From: Alexander Ebert <ebert@woltlab.com>
Date: Wed, 31 Dec 2014 12:47:46 +0000 (+0100)
Subject: Work-around for concurrent attempts to create a virtual session
X-Git-Tag: 2.1.0_Beta_3~46^2~7
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dbb0aa36eded0b10988ae1369e1807434b96ac0a;p=GitHub%2FWoltLab%2FWCF.git

Work-around for concurrent attempts to create a virtual session
---

diff --git a/wcfsetup/install/files/lib/system/session/SessionHandler.class.php b/wcfsetup/install/files/lib/system/session/SessionHandler.class.php
index c087d58bdd..aa3a292930 100644
--- a/wcfsetup/install/files/lib/system/session/SessionHandler.class.php
+++ b/wcfsetup/install/files/lib/system/session/SessionHandler.class.php
@@ -405,8 +405,18 @@ class SessionHandler extends SingletonFactory {
 			$this->virtualSession = null;
 			if ($this->user->userID && $this->supportsVirtualSessions) {
 				$virtualSessionAction = new SessionVirtualAction(array(), 'create', array('data' => array('sessionID' => $this->session->sessionID)));
-				$returnValues = $virtualSessionAction->executeAction();
-				$this->virtualSession = $returnValues['returnValues'];
+				
+				try {
+					$returnValues = $virtualSessionAction->executeAction();
+					$this->virtualSession = $returnValues['returnValues'];
+				}
+				catch (DatabaseException $e) {
+					// MySQL error 23000 = unique key
+					// do not check against the message itself, some weird systems localize them
+					if ($e->getCode() == 23000) {
+						$this->virtualSession = SessionVirtual::getExistingSession($this->session->sessionID);
+					}
+				}
 			}
 		}
 	}