From a2f7bab1918bfe612dd34d878df4c75418ca9e5e Mon Sep 17 00:00:00 2001
From: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
Date: Tue, 3 May 2022 12:58:11 -0500
Subject: [PATCH] [APM] Services without application metrics display an error
 (#131347) (#131429)
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(cherry picked from commit ec152a6e9b5e6df26d4c48868506928fa1e13e40)

Co-authored-by: Cauê Marcondes <55978943+cauemarcondes@users.noreply.github.com>
---
 .../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 = {