tracker/udp/server/server.go | 10 +++++++++-

diff --git a/tracker/udp/server/server.go b/tracker/udp/server/server.go
index 6f0fb438e28a2e85e939d786edf224fffebcd776..5666e8052be0e0d8b37962dafd094205211fdd20 100644
--- a/tracker/udp/server/server.go
+++ b/tracker/udp/server/server.go
@@ -210,19 +210,27 @@ 	// Limit concurrent handled requests.
 	sem := make(chan struct{}, 1000)
 	for {
 		n, addr, err := pc.ReadFrom(b[:])
+		ctx, span := tracer.Start(ctx, "handle udp packet")
 		if err != nil {
+			span.SetStatus(codes.Error, err.Error())
+			span.End()
 			return err
 		}
 		select {
 		case <-ctx.Done():
+			span.SetStatus(codes.Error, err.Error())
+			span.End()
 			return ctx.Err()
 		default:
-			log.Printf("dropping request from %v: concurrency limit reached", addr)
+			span.SetStatus(codes.Error, "concurrency limit reached")
+			span.End()
+			log.Levelf(log.Debug, "dropping request from %v: concurrency limit reached", addr)
 			continue
 		case sem <- struct{}{}:
 		}
 		b := append([]byte(nil), b[:n]...)
 		go func() {
+			defer span.End()
 			defer func() { <-sem }()
 			err := s.HandleRequest(ctx, family, addr, b)
 			if err != nil {