Wicket session id not up to date due to Tomcat session fixation protection

While using a form based login with a security constraint in web.xml and killing the session on page start the value of 'WebSession.get().getId()' is not equal to '((ServletWebRequest) RequestCycle.get().getRequest()).getHttpServletRequest().getSession(false).getId()'.

This is due to Tomcat's session fixation protection in Tomat 7.0.

We implemented the following workaround:

new HttpSessionStore() {
public Session lookup(Request request) {
String sessionId = getSessionId(request, false);
LOG.debug("AbstractHttpSessionStore#lookup() [sessionId={}]", sessionId);
if (sessionId != null) {
WebRequest webRequest = toWebRequest(request);
Session session = (Session)getAttribute(webRequest, Session.SESSION_ATTRIBUTE_NAME);

// it cannot be okay if the session id's are not equal!!!
if (null != session && !sessionId.equals(session.getId())) {
try

{ Field f = Session.class.getDeclaredField("id"); f.setAccessible(true); f.set(session, null); // it will be resolved later from the httpSession }

catch (Exception e)

{ throw new IllegalStateException(e); }

}
return session;
}
return null;
}
}