From 76a66a4add46e8ce27a216c9601f04037a0d1a49 Mon Sep 17 00:00:00 2001
From: Damien CORNEAU <corneadoug@gmail.com>
Date: Tue, 29 Mar 2016 17:02:24 +0900
Subject: [PATCH] Flush on first text append event

---
 .../src/app/notebook/paragraph/paragraph.controller.js    | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/zeppelin-web/src/app/notebook/paragraph/paragraph.controller.js b/zeppelin-web/src/app/notebook/paragraph/paragraph.controller.js
index 599ed901fa6..a5d2fe3e9d3 100644
--- a/zeppelin-web/src/app/notebook/paragraph/paragraph.controller.js
+++ b/zeppelin-web/src/app/notebook/paragraph/paragraph.controller.js
@@ -167,7 +167,7 @@ angular.module('zeppelinWebApp')
         angular.element('#p' + $scope.paragraph.id + '_text').bind('mousewheel', function(e) {
           $scope.keepScrollDown = false;
         });
-
+        $scope.flushStreamingOutput = true;
       } else {
         $timeout(retryRenderer, 10);
       }
@@ -445,13 +445,17 @@ angular.module('zeppelinWebApp')
 
   $scope.$on('appendParagraphOutput', function(event, data) {
     if ($scope.paragraph.id === data.paragraphId) {
+      if ($scope.flushStreamingOutput) {
+        $scope.clearTextOutput();
+        $scope.flushStreamingOutput = false;
+      }
       $scope.appendTextOutput(data.data);
     }
   });
 
   $scope.$on('updateParagraphOutput', function(event, data) {
     if ($scope.paragraph.id === data.paragraphId) {
-      $scope.clearTextOutput(data.data);
+      $scope.clearTextOutput();
       $scope.appendTextOutput(data.data);
     }
   });