From 0de2aad269e4a27669aaada0f71ae20f5209c426 Mon Sep 17 00:00:00 2001
From: Michael Lumish <mlumish@google.com>
Date: Thu, 10 Nov 2022 10:54:19 -0800
Subject: [PATCH] grpc-js: Fix reuse of channel filter stack factory

---
 packages/grpc-js/src/filter-stack.ts     | 4 ++++
 packages/grpc-js/src/internal-channel.ts | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/grpc-js/src/filter-stack.ts b/packages/grpc-js/src/filter-stack.ts
index f44c4383..622f3dd0 100644
--- a/packages/grpc-js/src/filter-stack.ts
+++ b/packages/grpc-js/src/filter-stack.ts
@@ -88,6 +88,10 @@ export class FilterStackFactory implements FilterFactory<FilterStack> {
     this.factories.unshift(...filterFactories);
   }
 
+  clone(): FilterStackFactory {
+    return new FilterStackFactory(this.factories);
+  }
+
   createFilter(): FilterStack {
     return new FilterStack(
       this.factories.map((factory) => factory.createFilter())
diff --git a/packages/grpc-js/src/internal-channel.ts b/packages/grpc-js/src/internal-channel.ts
index 16f4b983..a8c6dc96 100644
--- a/packages/grpc-js/src/internal-channel.ts
+++ b/packages/grpc-js/src/internal-channel.ts
@@ -439,7 +439,7 @@ export class InternalChannel {
       parentCall: parentCall,
     };
 
-    const call = new ResolvingCall(this, method, finalOptions, this.filterStackFactory, this.credentials._getCallCredentials(), getNextCallNumber());
+    const call = new ResolvingCall(this, method, finalOptions, this.filterStackFactory.clone(), this.credentials._getCallCredentials(), getNextCallNumber());
 
     if (this.channelzEnabled) {
       this.callTracker.addCallStarted();