Nil line at beginning of every trace

[dxalfonzo]

Hi!

Guys, I am using Otel v0.20.0 at the moment with a Otel GRPC exporter otlpgrpc. When setting the service name, I am getting a line nil at the beginning of every trace.

I narrowed down to the SDKs tracing resource

	res := resource.NewWithAttributes(semconv.ServiceNameKey.String(appName))

but I can't get rid of it.

Here is the complete code

package tracing

import (
	"context"
	"fmt"
	"os"

	"go.opentelemetry.io/otel"
	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/codes"
	"go.opentelemetry.io/otel/exporters/otlp"
	"go.opentelemetry.io/otel/exporters/otlp/otlpgrpc"
	"go.opentelemetry.io/otel/propagation"
	"go.opentelemetry.io/otel/sdk/resource"
	sdktrace "go.opentelemetry.io/otel/sdk/trace"
	"go.opentelemetry.io/otel/semconv"
	"go.opentelemetry.io/otel/trace"
)

func InitTracer(collectorAddr string, appName string, operationName string) (trace.Span, *sdktrace.TracerProvider, context.Context) {
	ctx := context.Background()
	driver :=
	 otlpgrpc.NewDriver(
		otlpgrpc.WithInsecure(),
		otlpgrpc.WithEndpoint(collectorAddr),
	)
	exporter, err := otlp.NewExporter(ctx, driver)
	if err != nil {

		fmt.Printf("Error initializing the tracer exporter")
	}
	
	res := resource.NewWithAttributes(semconv.ServiceNameKey.String(appName))
	tp := sdktrace.NewTracerProvider(
		sdktrace.WithBatcher(exporter),
		sdktrace.WithResource(res),
	)
	otel.SetTracerProvider(tp)
	otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
	ctx, span := tp.Tracer(operationName).Start(ctx, operationName)
	return span, tp, ctx
}

func ErrExit(span trace.Span, tp *sdktrace.TracerProvider, errorMsg string, exitNumber int) {

	span.SetAttributes(attribute.String("error", errorMsg))
	span.SetStatus(codes.Error, errorMsg)
	span.End()
	tp.Shutdown(context.Background())
	fmt.Println(errorMsg)
	os.Exit(exitNumber)
}

func Attribute(span trace.Span, label string, msg string) trace.Span {

	span.SetAttributes(attribute.String(label, msg))
	return span
}

Removing the whole sdktrace.WithResource(res), remove the nil line. Replacing the resource with empty, or other type adds the nil again. I am wondering if there is a way to silenced it.

[dxalfonzo]

Found my answer: Upgrade to 1.1.0