Solve panic due to concurrent access to ExportSpans

Signed-off-by: Gahl Saraf <saraf.gahl@gmail.com>

util/tracing/detect/detect.go

@@ -81,6 +81,10 @@ func detect() error {
 		return err
 	}
 
+	exp = &threadSafeExporterWrapper{
+		exporter: exp,
+	}
+
 	if Recorder != nil {
 		Recorder.SpanExporter = exp
 		exp = Recorder

util/tracing/detect/threadsafe.go

@@ -0,0 +1,26 @@
+package detect
+
+import (
+	"context"
+	"sync"
+
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+)
+
+// threadSafeExporterWrapper wraps an OpenTelemetry SpanExporter and makes it thread-safe.
+type threadSafeExporterWrapper struct {
+	mu       sync.Mutex
+	exporter sdktrace.SpanExporter
+}
+
+func (tse *threadSafeExporterWrapper) ExportSpans(ctx context.Context, spans []sdktrace.ReadOnlySpan) error {
+	tse.mu.Lock()
+	defer tse.mu.Unlock()
+	return tse.exporter.ExportSpans(ctx, spans)
+}
+
+func (tse *threadSafeExporterWrapper) Shutdown(ctx context.Context) error {
+	tse.mu.Lock()
+	defer tse.mu.Unlock()
+	return tse.exporter.Shutdown(ctx)
+}