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

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

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https://bugs.launchpad.net/bugs/1148017

Title:
   [q-meta] QuantumClientException: Second simultaneous read on fileno
  11 detected

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

Bug description:
  When I run quantum + nova in 5 host machine and launch 100 VMs.
  I got following exception on the quantum-metadata server.
  I'm still not sure the cause, yet

  X-Quantum-Router-Id: 2617637b-a3f9-4d0f-8fc5-458bbbfb5d0e __call__ /opt/stack/quantum/quantum/agent/metadata/agent.py:81
  2013-03-05 15:28:51.465 5974 ERROR quantum.agent.metadata.agent [-] Unexpected error.
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent Traceback (most recent call last):
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/opt/stack/quantum/quantum/agent/metadata/agent.py", line 83, in __call__
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     instance_id = self._get_instance_id(req)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/opt/stack/quantum/quantum/agent/metadata/agent.py", line 111, in _get_instance_id
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     fixed_ips=['ip_address=%s' % remote_address])['ports']
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/usr/local/lib/python2.7/dist-packages/quantumclient/v2_0/client.py", line 106, in with_params
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     ret = self.function(instance, *args, **kwargs)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/usr/local/lib/python2.7/dist-packages/quantumclient/v2_0/client.py", line 249, in list_ports
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     return self.get(self.ports_path, params=_params)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/usr/local/lib/python2.7/dist-packages/quantumclient/v2_0/client.py", line 901, in get
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     headers=headers, params=params)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/usr/local/lib/python2.7/dist-packages/quantumclient/v2_0/client.py", line 886, in retry_request
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     headers=headers, params=params)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/usr/local/lib/python2.7/dist-packages/quantumclient/v2_0/client.py", line 831, in do_request
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     self._handle_fault_response(status_code, replybody)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/usr/local/lib/python2.7/dist-packages/quantumclient/v2_0/client.py", line 812, in _handle_fault_response
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     exception_handler_v20(status_code, des_error_body)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent   File "/usr/local/lib/python2.7/dist-packages/quantumclient/v2_0/client.py", line 86, in exception_handler_v20
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent     message=message)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent QuantumClientException: Second simultaneous read on fileno 11 detected.  Unless you really know what you're doing, make sure that only one greenthread can read any particular socket.  Consider using a pools.Pool. If you do know what you're doing and want to disable this error, call eventlet.debug.hub_multiple_reader_prevention(False)
  2013-03-05 15:28:51.465 5974 TRACE quantum.agent.metadata.agent 
  2013-03-05 15:28:51.481 5974 DEBUG quantum.agent.metadata.agent [-] Request: GET /2009-04-04/meta-data/block-device-mapping/Internal HTTP/1.0

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