From b580fd6471287de4a7c77b0aa5b889464319b079 Mon Sep 17 00:00:00 2001
From: Manuel Schiller <manuel.schiller@caligano.de>
Date: Tue, 30 Dec 2025 13:47:00 +0100
Subject: [PATCH 1/2] fix: Kill prerendering child process when the vite
 preview server closes

---
 src/build/vite/preview.ts | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/build/vite/preview.ts b/src/build/vite/preview.ts
index 0e9f95970a..a3bfb18401 100644
--- a/src/build/vite/preview.ts
+++ b/src/build/vite/preview.ts
@@ -79,15 +79,25 @@ export function nitroPreviewPlugin(ctx: NitroPluginContext): VitePlugin {
           PORT: String(randomPort),
         },
       });
+
+      const killChild = (signal: NodeJS.Signals = "SIGTERM") => {
+        if (child && !child.killed) {
+          child.kill(signal);
+        }
+      };
+
       for (const sig of ["SIGINT", "SIGHUP"] as const) {
         process.once(sig, () => {
           consola.info(`Stopping preview server...`);
-          if (child.killed === false) {
-            child.kill(sig);
-            process.exit();
-          }
+          killChild(sig);
+          process.exit();
         });
       }
+
+      server.httpServer.on("close", () => {
+        killChild();
+      });
+
       child.on("exit", (code) => {
         if (code && code !== 0) {
           consola.error(`[nitro] Preview server exited with code ${code}`);

From feb83c49de04561b538847a7f3a14699dea36051 Mon Sep 17 00:00:00 2001
From: Pooya Parsa <pooya@pi0.io>
Date: Tue, 30 Dec 2025 13:52:08 +0100
Subject: [PATCH 2/2] use once

---
 src/build/vite/preview.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/build/vite/preview.ts b/src/build/vite/preview.ts
index a3bfb18401..9dd5c4ebc1 100644
--- a/src/build/vite/preview.ts
+++ b/src/build/vite/preview.ts
@@ -80,7 +80,7 @@ export function nitroPreviewPlugin(ctx: NitroPluginContext): VitePlugin {
         },
       });
 
-      const killChild = (signal: NodeJS.Signals = "SIGTERM") => {
+      const killChild = (signal: NodeJS.Signals) => {
         if (child && !child.killed) {
           child.kill(signal);
         }
@@ -94,11 +94,11 @@ export function nitroPreviewPlugin(ctx: NitroPluginContext): VitePlugin {
         });
       }
 
-      server.httpServer.on("close", () => {
-        killChild();
+      server.httpServer.once("close", () => {
+        killChild("SIGTERM");
       });
 
-      child.on("exit", (code) => {
+      child.once("exit", (code) => {
         if (code && code !== 0) {
           consola.error(`[nitro] Preview server exited with code ${code}`);
         }