feat(otelgin): enhance gin error tracking with span recording

CHANGELOG.md

@@ -13,6 +13,10 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Added support for providing `endpoint`, `pollingIntervalMs` and `initialSamplingRate` using environment variable `OTEL_TRACES_SAMPLER_ARG` in `go.opentelemetry.io/contrib/samples/jaegerremote`. (#6310)
 - Added support exporting logs via OTLP over gRPC in `go.opentelemetry.io/contrib/config`. (#6340)
 
+### Changed
+
+- feat(otelgin): enhance gin error tracking with span recording (#6346)
+
 ### Fixed
 
 - Fixed the value for configuring the OTLP exporter to use `grpc` instead of `grpc/protobuf` in `go.opentelemetry.io/contrib/config`. (#6338)

instrumentation/github.com/gin-gonic/gin/otelgin/gintrace.go

@@ -10,13 +10,14 @@ import (
 
 	"github.com/gin-gonic/gin"
 
-	"go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin/internal/semconvutil"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/codes"
 	"go.opentelemetry.io/otel/propagation"
 	semconv "go.opentelemetry.io/otel/semconv/v1.20.0"
 	oteltrace "go.opentelemetry.io/otel/trace"
+
+	"go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin/internal/semconvutil"
 )
 
 const (
@@ -96,6 +97,7 @@ func Middleware(service string, opts ...Option) gin.HandlerFunc {
 		}
 		if len(c.Errors) > 0 {
 			span.SetAttributes(attribute.String("gin.errors", c.Errors.String()))
+			span.RecordError(fmt.Errorf("gin errors: %s", c.Errors.String()))
 		}
 	}
 }