The CXF bundles have OSGi activators that perform initialization stuff such as looking for CXF services in other bundles. However, in Equinox the bundle activators are not called unless one explicitly starts the bundles. The default strategy in Equinox is not to start bundles, unless the "Bundle-ActivationPolicy" is set to "lazy". Therefore this header should be added to all bundles so that CXF (esp. the client) is also usable inside an Eclipse application.