From f40499e550ae3ed7fea534b8c657c2c76d9f6070 Mon Sep 17 00:00:00 2001
From: Maxime Beauchemin <maximebeauchemin@gmail.com>
Date: Tue, 18 Apr 2017 13:29:54 -0700
Subject: [PATCH] [dashboard] improve error handling on dashboard (#2624)

* [dashboard] improve error handling on dashboard

* lint

* More wordy error msg
---
 superset/assets/javascripts/modules/superset.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/superset/assets/javascripts/modules/superset.js b/superset/assets/javascripts/modules/superset.js
index 434419e6fa..de808858b1 100644
--- a/superset/assets/javascripts/modules/superset.js
+++ b/superset/assets/javascripts/modules/superset.js
@@ -129,10 +129,13 @@ const px = function () {
         let msg = '';
         if (!xhr.responseText) {
           const status = xhr.status;
-          msg += 'An unknown error occurred. (Status: ' + status + ')';
           if (status === 0) {
             // This may happen when the worker in gunicorn times out
-            msg += ' Maybe the request timed out?';
+            msg += (
+              'The server could not be reached. You may want to ' +
+              'verify your connection and try again.');
+          } else {
+            msg += 'An unknown error occurred. (Status: ' + status + ')';
           }
         }
         return msg;
@@ -151,7 +154,9 @@ const px = function () {
         } catch (e) {
           // pass
         }
-        errHtml = `<div class="alert alert-danger">${errorMsg}</div>`;
+        if (errorMsg) {
+          errHtml += `<div class="alert alert-danger">${errorMsg}</div>`;
+        }
         if (xhr) {
           const extendedMsg = this.getErrorMsg(xhr);
           if (extendedMsg) {