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

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

** Changed in: neutron
    Milestone: None => liberty-1

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https://bugs.launchpad.net/bugs/1456822

Title:
  AgentNotFoundByTypeHost exception logged when L3-agent starts up

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  On my single-node devstack setup running the latest neutron code,
  there is one AgentNotFoundByTypeHost exception found for the L3-agent.
  However, the AgentNotFoundByTypeHost exception is not logged for the
  DHCP, OVS, or metadata agents.  This fact would point to a problem
  with how the L3-agent is starting up.

  Exception found in the L3-agent log:

  2015-05-19 11:27:57.490 23948 DEBUG oslo_messaging._drivers.amqpdriver [-] MSG_ID is 1d0f3e0a8a6744c9a9fc43eb3fdc5153 _send /usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py:311^M
  2015-05-19 11:27:57.550 23948 ERROR neutron.agent.l3.agent [-] Failed synchronizing routers due to RPC error^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent Traceback (most recent call last):^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent   File "/opt/stack/neutron/neutron/agent/l3/agent.py", line 517, in fetch_and_sync_all_routers^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent     routers = self.plugin_rpc.get_routers(context)^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent   File "/opt/stack/neutron/neutron/agent/l3/agent.py", line 91, in get_routers^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent     router_ids=router_ids)^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 156, in call^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent     retry=self.retry)^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 90, in _send^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent     timeout=timeout, retry=retry)^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 350, in send^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent     retry=retry)^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 341, in _send^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent     raise result^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent RemoteError: Remote error: AgentNotFoundByTypeHost Agent with agent_type=L3 agent and host=DVR-Ctrl2 could not be found^M
  2015-05-19 11:27:57.550 23948 TRACE neutron.agent.l3.agent [u'Traceback (most recent call last):\n', u'  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply\n    executor_callback))\n', u'  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 186, in _dispatch\n    executor_callback)\n', u'  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 130, in _do_dispatch\n    result = func(ctxt, **new_args)\n', u'  File "/opt/stack/neutron/neutron/api/rpc/handlers/l3_rpc.py", line 81, in sync_routers\n    context, host, router_ids))\n', u'  File "/opt/stack/neutron/neutron/db/l3_agentschedulers_db.py", line 290, in list_active_sync_routers_on_active_l3_agent\n    context, constants.AGENT_TYPE_L3, host)\n', u'  File "/opt/stack/neutron/neutron/db/agents_db.py", line 197, in _get_agent_by_type_and_host\n    host=host)\n', u'AgentNotFoundByTypeHost: Agent with agent_type=L3 agent and host=DVR-Ctrl2 could not be found\n'].^M

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