Yeah, I agree that pulling the client creation closer to use has a lot more
overhead, so let's go for Mark's suggestion.


On Tue, Mar 5, 2013 at 8:34 PM, Mark McClain <email address hidden>wrote:

> did you try importing the library with:
>
> import eventlet
> httplib2 = eventlet.import_patched('httplib2')
>
> If we connect inside each call, that will require a round trip to
> keystone each time.
>
> --
> You received this bug notification because you are a member of Netstack
> Core Developers, which is subscribed to quantum.
> https://bugs.launchpad.net/bugs/1148017
>
> Title:
>    [q-meta] QuantumClientException: Second simultaneous read on fileno
>   11 detected
>
> Status in OpenStack Quantum (virtual network service):
>   Confirmed
>
> 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
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/quantum/+bug/1148017/+subscriptions
>



-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dan Wendlandt
Nicira, Inc: www.nicira.com
twitter: danwendlandt
~~~~~~~~~~~~~~~~~~~~~~~~~~~