From 587f9b329cb9a6d17c42cd4cc7bbb4d7a730e0c5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cau=C3=AA=20Marcondes?=
 <55978943+cauemarcondes@users.noreply.github.com>
Date: Tue, 3 May 2022 12:44:30 -0400
Subject: [PATCH] [APM] Services without application metrics display an error
 (#131347)

---
 .../routes/metrics/by_agent/shared/memory/index.ts   | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/x-pack/plugins/apm/server/routes/metrics/by_agent/shared/memory/index.ts b/x-pack/plugins/apm/server/routes/metrics/by_agent/shared/memory/index.ts
index d0e84211ef455..714ac5cdf38d1 100644
--- a/x-pack/plugins/apm/server/routes/metrics/by_agent/shared/memory/index.ts
+++ b/x-pack/plugins/apm/server/routes/metrics/by_agent/shared/memory/index.ts
@@ -44,8 +44,16 @@ const chartBase: ChartBase = {
 };
 
 export const percentSystemMemoryUsedScript = {
-  lang: 'expression',
-  source: `1 - doc['${METRIC_SYSTEM_FREE_MEMORY}'] / doc['${METRIC_SYSTEM_TOTAL_MEMORY}']`,
+  lang: 'painless',
+  source: `
+    if(doc.containsKey('${METRIC_SYSTEM_FREE_MEMORY}') && doc.containsKey('${METRIC_SYSTEM_TOTAL_MEMORY}')){
+      double freeMemoryValue =  doc['${METRIC_SYSTEM_FREE_MEMORY}'].value;
+      double totalMemoryValue = doc['${METRIC_SYSTEM_TOTAL_MEMORY}'].value;
+      return 1 - freeMemoryValue / totalMemoryValue
+    }
+    
+    return null;
+  `,
 } as const;
 
 export const percentCgroupMemoryUsedScript = {