From d207fab298fd730e67751431337dc6cf0516d127 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8F=B2=E8=BF=AA=E4=BB=94?= <gaobinzhan@gmail.com>
Date: Wed, 23 Mar 2022 15:31:49 +0800
Subject: [PATCH] Fixed bug that the file name should be an empty string by
 default for `Hyperf\Memory\LockManager`.

---
 CHANGELOG-2.2.md               | 4 ++++
 src/memory/src/LockManager.php | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG-2.2.md b/CHANGELOG-2.2.md
index 4ebab67f9..012434763 100644
--- a/CHANGELOG-2.2.md
+++ b/CHANGELOG-2.2.md
@@ -1,5 +1,9 @@
 # v2.2.29 - TBD
 
+## Fixed
+
+- [#4620](https://github.com/hyperf/hyperf/pull/4620) Fixed bug that the file name should be an empty string by default for `Hyperf\Memory\LockManager`.
+
 # v2.2.28 - 2022-03-14
 
 ## Fixed
diff --git a/src/memory/src/LockManager.php b/src/memory/src/LockManager.php
index b5e36413d..420c83366 100644
--- a/src/memory/src/LockManager.php
+++ b/src/memory/src/LockManager.php
@@ -25,7 +25,7 @@ class LockManager
     /**
      * You should initialize a Lock with the identifier before use it.
      */
-    public static function initialize(string $identifier, int $type = SWOOLE_RWLOCK, string $filename = null): void
+    public static function initialize(string $identifier, int $type = SWOOLE_RWLOCK, string $filename = ''): void
     {
         static::$container[$identifier] = new Lock($type, $filename);
     }