From 34db1b6ad1c59abccb07fc17e8546bedece13a48 Mon Sep 17 00:00:00 2001
From: kdletters <kdletters@qq.com>
Date: Tue, 15 Sep 2026 23:27:37 +0800
Subject: [PATCH] =?UTF-8?q?=E9=81=BF=E5=85=8D=E6=B8=85=E7=90=86=E5=A4=B1?=
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使用原子重命名隔离失效锁文件
---
 scripts/database-backup-to-oss.mjs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/database-backup-to-oss.mjs b/scripts/database-backup-to-oss.mjs
index 4b9031410..bc215509f 100644
--- a/scripts/database-backup-to-oss.mjs
+++ b/scripts/database-backup-to-oss.mjs
@@ -502,8 +502,12 @@ function acquireBackupLock({ workDir, database }) {
     ) {
       throw new Error(`已有数据库备份进程持有锁: ${lockPath} pid=${ownerPid}`);
     }
+    const staleLockPath = `${lockPath}.stale-${process.pid}-${attempt}-${Date.now()}`;
     try {
-      rmSync(lockPath);
+      // rename 是原子的：若另一个进程已先清理并重新建锁，这里只会得到 ENOENT，
+      // 不会把新进程的锁误删。
+      renameSync(lockPath, staleLockPath);
+      rmSync(staleLockPath, { force: true });
       console.log(
         `[database-backup] 已清理失效数据库备份锁，准备重新获取: ${lockPath} pid=${ownerPid || '<invalid>'}`,
       );