From ecb5dc8732e8d42d7f3eb4c2b9aa77d4b55a75b8 Mon Sep 17 00:00:00 2001
From: Mikel Blanchard <mblanchard@macrosssoftware.com>
Date: Mon, 13 Nov 2023 17:07:29 -0800
Subject: [PATCH] [sdk] Ignore event counters in SelfDiagnosticsEventListener
 (#5046)

---
 src/OpenTelemetry/Internal/SelfDiagnosticsEventListener.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/OpenTelemetry/Internal/SelfDiagnosticsEventListener.cs b/src/OpenTelemetry/Internal/SelfDiagnosticsEventListener.cs
index d6cd664b686..ea7d8dc91c8 100644
--- a/src/OpenTelemetry/Internal/SelfDiagnosticsEventListener.cs
+++ b/src/OpenTelemetry/Internal/SelfDiagnosticsEventListener.cs
@@ -318,7 +318,12 @@ protected override void OnEventSourceCreated(EventSource eventSource)
     /// <param name="eventData">Data of the EventSource event.</param>
     protected override void OnEventWritten(EventWrittenEventArgs eventData)
     {
-        this.WriteEvent(eventData.Message, eventData.Payload);
+        // Note: The EventSource check here works around a bug in EventListener.
+        // See: https://github.com/open-telemetry/opentelemetry-dotnet/pull/5046
+        if (eventData.EventSource.Name.StartsWith(EventSourceNamePrefix, StringComparison.OrdinalIgnoreCase))
+        {
+            this.WriteEvent(eventData.Message, eventData.Payload);
+        }
     }
 
     private void Dispose(bool disposing)