When I try to start arbitrator with a config using a cloudfiles transporter, it complains:
self.logger.error("The Transporter module '%s' was found, but its Transporter class '%s' could not be found." % (module_name, classname))
It's because the cloudfiles transporter tries to import CloudFilesStorage from cumulus.storage, but that class does not exist. The file stops compiling, and so the TRANSPORTER_CLASS variable never gets defined and the arbitrator can't find it.