Only attach hmrServer after successfully listen on port

Reviewed By: rafeca Differential Revision: D14006025 fbshipit-source-id: da650ba5482f02b12e1889dc7a6fadaf900019d0
facebook · Feb 11, 2019 · 0ca9b05 · 0ca9b05
1 parent 4e83f59
commit 0ca9b05
Showing 1 changed file with 3 additions and 4 deletions.
diff --git a/packages/metro/src/index.js b/packages/metro/src/index.js
@@ -158,13 +158,12 @@ exports.runServer = async (
     end();
   });
 
-  if (hmrEnabled) {
-    attachHmrServer(httpServer);
-  }
-
   return new Promise((resolve, reject) => {
     httpServer.listen(config.server.port, host, () => {
       onReady && onReady(httpServer);
+      if (hmrEnabled) {
+        attachHmrServer(httpServer);
+      }
       resolve(httpServer);
     });