Duplication of OpenTelemetry Spans in HTTP requests with @sentry/node

[vibaiher-qatium]

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/node

SDK Version

8.18.0

Framework Version

Express 4.19.2

Link to Sentry event

No response

SDK Setup/Reproduction Example

Sentry.init({
      dsn: settings.server,
      environment: settings.environment,
      release: settings.release,
      enabled: settings.enabled,
      skipOpenTelemetrySetup: true,
      initialScope: (scope) => {
        scope.setTag("runtime_environment", settings.runtime);
        return scope;
      }
});

Steps to Reproduce

1. Enable opentelemetry in your app using a file that is registered when executing node. Opentelemetry setup must use node autoinstrumentation. Example: node --require @qatium/open-telemetry-express build/api.js
2. In you express api file, enable Sentry integration with opentelemetry setup to false and tracing disabled.
3. Generate some requests in endpoints that have some http calls.

Expected Result

The expected behavior is that @sentry/node does not register the opentelemetry-instrumentation-node-fetch instrumentation if the tracing option is disabled in Sentry's configuration.

Actual Result

Despite having the tracing option disabled in Sentry's configuration, the opentelemetry-instrumentation-node-fetch library is still being registered, causing duplication of Span information when using OpenTelemetry instrumentation for HTTP.

[andreiborza]

Hello thanks for writing in.

Could you please provide a stackblitz or a github repo where we could try this out?

[vibaiher-qatium]

Thank you for your prompt response. I understand the need for a sample project to help investigate the issue. However, creating such a project would be quite time-consuming and resource-intensive for us at the moment.

While trying to understand the code, I arrived at the following points:

• Line 65 in index.ts
• Line 87 in node-fetch.ts

It appears that the code is not checking whether tracing is enabled or not. It seems likely that adding a guard clause could resolve the issue.

Is it possible to look into this issue based on the description and details provided? We have outlined the specific problem and steps to reproduce it in detail. If you need any specific logs or further information, I would be happy to provide them.

Thank you for your understanding and assistance.

[andreiborza]

Understood, thanks for having a closer look. We discussed this internally and we might want to guard these integrations in the future.

For now, we recommend to filter out the node fetch integration in your init call:

const integrations = Sentry.getDefaultIntegrationsWithoutPerformance().filter((integration) => integration.name !== 'NodeFetch')

Sentry.init({
   ...
   integrations,
})

Please let me know if that helps.

[vibaiher-qatium]

Thank you @andreiborza, we will give it a try.