You have been subscribed to a public bug: Immediately after starting nova-compute service on the host, if concurrent instance creation operations are triggered on the same host, both the workflows try to define the static network filters and the latter one fails with 'nova-no-nd-reflection filter already exists'.
Log snippet: 2016-08-07 05:40:57.628 17601 ERROR nova.scheduler.utils [req-137df929-3b97-4437-b26d-3280dcbcd8e3 b5dc09cde3ac440d9060d6cc89f7ba71 87841dbf785d4ff3a43d5fd5c53ead50 - - -] [insta nce: b8d573aa-1aae-4dec-a275-ae8c82f4a274] Error from last host: dc5e6fb9-bcd1-4548-ad2e-4e571b783fe8 (node cinder-glance-centos7-10-4-252-239.platform9.sys): [u'Traceback (most recent call last):\n', u' File "/opt/pf9/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 2128, in _do_build_and_run_instance\n filter_properties)\n', u' File "/opt/pf9/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 2284, in _build_and_run_instance\n instance_uuid=instance.uuid, reason=six.text_type(e))\n', u"Resch eduledException: Build of instance b8d573aa-1aae-4dec-a275-ae8c82f4a274 was re-scheduled: operation failed: filter 'nova-no-nd-reflection' already exists with uuid 60ba4736-64c7- 42c3-8efe-e6919dec44d2\n"] 2016-08-07 05:40:57.865 17601 WARNING nova.scheduler.utils [req-137df929-3b97-4437-b26d-3280dcbcd8e3 b5dc09cde3ac440d9060d6cc89f7ba71 87841dbf785d4ff3a43d5fd5c53ead50 - - -] Fail ed to compute_task_build_instances: No valid host was found. Traceback (most recent call last): File "/opt/pf9/nova/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 150, in inner return func(*args, **kwargs) File "/opt/pf9/nova/lib/python2.7/site-packages/nova/scheduler/manager.py", line 84, in select_destinations filter_properties) File "/opt/pf9/nova/lib/python2.7/site-packages/nova/scheduler/filter_scheduler.py", line 96, in select_destinations raise exception.NoValidHost(reason=msg) NoValidHost: No valid host was found. ** Affects: nova Importance: Undecided Assignee: Pooja Ghumre (pooja-9) Status: New -- Concurrent nova instance creation fails with nova-no-nd-reflection filter already exists error https://bugs.launchpad.net/bugs/1632041 You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp