From 86f25a5db07031635ff587006bfe974cb10eeba2 Mon Sep 17 00:00:00 2001
From: Bohdan Korablov <bkorablov@magento.com>
Date: Wed, 14 Mar 2018 15:14:37 +0200
Subject: [PATCH] MAGETWO-85983: [Backport for 2.1.x] Admin login always takes
 >30 sec when using Redis on 2.2.1 #12385

---
 .../Magento/Framework/Session/SessionManager.php    | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/lib/internal/Magento/Framework/Session/SessionManager.php b/lib/internal/Magento/Framework/Session/SessionManager.php
index 872cbc6d9358c..f39e757ed6dcf 100644
--- a/lib/internal/Magento/Framework/Session/SessionManager.php
+++ b/lib/internal/Magento/Framework/Session/SessionManager.php
@@ -503,18 +503,9 @@ public function regenerateId()
         if (headers_sent()) {
             return $this;
         }
-        //@see http://php.net/manual/en/function.session-regenerate-id.php#53480 workaround
+
         if ($this->isSessionExists()) {
-            $oldSessionId = session_id();
-            session_regenerate_id();
-            $newSessionId = session_id();
-            session_id($oldSessionId);
-            session_destroy();
-
-            $oldSession = $_SESSION;
-            session_id($newSessionId);
-            session_start();
-            $_SESSION = $oldSession;
+            session_regenerate_id(true);
         } else {
             session_start();
         }