Not getting Spans traces everytime.

[venmayurnemade]

Environment

SaaS (https://sentry.io/)

What are you trying to accomplish?

Issue Summary:

I'm experiencing an issue where spans are not consistently visible in my Sentry dashboard, even though they appear correctly in the React Native client logs. Despite proper logging, the spans are not being captured or displayed in Sentry. I aim to ensure that every time I initiate a transaction, the associated spans are traced and visible in the dashboard.

Current Implementation:

I'm utilizing Sentry.startSpanManual to create transactions and their respective steps. However, the spans are not appearing in Sentry as expected.

Seeking Assistance:

Could this issue be related to a problem with Sentry's functions, or is it a coding issue on my end? I'm looking for guidance on how to ensure that all spans are properly traced and displayed in the Sentry dashboard.

How are you getting stuck?

While developing a feature to assess the performance of my application, I aim to implement functionality that measures the load time of React components and the duration of API calls as distinct steps.​

Where in the product are you?

Performance

Link

No response

DSN

No response

Version

No response

[getsantry]

Assigning to @getsentry/support for routing ⏲️

[venmayurnemade]

I've tried several approaches to resolve this, including:

1. Implementing traceSampler.
2. Inserting a dummy transaction.
3. Enabling all relevant flags in Sentry.init, such as:
   • enableNativeFramesTracking: true
   • enableAppStartTracking: true
   • enableStallTracking: true
   • enableAutoPerformanceTracing: true
4. Removing integrations: [ReactNavigationInstrumentation].

Along with various other solutions found online, but none have worked so far.

[krystofwoldrich]

Hello,
thank you for the message, and the details about what you have tried.

Depending on the context Sentry.startSpanManual creates a transaction, if no existing transaction, or a child span to an existing transaction, this is for example case of using ReactNavigationInstrumentation which creates a transaction on navigation.

If you want to see the startSpanManual as a transaction in sentry every time, use the following code:

Sentry.startSpanManual({
  forceTransaction: true,
});

https://docs.sentry.io/platforms/react-native/tracing/instrumentation/custom-instrumentation/#span-starting-options

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Just to confirm, do you see each span in the traceSampler?

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The mentioned flags enableNativeFramesTracking, enableAppStartTracking, enableStallTracking, enableAutoPerformanceTracing only affect attributes that are attached to the spans and transactions, but do not affect if a transaction/span is sent to Sentry.

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Let us know if this helped you resolve the issue.