public void sessionAdded(long sessionId) {
        if (hasStatusDeleted(sessionId)) return;

        log.log(Level.FINE, () -> "Adding remote session " + sessionId);
        Session session = createRemoteSession(sessionId);
        if (session.getStatus() == NEW) {
            log.log(Level.FINE, () -> session.logPre() + "Confirming upload for session " + sessionId);
            confirmUpload(session);
        }
        createLocalSessionFromDistributedApplicationPackage(sessionId);
    }
A session for which we don't have a watcher, i.e. hitherto unknown to us.

@param sessionId session id for the new session
configserver/src/main/java/com/yahoo/vespa/config/server/session/SessionRepository.java