From ab5c6990a55cbb11d97f857b4619b83fddda3d18 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Erik=20Pedersen?=
 <bjorn.erik.pedersen@gmail.com>
Date: Fri, 12 Nov 2021 09:28:27 +0100
Subject: [PATCH] commands: Fix missing file locking in server partial render

Fixes #9162
---
 commands/hugo.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/commands/hugo.go b/commands/hugo.go
index 4f011a33b..6be3776bc 100644
--- a/commands/hugo.go
+++ b/commands/hugo.go
@@ -765,7 +765,9 @@ func (c *commandeer) partialReRender(urls ...string) error {
 	for _, url := range urls {
 		visited[url] = true
 	}
-	return c.hugo().Build(hugolib.BuildCfg{NoBuildLock: true, RecentlyVisited: visited, PartialReRender: true, ErrRecovery: c.wasError})
+
+	// Note: We do not set NoBuildLock as the file lock is not acquired at this stage.
+	return c.hugo().Build(hugolib.BuildCfg{NoBuildLock: false, RecentlyVisited: visited, PartialReRender: true, ErrRecovery: c.wasError})
 }
 
 func (c *commandeer) fullRebuild(changeType string) {