From b6794b614b701ff1bfde98de5b4fa8735f5155b0 Mon Sep 17 00:00:00 2001
From: MeiMei <30769358+mei23@users.noreply.github.com>
Date: Thu, 19 May 2022 11:49:07 +0900
Subject: enhance: Perform port diagnosis at startup only when Listen fails
 (#8698)

* Change port check

* Comment: disableClustering

* CHANGELOG

* Smart message
---
 packages/backend/src/server/index.ts | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'packages/backend/src/server')

diff --git a/packages/backend/src/server/index.ts b/packages/backend/src/server/index.ts
index c1a2a6dfff..cd061da725 100644
--- a/packages/backend/src/server/index.ts
+++ b/packages/backend/src/server/index.ts
@@ -2,6 +2,7 @@
  * Core Server
  */
 
+import cluster from 'node:cluster';
 import * as fs from 'node:fs';
 import * as http from 'node:http';
 import Koa from 'koa';
@@ -142,5 +143,26 @@ export default () => new Promise(resolve => {
 
 	initializeStreamingServer(server);
 
+	server.on('error', e => {
+		switch ((e as any).code) {
+			case 'EACCES':
+				serverLogger.error(`You do not have permission to listen on port ${config.port}.`);
+				break;
+			case 'EADDRINUSE':
+				serverLogger.error(`Port ${config.port} is already in use by another process.`);
+				break;
+			default:
+				serverLogger.error(e);
+				break;
+		}
+
+		if (cluster.isWorker) {
+			process.send!('listenFailed');
+		} else {
+			// disableClustering
+			process.exit(1);
+		}
+	});
+
 	server.listen(config.port, resolve);
 });
-- 
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