[JENKINS-60454, 55070, 59992, 61192] Correct symptom of missing instance (#4525)

* [JENKINS-55070] Correct symptom of missing instance

* Apply Daniel's proposal
Co-authored-by: NDaniel Beck <1831569+daniel-beck@users.noreply.github.com>
(cherry picked from commit ae99586f)

core/src/main/java/hudson/security/TokenBasedRememberMeServices2.java

@@ -161,10 +161,15 @@ public class TokenBasedRememberMeServices2 extends TokenBasedRememberMeServices
 
     @Override
     public Authentication autoLogin(HttpServletRequest request, HttpServletResponse response) {
-        if(Jenkins.get().isDisableRememberMe()){
+        Jenkins j = Jenkins.getInstanceOrNull();
+        if (j == null) {
+            // as this filter could be called during restart, this corrects at least the symptoms
+            return null;
+        }
+        if (j.isDisableRememberMe()) {
             cancelCookie(request, response, null);
             return null;
-        }else {
+        } else {
             try {
                 // we use a patched version of the super.autoLogin
                 String rememberMeValue = findRememberMeCookieValue(request, response);