From dfa51220a53930d087e1be2613e0ae7ba21d3032 Mon Sep 17 00:00:00 2001
From: Timothy Mothra <tilee@microsoft.com>
Date: Fri, 9 Jul 2021 10:26:22 -0700
Subject: [PATCH] log to indicated Authentication Policy caught the response
 from ingestion (#2319)

---
 .../Implementation/TelemetryChannelEventSource.cs           | 6 ++++++
 .../TransmissionPolicy/AuthenticationTransmissionPolicy.cs  | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/BASE/src/ServerTelemetryChannel/Implementation/TelemetryChannelEventSource.cs b/BASE/src/ServerTelemetryChannel/Implementation/TelemetryChannelEventSource.cs
index 849c7558c3..4b78dd2b45 100644
--- a/BASE/src/ServerTelemetryChannel/Implementation/TelemetryChannelEventSource.cs
+++ b/BASE/src/ServerTelemetryChannel/Implementation/TelemetryChannelEventSource.cs
@@ -565,6 +565,12 @@ public void TransmissionFlushAsyncWarning(string exception, string appDomainName
             this.WriteEvent(77, exception ?? string.Empty, this.ApplicationName);
         }
 
+        [Event(78, Message = "AuthenticatedTransmissionError. Received a failed ingestion response. TransmissionId: {0}. Status Code: {1}. Status Description: {2}", Level = EventLevel.Warning)]
+        public void AuthenticationPolicyCaughtFailedIngestion(string transmissionId, string statusCode, string statusDescription, string appDomainName = "Incorrect")
+        {
+            this.WriteEvent(78, transmissionId ?? string.Empty, statusCode ?? string.Empty, statusDescription ?? string.Empty, this.ApplicationName);
+        }
+
         private static string GetApplicationName()
         {
             //// We want to add application name to all events BUT
diff --git a/BASE/src/ServerTelemetryChannel/Implementation/TransmissionPolicy/AuthenticationTransmissionPolicy.cs b/BASE/src/ServerTelemetryChannel/Implementation/TransmissionPolicy/AuthenticationTransmissionPolicy.cs
index 0dc78e8cf6..4444a32ee4 100644
--- a/BASE/src/ServerTelemetryChannel/Implementation/TransmissionPolicy/AuthenticationTransmissionPolicy.cs
+++ b/BASE/src/ServerTelemetryChannel/Implementation/TransmissionPolicy/AuthenticationTransmissionPolicy.cs
@@ -1,6 +1,7 @@
 namespace Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel.Implementation.TransmissionPolicy
 {
     using System;
+    using System.Globalization;
     using System.Threading.Tasks;
 
     using Microsoft.ApplicationInsights.Channel.Implementation;
@@ -65,6 +66,10 @@ private void HandleTransmissionSentEvent(object sender, TransmissionProcessedEve
                 {
                     case ResponseStatusCodes.Unauthorized:
                     case ResponseStatusCodes.Forbidden:
+                        TelemetryChannelEventSource.Log.AuthenticationPolicyCaughtFailedIngestion(
+                            transmissionId: e.Transmission.Id, 
+                            statusCode: e.Response.StatusCode.ToString(CultureInfo.InvariantCulture),
+                            statusDescription: e.Response.StatusDescription);
                         this.ApplyThrottlePolicy(e);
                         break;
                 }