

  2015-06-07 11:41:22.490 2623 ERROR neutron.agent.linux.utils [-] 
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-082e1275-c4d5-445b-a9c3-6bb0b7fe0b6a', 'ip', 'link', 'delete', 'qg-72ded7f8-ec']
  Exit code: 2
  Stdin: 
  Stdout: 
  Stderr: RTNETLINK answers: Operation not supported

  2015-06-07 11:41:22.881 2623 ERROR neutron.agent.linux.utils [-] 
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-082e1275-c4d5-445b-a9c3-6bb0b7fe0b6a', 'ip', 'link', 'delete', 'ha-9630f5a6-73']
  Exit code: 2
  Stdin: 
  Stdout: 
  Stderr: RTNETLINK answers: Operation not supported

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