From b413427a370a0ced901bf4a9e025508900285dea Mon Sep 17 00:00:00 2001
From: LouisLam <louislam@users.noreply.github.com>
Date: Tue, 10 Aug 2021 21:28:54 +0800
Subject: [PATCH] graceful shutdown when listen error

---
 server/server.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/server/server.js b/server/server.js
index 54bbfa4fb..9eeca3203 100644
--- a/server/server.js
+++ b/server/server.js
@@ -570,15 +570,19 @@ let indexHTML = fs.readFileSync("./dist/index.html").toString();
 
     });
 
-    console.log("Init")
-    server.listen(port, hostname, () => {
+    console.log("Init the server")
 
+    server.once("error", async (err) => {
+        console.error("Cannot listen: " + err.message);
+        await Database.close();
+    });
+
+    server.listen(port, hostname, () => {
         if (hostname) {
             console.log(`Listening on ${hostname}:${port}`);
         } else {
             console.log("Listening on ${port}");
         }
-
         startMonitors();
     });