@sentry/bun not reporting any span data

[nzapponi]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/bun

SDK Version

8.13.0

Framework Version

No response

Link to Sentry event

No response

SDK Setup/Reproduction Example

Entrypoint line 1:

import "./sentry.ts"

sentry.ts

import { SocketIoInstrumentation } from "@opentelemetry/instrumentation-socket.io";
import * as Sentry from "@sentry/bun";
import data from "../../../package.json";
import { SENTRY_DSN, SENTRY_ENVIRONMENT } from "./const";

Sentry.init({
  dsn: SENTRY_DSN,
  tracesSampleRate: 1.0,
  environment: SENTRY_ENVIRONMENT,
  release: data.version,
});

Sentry.addOpenTelemetryInstrumentation(new SocketIoInstrumentation());

Steps to Reproduce

1. Start the bun server (which uses Express)
2. Make an API call from the client (or curl) to the server

Expected Result

A trace of the API call from request to response, including all the middleware calls, database queries (I'm using pg), etc.

Actual Result

I get a trace, but every transaction just says "Empty - Transaction did not report any span data"
This also happens on server-side events that I instrumented using await Sentry.startSpan(...): I get a trace that the span is there, but no data within it.

[andreiborza]

Hi, thank you for reporting this. Could you please add debug: true to your sentry options and paste some output?

[nzapponi]

Thanks @andreiborza !

Here it is:

$ bun run --hot src/server.ts
Sentry Logger [log]: Initializing Sentry: process: 72557, thread: main.
Sentry Logger [log]: Integration installed: InboundFilters
Sentry Logger [log]: Integration installed: FunctionToString
Sentry Logger [log]: Integration installed: LinkedErrors
Sentry Logger [log]: Integration installed: RequestData
Sentry Logger [log]: Integration installed: Console
Sentry Logger [log]: Integration installed: Http
Sentry Logger [log]: Integration installed: NodeFetch
Sentry Logger [log]: Integration installed: OnUncaughtException
Sentry Logger [log]: Integration installed: OnUnhandledRejection
Sentry Logger [log]: Integration installed: ContextLines
Sentry Logger [log]: Integration installed: Context
Sentry Logger [log]: Integration installed: Modules
Sentry Logger [log]: Integration installed: BunServer
Sentry Logger [log]: Running in CommonJS mode.
Sentry Logger [debug]: @opentelemetry/api: Registered a global for diag v1.9.0.
Sentry Logger [debug]: @opentelemetry/api: Registered a global for trace v1.9.0.
Sentry Logger [debug]: @opentelemetry/api: Registered a global for context v1.9.0.
Sentry Logger [debug]: @opentelemetry/api: Registered a global for propagation v1.9.0.
Sentry Logger [warn]: @opentelemetry/instrumentation-socket.io Module socket.io has been loaded before @opentelemetry/instrumentation-socket.io so it might not work, please initialize it before requiring socket.io
Sentry Logger [warn]: @opentelemetry/instrumentation-socket.io Module socket.io has been loaded before @opentelemetry/instrumentation-socket.io so it might not work, please initialize it before requiring socket.io
  server:app Registered data model +0ms
[Sentry] express is not instrumented. This is likely because you required/imported express before calling `Sentry.init()`.
  server:app Bootstrapping services +0ms
  server:pg Initializing database +0ms
  server:pg Running migrations +0ms
  server:app Listening on port 28001... +0ms

[nzapponi]

Weird that it says Running in CommonJS mode... isn't it?

[lforst]

@nzapponi The logic for that log message basically just checks whether require is in the global namespace. This is a bit weird in bun, because it maximizes compatibility.

Could you provide a reproduction of where this is not working? Thanks! It's a bit hard to gauge things from looking afar.