From 31c1fc3e6e2bc5c9b3b42c117e6997dc063fa6be Mon Sep 17 00:00:00 2001
From: Ivana Huckova <30407135+ivanahuckova@users.noreply.github.com>
Date: Mon, 17 May 2021 17:48:04 +0200
Subject: [PATCH] Explore: Fix Cannot read property 'emit' of null error
 (#34114)

* Use state.eventBridge for errors only if angular editor (some SQL data sources are still listening on this)

* Update public/app/features/explore/state/query.ts

* Update public/app/features/explore/state/query.ts
---
 public/app/features/explore/state/query.ts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/public/app/features/explore/state/query.ts b/public/app/features/explore/state/query.ts
index c7a38911f17..13ca14bd7a5 100644
--- a/public/app/features/explore/state/query.ts
+++ b/public/app/features/explore/state/query.ts
@@ -660,8 +660,10 @@ export const processQueryResponse = (
       return state;
     }
 
-    // For Angular editors
-    state.eventBridge.emit(PanelEvents.dataError, error);
+    // Send error to Angular editors
+    if (state.datasourceInstance?.components?.QueryCtrl) {
+      state.eventBridge.emit(PanelEvents.dataError, error);
+    }
   }
 
   if (!request) {
@@ -673,7 +675,6 @@ export const processQueryResponse = (
   // Send legacy data to Angular editors
   if (state.datasourceInstance?.components?.QueryCtrl) {
     const legacy = series.map((v) => toLegacyResponseData(v));
-
     state.eventBridge.emit(PanelEvents.dataReceived, legacy);
   }