propagation.extract is not working as expected since Deno 2.1.5

[kawmra]

Version: Deno 2.1.5

Since Deno 2.1.5, propagation.extract in OpenTelemetry has stopped functioning correctly.

In Deno 2.1.4, the following code worked as expected:

import { context, propagation, trace } from "npm:@opentelemetry/api@1";
import { W3CTraceContextPropagator } from "npm:@opentelemetry/core@1";

propagation.setGlobalPropagator(new W3CTraceContextPropagator());

const carrier = {
  traceparent: "00-00000000000000000000000000000001-0000000000000001-01",
  tracestate: undefined,
};

const newContext = propagation.extract(context.active(), carrier);
console.log(trace.getSpan(newContext)?.spanContext());

Running this code produces the following output:

{
  traceId: "00000000000000000000000000000001",
  spanId: "0000000000000001",
  traceFlags: 1,
  isRemote: true
}

However, when executing the same code in Deno 2.1.5, undefined is returned instead.

When running it in Deno 2.1.5, the OTEL_DENO=true environment variable was set.

Am I missing something?

[lucacasonato]

Ack - a very temporary workaround: you can do globalThis[Symbol.for("opentelemetry.js.api.1")].propagation = new W3CTraceContextPropagator(); for now.

This is related to us automatically registering tracer / metrics / context handling for @opentelemetry/api now.

[kawmra]

Thank you for your quick response!
I'll try the workaround. I'm looking forward to OTEL being officially supported 🥰