From 4f38f1e92fd08687802f0b59f244576b07eb1d3a Mon Sep 17 00:00:00 2001
From: Michael Lumish <mlumish@google.com>
Date: Fri, 29 May 2020 12:35:25 -0700
Subject: [PATCH] Deactivate targets that are not in new configs

---
 packages/grpc-js/src/load-balancer-weighted-target.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/grpc-js/src/load-balancer-weighted-target.ts b/packages/grpc-js/src/load-balancer-weighted-target.ts
index 03d0ec70..e9756e6a 100644
--- a/packages/grpc-js/src/load-balancer-weighted-target.ts
+++ b/packages/grpc-js/src/load-balancer-weighted-target.ts
@@ -299,6 +299,13 @@ export class WeightedTargetLoadBalancer implements LoadBalancer {
       target.updateAddressList(childAddressMap.get(targetName) ?? [], targetConfig, attributes);
     }
 
+    // Deactivate targets that are not in the new config
+    for (const [targetName, target] of this.targets) {
+      if (this.targetList.indexOf(targetName) < 0) {
+        target.deactivate();
+      }
+    }
+
     this.updateState();
   }
   exitIdle(): void {