From d6ea20bfdab9e75658dbfe9eb9f0e8f7c5f19a70 Mon Sep 17 00:00:00 2001
From: NOXX - Commiter <artur1992123@mail.ru>
Date: Wed, 17 Jun 2026 23:26:10 +0300
Subject: [PATCH] fix(timers): unref background interval timers so they don't
 block clean shutdown (#4117)

Integrated into release/v3.8.28 (r8)
---
 open-sse/services/autoRefreshDaemon.ts | 2 ++
 src/lib/services/healthCheck.ts        | 2 ++
 src/server/ws/liveServer.ts            | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/open-sse/services/autoRefreshDaemon.ts b/open-sse/services/autoRefreshDaemon.ts
index 29c22a4a14..a08471f655 100644
--- a/open-sse/services/autoRefreshDaemon.ts
+++ b/open-sse/services/autoRefreshDaemon.ts
@@ -79,6 +79,8 @@ class AutoRefreshDaemon {
     this.timerId = setInterval(() => {
       this.check().catch(() => {});
     }, this.checkIntervalMs);
+    // Don't keep the process alive solely for this periodic daemon.
+    (this.timerId as { unref?: () => void })?.unref?.();
 
     console.log(
       `[AutoRefreshDaemon] Started — checking ${this.credentialStore.size} credentials every ${this.checkIntervalMs / 1000}s`
diff --git a/src/lib/services/healthCheck.ts b/src/lib/services/healthCheck.ts
index 98c6b83262..0a394df95d 100644
--- a/src/lib/services/healthCheck.ts
+++ b/src/lib/services/healthCheck.ts
@@ -25,6 +25,8 @@ export class HealthChecker {
     this.consecutiveFailures = 0;
     this.currentHealth = "unknown";
     this.timer = setInterval(() => void this.poll(), this.intervalMs);
+    // Don't keep the process alive solely for the health poller.
+    (this.timer as { unref?: () => void })?.unref?.();
   }
 
   stop(): void {
diff --git a/src/server/ws/liveServer.ts b/src/server/ws/liveServer.ts
index 9ff5ef6ba7..ccc1f7e8e9 100644
--- a/src/server/ws/liveServer.ts
+++ b/src/server/ws/liveServer.ts
@@ -440,6 +440,8 @@ function startHeartbeat(server: WebSocketServer): void {
       sendTo(client.ws, { type: "pong" } as WsServerMessage);
     }
   }, HEARTBEAT_INTERVAL_MS);
+  // Don't keep the process alive solely for the heartbeat (it is also cleared on close).
+  (interval as { unref?: () => void })?.unref?.();
 
   server.on("close", () => clearInterval(interval));
 }