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[Bug 1302838] [NEW] newly spawned agent isn't learned by neutron very quickly

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Public bug reported:

2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp Traceback (most recent call last):
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/openstack/common/rpc/amqp.py", line 438, in _process_data
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     **args)
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/common/rpc.py", line 45, in dispatch
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     neutron_ctxt, version, method, namespace, **kwargs)
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/openstack/common/rpc/dispatcher.py", line 172, in dispatch
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     result = getattr(proxyobj, method)(ctxt, **kwargs)
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/dhcp_rpc_base.py", line 65, in get_active_networks_info
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     networks = self._get_active_networks(context, **kwargs)
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/dhcp_rpc_base.py", line 45, in _get_active_networks
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     context, host)
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/agentschedulers_db.py", line 179, in list_active_networks_on_active_dhcp_agent
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     context, constants.AGENT_TYPE_DHCP, host)
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/agents_db.py", line 133, in _get_agent_by_type_and_host
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     host=host)
2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp AgentNotFoundByTypeHost: Agent with agent_type=DHCP agent and host=arosen-desktop could not be found


Eventually the agent will be learned by neutron-server and this will go away.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1302838

Title:
  newly spawned agent isn't learned by neutron very quickly

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp Traceback (most recent call last):
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/openstack/common/rpc/amqp.py", line 438, in _process_data
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     **args)
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/common/rpc.py", line 45, in dispatch
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     neutron_ctxt, version, method, namespace, **kwargs)
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/openstack/common/rpc/dispatcher.py", line 172, in dispatch
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     result = getattr(proxyobj, method)(ctxt, **kwargs)
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/dhcp_rpc_base.py", line 65, in get_active_networks_info
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     networks = self._get_active_networks(context, **kwargs)
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/dhcp_rpc_base.py", line 45, in _get_active_networks
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     context, host)
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/agentschedulers_db.py", line 179, in list_active_networks_on_active_dhcp_agent
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     context, constants.AGENT_TYPE_DHCP, host)
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp   File "/opt/stack/neutron/neutron/db/agents_db.py", line 133, in _get_agent_by_type_and_host
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp     host=host)
  2014-04-04 13:37:34.168 TRACE neutron.openstack.common.rpc.amqp AgentNotFoundByTypeHost: Agent with agent_type=DHCP agent and host=arosen-desktop could not be found

  
  Eventually the agent will be learned by neutron-server and this will go away.

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