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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => kilo-2

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https://bugs.launchpad.net/bugs/1408326

Title:
  Server booted to a server group stucks in scheduling state if the
  policy filter is not configured

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  To reproduce the problem:

  Remove ServerGroupAntiAffinity from scheduler_default_filters in
  nova.conf

  $ nova server-group-create my-anti-affinity anti-affinity
  $ nova boot --flavor 42 --image 1b0ef685-2a7a-4c11-8e2d-a549215c1b3a --hint group=<uuid of the group created above> vm23

  The following exception is visible in the conductor log:
  2015-01-07 15:33:44.988 ERROR nova.scheduler.utils [req-675e5f28-59c4-4406-952c-182202aae805 admin admin] ServerGroupAntiAffinityFilter not configured
  2015-01-07 15:33:44.988 ERROR oslo.messaging.rpc.dispatcher [req-675e5f28-59c4-4406-952c-182202aae805 admin admin] Exception during message handling: No valid host was found. ServerGroupAntiAffinityFilter not configured
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last):
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher   File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 137, in _dispatch_and_reply
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher     incoming.message))
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher   File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 180, in _dispatch
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher   File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 126, in _do_dispatch
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher     result = getattr(endpoint, method)(ctxt, **new_args)
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher   File "/opt/stack/nova/nova/conductor/manager.py", line 626, in build_instances
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher     filter_properties)
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher   File "/opt/stack/nova/nova/scheduler/utils.py", line 311, in setup_instance_group
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher     group_info = _get_group_details(context, instance_uuid, group_hosts)
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher   File "/opt/stack/nova/nova/scheduler/utils.py", line 291, in _get_group_details
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher     raise exception.NoValidHost(reason=msg)
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher NoValidHost: No valid host was found. ServerGroupAntiAffinityFilter not configured
  2015-01-07 15:33:44.988 TRACE oslo.messaging.rpc.dispatcher 

  But the server stuck in scheduling state for ever. 
  $ nova list
  +--------------------------------------+------+--------+------------+-------------+--------------------+
  | ID                                   | Name | Status | Task State | Power State | Networks           |
  +--------------------------------------+------+--------+------------+-------------+--------------------+
  | 4b919b5c-1db4-4705-a608-8ce8db862b07 | vm23 | BUILD  | scheduling | NOSTATE     |                    |
  +--------------------------------------+------+--------+------------+-------------+--------------------+

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