Filter Processor causes exported spans to lose ResourceDefinition information in Jaeger

[Aaronontheweb]

Bug Report

<PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.0.0-rc9.4" />
<PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.0.0-rc9.4" />
<PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.0.0-rc9.4" />
<PackageReference Include="OpenTelemetry.Exporter.Jaeger" Version="1.0.1" />
<PackageReference Include="OpenTelemetry.Exporter.Prometheus" Version="1.2.0-rc5" />

Runtime version: .NET 6.0

Symptom

When using the a filter CompositeProcessor<Activity> that is nearly identical to what's included in the OpenTelemetry .NET documentation:

opentelemetry-dotnet/docs/trace/extending-the-sdk/MyFilteringProcessor.cs

Lines 34 to 53 in 4310e08

	internal sealed class MyFilteringProcessor : CompositeProcessor<Activity>
	{
	private readonly Func<Activity, bool> filter;
	public MyFilteringProcessor(BaseProcessor<Activity> processor, Func<Activity, bool> filter)
	: base(new[] { processor })
	{
	this.filter = filter ?? throw new ArgumentNullException(nameof(filter));
	}
	public override void OnEnd(Activity activity)
	{
	// Call the underlying processor
	// only if the Filter returns true.
	if (this.filter(activity))
	{
	base.OnEnd(activity);
	}
	}
	}

I compose my OpenTelemetry tracing integration like so:

var resource = ResourceBuilder.CreateDefault()
            .AddService(Assembly.GetEntryAssembly().GetName().Name, serviceInstanceId: $"{Dns.GetHostName()}");

        // enables OpenTelemetry for ASP.NET / .NET Core
        services.AddOpenTelemetryTracing(builder =>
        {
            builder
                .SetResourceBuilder(resource)
                .AddPhobosInstrumentation()
                .AddHttpClientInstrumentation()
                .AddAspNetCoreInstrumentation()
                .AddProcessor(new ExcludeShardingProcessor(new[]
                    { new SimpleActivityExportProcessor(new JaegerExporter(new JaegerExporterOptions())) }));
        });

The filter works as expected - however, I lose all of my ResourceBuilder information and see this instead:

What is the expected behavior?

I expected to see my resource data, which I could see before I added the CompositeProcessor<Activity> to my pipeline:

What is the actual behavior?

- none of my ResourceDefinition data is present on the traces.

Reproduce

Run

opentelemetry-dotnet/docs/trace/extending-the-sdk/Program.cs

Lines 24 to 50 in 4310e08

	public class Program
	{
	private static readonly ActivitySource DemoSource = new("OTel.Demo");
	public static void Main()
	{
	using var tracerProvider = Sdk.CreateTracerProviderBuilder()
	.SetSampler(new MySampler())
	.AddSource("OTel.Demo")
	.SetResourceBuilder(ResourceBuilder.CreateEmpty().AddDetector(new MyResourceDetector()))
	.AddProcessor(new MyProcessor("ProcessorA"))
	.AddProcessor(new MyProcessor("ProcessorB"))
	.AddProcessor(new SimpleActivityExportProcessor(new MyExporter("ExporterX")))
	.AddMyExporter()
	.Build();
	using (var foo = DemoSource.StartActivity("Foo"))
	{
	using (var bar = DemoSource.StartActivity("Bar"))
	{
	using (var baz = DemoSource.StartActivity("Baz"))
	{
	}
	}
	}
	}
	}

with the MyFilteringProcessor wrapped around a JaegerExporter.

[cijothomas]

#3241 same? Has a fix in latest alpha.

[Aaronontheweb]

#3241 same? Has a fix in latest alpha.

totally missed that issue - I can check

[cijothomas]

Closing as this is expected to be fixed. Feel free to reopen if that was not the issue here.