this.started = false;
final Map<String, SessionPersistenceManager.PersistentSession> objectData = new HashMap<>();
for (String sessionId : sessionManager.getTransientSessions()) {
Session session = sessionManager.getSession(sessionId);
if (session != null) {
final HttpSessionEvent event = new HttpSessionEvent(SecurityActions.forSession(session, servletContext, false));
final Map<String, Object> sessionData = new HashMap<>();
for (String attr : session.getAttributeNames()) {
final Object attribute = session.getAttribute(attr);
sessionData.put(attr, attribute);
if (attribute instanceof HttpSessionActivationListener) {