From 6298d3d7cd1d419e5df7d60895d6982256469bc3 Mon Sep 17 00:00:00 2001
From: Alexander Velikiy <39257464+VargBurz@users.noreply.github.com>
Date: Fri, 28 Feb 2020 12:10:45 +0300
Subject: [PATCH] TypeError: Cannot read property 'isUp' of undefined #398
 (#416)

---
 src/panel/graph_panel/graph_ctrl.ts | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/panel/graph_panel/graph_ctrl.ts b/src/panel/graph_panel/graph_ctrl.ts
index 2536750..95fd7cd 100644
--- a/src/panel/graph_panel/graph_ctrl.ts
+++ b/src/panel/graph_panel/graph_ctrl.ts
@@ -338,11 +338,21 @@ class GraphCtrl extends MetricsPanelCtrl {
       this._analyticUnitsToShow
     );
 
-    if(this.analyticService.isUp) {
-      await this.analyticsController.init();
+    if(this.analyticService === undefined) {
+      appEvents.emit(
+        'alert-error',
+        [
+          'Select Hastic datasource',
+          'Panel config -> Visualization'
+        ]
+      );
+    } else {
+      if(this.analyticService.isUp) {
+        await this.analyticsController.init();
 
-      this._updatePanelInfo();
-      this.analyticsController.updateServerInfo();
+        this._updatePanelInfo();
+        this.analyticsController.updateServerInfo();
+      }
     }
 
     this._graphRenderer = new GraphRenderer(