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[Bob Ball <1531837@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

ryu 3.29 explicitly prevents compatability with oslo.config 3.2 to preserve python 2.6 compatability for ryu:
https://github.com/osrg/ryu/commit/1ed92b25b5997f804dd70a4f072fd20f6af618e0

Global-requirements now requires oslo.config 3.2:
https://github.com/openstack/requirements/blob/master/global-requirements.txt

Citrix's internal Neutron CI shows the breakage when ryu 3.29 is used (latest known good version was 3.26):
2016-01-07 07:34:56.673 ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent Exit code: 1; Stdin: ; Stdout: ; Stderr: Traceback (most recent call last):
  File "/usr/local/bin/neutron-rootwrap-xen-dom0", line 4, in <module>
    __import__('pkg_resources').require('neutron==8.0.0.0b2.dev265')
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3138, in <module>
    @_call_aside
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3124, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3151, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 663, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 676, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 854, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (oslo.config 3.2.0 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('oslo.config<=3.0.0,>=1.6.0'), set(['ryu']))
 Agent terminated!

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1531837

Title:
  ryu 3.29 incompatible with oslo.config

Status in neutron:
  New

Bug description:
  ryu 3.29 explicitly prevents compatability with oslo.config 3.2 to preserve python 2.6 compatability for ryu:
  https://github.com/osrg/ryu/commit/1ed92b25b5997f804dd70a4f072fd20f6af618e0

  Global-requirements now requires oslo.config 3.2:
  https://github.com/openstack/requirements/blob/master/global-requirements.txt

  Citrix's internal Neutron CI shows the breakage when ryu 3.29 is used (latest known good version was 3.26):
  2016-01-07 07:34:56.673 ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent Exit code: 1; Stdin: ; Stdout: ; Stderr: Traceback (most recent call last):
    File "/usr/local/bin/neutron-rootwrap-xen-dom0", line 4, in <module>
      __import__('pkg_resources').require('neutron==8.0.0.0b2.dev265')
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3138, in <module>
      @_call_aside
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3124, in _call_aside
      f(*args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3151, in _initialize_master_working_set
      working_set = WorkingSet._build_master()
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 663, in _build_master
      return cls._build_from_requirements(__requires__)
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 676, in _build_from_requirements
      dists = ws.resolve(reqs, Environment())
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 854, in resolve
      raise VersionConflict(dist, req).with_context(dependent_req)
  pkg_resources.ContextualVersionConflict: (oslo.config 3.2.0 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('oslo.config<=3.0.0,>=1.6.0'), set(['ryu']))
   Agent terminated!

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