Failed while installing JAX-RS (REST Web Services) 1.1. org.osgi.service.prefs.BackingStoreException: Resource '/.settings' does not exist.

https://issues.jboss.org/browse/JBIDE-10039?_sscc=t

https://stackoverflow.com/questions/16836832/failed-while-installing-jax-rs-rest-web-services-1-1-java-lang-nullpointerexc

https://stackoverflow.com/questions/25509493/maven-package-structure-changed-after-build-eclipse