Performance monitoring (Custom Instrumentation) logs are not sent on Android

OS:

• Windows
• MacOS
• Linux

Platform:

• iOS
• Android

SDK:

• @sentry/react-native (>= 1.0.0)
• react-native-sentry (<= 0.43.2)

SDK version: 4.11.0

react-native version: 0.70.6

Are you using Expo?

• Yes
• No

Are you using sentry.io or on-premise?

• sentry.io (SaaS)
• on-premise

If you are using sentry.io, please post a link to your issue so we can take a look:

[Link to issue]

Configuration:

(@sentry/react-native)

Sentry.init({
  dsn: 'https://[e-mail]/...'
  tracesSampleRate: 1.0, // send transaction always
});

---

I have following issue:

Performance monitoring (Custom Instrumentation) logs are not sent on Android

Steps to reproduce:

• Step 1
  • Create new React Native project with npx react-native init SampleApp
• Step 2
  • Setup sentry according to the document
    • yarn add @sentry/react-native
    • npx @sentry/wizard -i reactNative -p ios android
• Step 3
  • Setup Performance Monitoring according to the document

import * as Sentry from "@sentry/react-native";

Sentry.init({
  dsn: "https://...",
  tracesSampleRate: 1.0
});

const App: () => Node = () => {
  useEffect(() => {
    const transaction = Sentry.startTransaction({name: 'test-transaction'});
    const span = transaction.startChild({op: 'functionX'});
    // functionCallX
    span.finish();
    transaction.finish();
  }, []);
	...
}

• Step 4
  • Check Performance Monitoring at Sentry.io

Actual result:

• ❌ When I run Custom Instrumentation on Android, I cannot see any logs on sentry.io.

• ✅ No problem with Automatic Instrumentation.

• ✅ No problem with iOS.

• ✅ No problem with sentry-react-native v3.4.3. Seems to be a problem with v4 and above.

sentry-react-native	Instrumentation	iOS	Android
v4.11.0	Automatic Instrumentation	✅	✅
Custom Instrumentation	✅	❌
v3.4.3	Automatic Instrumentation	✅	✅
Custom Instrumentation	✅	✅

Expected result:

Custom Instrumentation performance logs to be sent by Android.

[takahi5]

@krystofwoldrich @marandaneto Thank you for the support! Transaction appeared in Sentry by adding op. 🎉

[krystofwoldrich]

@takahi5 The logs look good. Seems like the SDK is sending the data.

Do you maybe have dynamic sampling enabled in the Sentry UI?

Can you also check Logcat, I suspect you will see the following.

 E  Error when deserializing
  java.lang.IllegalStateException: Missing required field "op"
  	at io.sentry.SpanContext$Deserializer.deserialize(SpanContext.java:323)
  	at io.sentry.protocol.Contexts$Deserializer.deserialize(Contexts.java:170)
  	at io.sentry.SentryBaseEvent$Deserializer.deserializeValue(SentryBaseEvent.java:389)
  	at io.sentry.protocol.SentryTransaction$Deserializer.deserialize(SentryTransaction.java:297)
  	at io.sentry.protocol.SentryTransaction$Deserializer.deserialize(SentryTransaction.java:222)
  	at io.sentry.JsonSerializer.deserialize(JsonSerializer.java:121)
  	at io.sentry.OutboxSender.processEnvelope(OutboxSender.java:161)
  	at io.sentry.OutboxSender.processFile(OutboxSender.java:73)
  	at io.sentry.OutboxSender.processEnvelopeFile(OutboxSender.java:110)
  	at io.sentry.android.core.EnvelopeFileObserver.onEvent(EnvelopeFileObserver.java:64)
  	at android.os.FileObserver$ObserverThread.onEvent(FileObserver.java:166)
  	at android.os.FileObserver$ObserverThread.observe(Native Method)
  	at android.os.FileObserver$ObserverThread.run(FileObserver.java:116)

@takahi5 You can try to add op and the transaction should appear in Sentry.

const transaction = Sentry.startTransaction({ name: 'test-transaction', op: 'test-op' });

@markushi @romtsn ~Was op always required on Android or is it some recent change?~ I see it’s from 6.0.0-alpha.1