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[Slawek Kaplonski <1717582@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In fullstack tests there is many times error with creating e.g. "host-xxxx" namespace. Error message tells that such namespace already exists and test is failing because of that.
It looks that this is kind of race condition when ip.netns.exists() method return false but few miliseconds later namespace already exists and ip.netns.add() method fails.
It is in method ensure_namespace() in https://github.com/openstack/neutron/blob/master/neutron/agent/linux/ip_lib.py#L204

** Affects: neutron
     Importance: Undecided
     Assignee: Slawek Kaplonski (slaweq)
         Status: In Progress


** Tags: fullstack

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https://bugs.launchpad.net/bugs/1717582

Title:
  fullstack job failing to create namespace because it's already exists

Status in neutron:
  In Progress

Bug description:
  In fullstack tests there is many times error with creating e.g. "host-xxxx" namespace. Error message tells that such namespace already exists and test is failing because of that.
  It looks that this is kind of race condition when ip.netns.exists() method return false but few miliseconds later namespace already exists and ip.netns.add() method fails.
  It is in method ensure_namespace() in https://github.com/openstack/neutron/blob/master/neutron/agent/linux/ip_lib.py#L204

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