From db65d566e651c96cdba909f22e28bbf7be312778 Mon Sep 17 00:00:00 2001
From: Michael Lumish <mlumish@google.com>
Date: Tue, 26 Apr 2022 10:09:22 -0700
Subject: [PATCH] grpc-js: Fix mean calculation in outlier detection LB policy

---
 packages/grpc-js/src/load-balancer-outlier-detection.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/grpc-js/src/load-balancer-outlier-detection.ts b/packages/grpc-js/src/load-balancer-outlier-detection.ts
index 3bd06211..2c231c40 100644
--- a/packages/grpc-js/src/load-balancer-outlier-detection.ts
+++ b/packages/grpc-js/src/load-balancer-outlier-detection.ts
@@ -429,7 +429,7 @@ export class OutlierDetectionLoadBalancer implements LoadBalancer {
     }
 
     // Step 2
-    const successRateMean = successRates.reduce((a, b) => a + b);
+    const successRateMean = successRates.reduce((a, b) => a + b) / successRates.length;
     let successRateVariance = 0;
     for (const rate of successRates) {
       const deviation = rate - successRateMean;