diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
index dfd66516062c3..0825ee6ea9899 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
@@ -552,14 +552,16 @@ private function doAdvisoryLock($sessionId)
{
switch ($this->driver) {
case 'mysql':
+ // MySQL 5.7.5 and later enforces a maximum length on lock names of 64 characters. Previously, no limit was enforced.
+ $lockId = \substr($sessionId, 0, 64);
// should we handle the return value? 0 on timeout, null on error
// we use a timeout of 50 seconds which is also the default for innodb_lock_wait_timeout
$stmt = $this->pdo->prepare('SELECT GET_LOCK(:key, 50)');
- $stmt->bindValue(':key', $sessionId, \PDO::PARAM_STR);
+ $stmt->bindValue(':key', $lockId, \PDO::PARAM_STR);
$stmt->execute();
$releaseStmt = $this->pdo->prepare('DO RELEASE_LOCK(:key)');
- $releaseStmt->bindValue(':key', $sessionId, \PDO::PARAM_STR);
+ $releaseStmt->bindValue(':key', $lockId, \PDO::PARAM_STR);
return $releaseStmt;
case 'pgsql':
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