From e426e6d744c3af237c312666ee644a6369cf10d7 Mon Sep 17 00:00:00 2001
From: Thomas Kaul <4159106+dtslvr@users.noreply.github.com>
Date: Thu, 23 Jul 2026 14:44:38 +0200
Subject: [PATCH] Add stack trace logging for MaxListenersExceededWarning

---
 apps/api/src/main.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/apps/api/src/main.ts b/apps/api/src/main.ts
index 77d571ea0b..b30a20323e 100644
--- a/apps/api/src/main.ts
+++ b/apps/api/src/main.ts
@@ -26,6 +26,15 @@ import { AppModule } from './app/app.module';
 import { environment } from './environments/environment';
 
 const logger = new Logger('Bootstrap');
+const processWarningLogger = new Logger('ProcessWarning');
+
+process.on('warning', ({ name, stack }) => {
+  if (name === 'MaxListenersExceededWarning') {
+    // Log the stack trace of MaxListenersExceededWarning occurrences to identify
+    // the event emitter and the call site which registers the listeners
+    processWarningLogger.warn(stack);
+  }
+});
 
 async function bootstrap() {
   // Respect HTTP_PROXY / HTTPS_PROXY / NO_PROXY for outbound HTTP requests