From 7b9fb1b5e1932a3aa0a76300f60b96ba58970541 Mon Sep 17 00:00:00 2001
From: Phillip Burch <phillip.burch@live.com>
Date: Wed, 15 Apr 2020 13:03:39 -0500
Subject: [PATCH] Because onThreshold is changed even when it hasn't changed
 add a check (#63555) (#63567)

* Because onThreshold is changed even when it hasn't changed add a check

* Fix join

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
---
 .../infra/public/components/alerting/metrics/expression.tsx   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/x-pack/plugins/infra/public/components/alerting/metrics/expression.tsx b/x-pack/plugins/infra/public/components/alerting/metrics/expression.tsx
index 6cf4e5bed2e6f9..7de52840777f9c 100644
--- a/x-pack/plugins/infra/public/components/alerting/metrics/expression.tsx
+++ b/x-pack/plugins/infra/public/components/alerting/metrics/expression.tsx
@@ -399,7 +399,9 @@ export const ExpressionRow: React.FC<ExpressionRowProps> = props => {
 
   const updateThreshold = useCallback(
     t => {
-      setAlertParams(expressionId, { ...expression, threshold: t });
+      if (t.join() !== expression.threshold.join()) {
+        setAlertParams(expressionId, { ...expression, threshold: t });
+      }
     },
     [expressionId, expression, setAlertParams]
   );