I added "monitoring" to the dependency list of my component and I no longer get
an ImportError. Thanks Murphy!
- Dushyant
----- Original Message -----
From: "Murphy McCauley" <jam...@nau.edu>
To: "Dushyant Arora" <dushyantaror...@gmail.com>
Cc: "Dushyant Arora" <dushy...@cs.princeton.edu>, nox-dev@noxrepo.org
Sent: Friday, December 30, 2011 2:24:57 AM
Subject: Re: [nox-dev] Error on importing nox/netapps/monitoring.py
You should. If your component interacts with the monitoring component, you
should be running the monitoring component -- your component is dependent on
it.
The proper way to do this is to add "monitoring" to the list of dependencies in
your component's meta.json. As a shortcut, you can just specify monitoring on
the commandline along the lines of: ./nox_core monitoring NOXSwitch
Hope that helps.
-- Murphy
On Dec 29, 2011, at 11:18 PM, Dushyant Arora wrote:
No.
On Fri, Dec 30, 2011 at 2:16 AM, Murphy McCauley < jam...@nau.edu > wrote:
Are you also running the monitoring component, either on the commandline before
your component or by adding it as a dependency in your component's meta.json?
-- Murphy
On Dec 29, 2011, at 10:25 PM, Dushyant Arora wrote:
> Hello,
>
> I have created a NOX application NOXSwitch.py which calls
> send_flow_stats_request() from the module monitoring.py. However I get the
> following ImportError:
>
> 00001|nox|INFO:Starting nox_core
> (/home/openflow/noxcore/build/src/.libs/lt-nox_core)
> 00002|nox|ERR:Cannot change the state of 'NOXSwitch' to INSTALLED:
> 'NOXSwitch' ran into an error:
> cannot import a Python module 'nox.coreapps.examples.NOXSwitch':
> Traceback (most recent call last):
> File "./nox/coreapps/examples/NOXSwitch.py", line 37, in <module>
> from nox.netapps.monitoring.monitoring import Monitoring
> File "./nox/netapps/monitoring/monitoring.py", line 33, in <module>
> from nox.coreapps.messenger.pyjsonmsgevent import JSONMsg_event
> File "./nox/coreapps/messenger/pyjsonmsgevent.py", line 25, in <module>
> _pyjsonmsgevent = swig_import_helper()
> File "./nox/coreapps/messenger/pyjsonmsgevent.py", line 21, in
> swig_import_helper
> _mod = imp.load_module('_pyjsonmsgevent', fp, pathname, description)
> ImportError: ./nox/coreapps/messenger/_pyjsonmsgevent.so: undefined symbol:
> vigil::JSONMsg_event::JSONMsg_event(vigil::core_message const*)
>
> How do I correct this?
>
> I am trying to follow this earlier thread:
> http://noxrepo.org/pipermail/nox-dev/2011-November/008246.html
>
> Thanks,
>
> Dushyant
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