From e1a2b258afa2626e5045897af674f03312988c36 Mon Sep 17 00:00:00 2001
From: Mitsuhiro Tanda <mitsuhiro.tanda@gmail.com>
Date: Thu, 21 Mar 2019 09:52:26 +0900
Subject: [PATCH] deduplicate same value annotation

---
 public/app/plugins/datasource/prometheus/datasource.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/public/app/plugins/datasource/prometheus/datasource.ts b/public/app/plugins/datasource/prometheus/datasource.ts
index bde56431683..9f8a912e554 100644
--- a/public/app/plugins/datasource/prometheus/datasource.ts
+++ b/public/app/plugins/datasource/prometheus/datasource.ts
@@ -354,6 +354,7 @@ export class PrometheusDatasource implements DataSourceApi<PromQuery> {
           })
           .value();
 
+        const dupCheck = {};
         for (const value of series.values) {
           const valueIsTrue = value[1] === '1'; // e.g. ALERTS
           if (valueIsTrue || annotation.useValueForTime) {
@@ -365,6 +366,10 @@ export class PrometheusDatasource implements DataSourceApi<PromQuery> {
             };
 
             if (annotation.useValueForTime) {
+              if (dupCheck[value[1]]) {
+                continue;
+              }
+              dupCheck[value[1]] = true;
               event['time'] = Math.floor(parseFloat(value[1]));
             } else {
               event['time'] = Math.floor(parseFloat(value[0])) * 1000;