drools-karaf-features (https://github.com/droolsjbpm/droolsjbpm-integration/blob/master/drools-osgi/drools-karaf-features/src/main/filtered-resources/repository/features.xml) use wrap protocol for bundles where it should not be needed (e.g. for other KIE artifacts which should already contain OSGi metadata). The file needs to be reviewed and all useless wraps have to be removed (they only make things more confusing).