Comment 9 for bug 1103202

Same problem here... I'm installing Grizzly from Ubuntu PPA (grizzly-trunk-testing) and my nova-scheduler.log shows up:

2013-03-15 16:39:11.205 858 CRITICAL nova [-] No module named simple
2013-03-15 16:39:11.205 858 TRACE nova Traceback (most recent call last):
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/bin/nova-scheduler", line 54, in <module>
2013-03-15 16:39:11.205 858 TRACE nova topic=CONF.scheduler_topic)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 534, in create
2013-03-15 16:39:11.205 858 TRACE nova db_allowed=db_allowed)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 413, in __init__
2013-03-15 16:39:11.205 858 TRACE nova self.manager = manager_class(host=self.host, *args, **kwargs)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 65, in __init__
2013-03-15 16:39:11.205 858 TRACE nova self.driver = importutils.import_object(scheduler_driver)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/openstack/common/importutils.py", line 40, in import_object
2013-03-15 16:39:11.205 858 TRACE nova return import_class(import_str)(*args, **kwargs)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/openstack/common/importutils.py", line 30, in import_class
2013-03-15 16:39:11.205 858 TRACE nova __import__(mod_str)
2013-03-15 16:39:11.205 858 TRACE nova ImportError: No module named simple
2013-03-15 16:39:11.205 858 TRACE nova