feat: Include endpoint URI in connection failure events

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -5,6 +5,9 @@
 * Added configuration options for `MetricReaderType` to allow for configuring
   the `OtlpMetricExporter` to export either manually or periodically.
   ([#2674](https://github.com/open-telemetry/opentelemetry-dotnet/pull/2674))
+* The internal log message used when OTLP export client connection failure occurs,
+  will now include the endpoint uri as well.
+  ([#2686](https://github.com/open-telemetry/opentelemetry-dotnet/pull/2686))
 
 ## 1.2.0-beta2
 

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/BaseOtlpHttpExportClient.cs

@@ -55,7 +55,7 @@ public bool SendExportRequest(TRequest request, CancellationToken cancellationTo
             }
             catch (HttpRequestException ex)
             {
-                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(ex);
+                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(this.Options.Endpoint, ex);
 
                 return false;
             }

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/OtlpGrpcLogExportClient.cs

@@ -51,7 +51,7 @@ public override bool SendExportRequest(OtlpCollector.ExportLogsServiceRequest re
             }
             catch (RpcException ex)
             {
-                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(ex);
+                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(this.Options.Endpoint, ex);
 
                 return false;
             }

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/OtlpGrpcMetricsExportClient.cs

@@ -51,7 +51,7 @@ public override bool SendExportRequest(OtlpCollector.ExportMetricsServiceRequest
             }
             catch (RpcException ex)
             {
-                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(ex);
+                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(this.Options.Endpoint, ex);
 
                 return false;
             }

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/OtlpGrpcTraceExportClient.cs

@@ -51,7 +51,7 @@ public override bool SendExportRequest(OtlpCollector.ExportTraceServiceRequest r
             }
             catch (RpcException ex)
             {
-                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(ex);
+                OpenTelemetryProtocolExporterEventSource.Log.FailedToReachCollector(this.Options.Endpoint, ex);
 
                 return false;
             }

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/OpenTelemetryProtocolExporterEventSource.cs

@@ -26,11 +26,12 @@ internal class OpenTelemetryProtocolExporterEventSource : EventSource
         public static readonly OpenTelemetryProtocolExporterEventSource Log = new OpenTelemetryProtocolExporterEventSource();
 
         [NonEvent]
-        public void FailedToReachCollector(Exception ex)
+        public void FailedToReachCollector(Uri collectorUri, Exception ex)
         {
             if (Log.IsEnabled(EventLevel.Error, EventKeywords.All))
             {
-                this.FailedToReachCollector(ex.ToInvariantString());
+                var rawCollectorUri = collectorUri.ToString();
+                this.FailedToReachCollector(rawCollectorUri, ex.ToInvariantString());
             }
         }
 
@@ -43,10 +44,10 @@ public void ExportMethodException(Exception ex)
             }
         }
 
-        [Event(2, Message = "Exporter failed send data to collector. Data will not be sent. Exception: {0}", Level = EventLevel.Error)]
-        public void FailedToReachCollector(string ex)
+        [Event(2, Message = "Exporter failed send data to collector to {0} endpoint. Data will not be sent. Exception: {1}", Level = EventLevel.Error)]
+        public void FailedToReachCollector(string rawCollectorUri, string ex)
         {
-            this.WriteEvent(2, ex);
+            this.WriteEvent(2, rawCollectorUri, ex);
         }
 
         [Event(3, Message = "Could not translate activity from class '{0}' and method '{1}', span will not be recorded.", Level = EventLevel.Informational)]