No JS-level errors sent in Release mode

[matt-dalton]

OS:

• Windows
• [ x] MacOS
• Linux

Platform:

• iOS
• Android

SDK:

• @sentry/react-native
• react-native-sentry

react-native version: 0.60.6

Init Code:

Sentry.init({
    dsn: 'https://[email protected]/blah',
    ignoreErrors: [NetworkError.name],
    debug: true // just while I test
})

---

I have following issue:

Our React Native sentry installation no longer reports JS-level bugs. I'm now on react-native 0.60.6 & @sentry/react-native 1.0.9. I'm currrently testing on iOS but it hasn't been working on Android either. It hasn't been working for us for a while so don't think it's a new version issue.

I've tried removing and reinstalling the library.

When I run in dev mode, any error I throw appears in Sentry. But if I take the same code and run in release mode nothing gets sent. I can see the following in the logs in Xcode:

2019-10-17 13:25:14.309488+0100 [63272:2506227] Sentry Started -- Version: 4.4.0
2019-10-17 13:25:22.524 [error][tid:com.facebook.react.JavaScript] Sentry Logger [Error]: An event processor returned null, will not send event.

Steps to reproduce:

• Install RN 0.60.6 & @sentry/react-native 1.0.9
• Init the lib, then add throw new Error('test') on root App.js
• Run the app in dev mode
• It works! Bug appears in Sentry
• Build the app in release mode (i.e. BuildConfiguration: Release)
• Run the app.

Actual result:

• No bug received in Sentry

Expected result:

• Should be a bug report

[filipef101]

Does using a older version fix this?

[matt-dalton]

Is there any particular version I should try going back to? As I say, this hasn't worked for a while so not sure how far to go back

[AChevallier]

I have the same problem ! :(
I cannot say since when.

[jpolo]

Still reproducible on RN 0.61.5 + Sentry 1.1.0

[ghost]

Any update on this? Facing same issue on "react-native": "0.61.4" "@sentry/react-native": "1.2.0"
Doesn't work for android release build. Works fine for iOS though.

[filipef101]

It's dumb this is open for so long when there are paying customers affected by this

[matt-dalton]

I managed to fix this after speaking to tech support. Achieved this by switching from ignoreErrors: [NetworkError.name] to a beforeSend function. I wrote something super simple like this:

const ignoredEventTypes: Array<string> = [NetworkError.name]

export default (event: Event) => {
    const eventType = get(event, 'exception.values[0].type')

    if (ignoredEventTypes.includes(eventType)) {
        // Not returning the event ignores it
        return
    }

    return event
}

For some reason, ignoreErrors was blocking anything

[HazAT]

I am closing this since it seems to be solved.
The log Sentry Logger [Error]: An event processor returned null, will not send event. says that we discarded it because ignoreError matched it.
I am not sure if all ppl in this thread have exactly this problem?!

[Aryk]

I managed to fix this after speaking to tech support. Achieved this by switching from ignoreErrors: [NetworkError.name] to a beforeSend function. I wrote something super simple like this:

const ignoredEventTypes: Array<string> = [NetworkError.name]

export default (event: Event) => {
    const eventType = get(event, 'exception.values[0].type')

    if (ignoredEventTypes.includes(eventType)) {
        // Not returning the event ignores it
        return
    }

    return event
}

For some reason, ignoreErrors was blocking anything

1. What is "get" in your function? Can't seem to find it in sentry lib....
2. Im getting the same error:

Are you suggesting essentially not to use "ignoreErrors" and do basically do the ignoring in beforeSend, seems kind of hacky...but is what it is I guess...

[jennmueng]

@Aryk Can I see what you have set for ignoreErrors?

[Aryk]

Sure ...here's the entire code:

Sentry.init({
  dsn: <hidden>,
  enableInExpoDevelopment: true,
  debug: true,
  environment: Constants.manifest.releaseChannel || "development",
  attachStacktrace: true,
  ignoreErrors: [
  "GraphQL Error (Code: 502)", // On development, get this weird intermittent message.
  "Background Location has not been configured. To enable it",
  "Network request failed",
  "Rendered fewer hooks than expected. This may be caused by",
  ],
});
// Keys are snake_case because this was the convention in the documentation.
Sentry.setTags({
  device_name: Constants.deviceName,
  ios_model: Constants.platform.ios?.model,
  ios_build_number: Constants.manifest.ios?.buildNumber,
  android_version_code: Constants.manifest.android?.versionCode,
  revision_id: Constants.manifest.revisionId,
  release_id: Constants.manifest.releaseId,
  version: Constants.manifest.version,
  // system_version: Constants.systemVersion.toString(),
});

[jennmueng]

@Aryk So is the event being dropped an event that shouldn't be dropped I assume right? And can I see you have already set debug: true, can I have the logs?

[Aryk]

Sure...how do I get you the logs? I don't see it write to any log files in my directory. I can give you the console output, does that work?

[Aryk]

This is all I'm getting in my console:

[jennmueng]

@Aryk Hmm that looks correct, I see you have "Network request failed" in your ignoreErrors, it's being ignored thus the message. Also, the message is showing because you have debug: true set. If you disable debug the error won't be shown.

[Aryk]

Wow ok...I will turn debug off then. lol

Thanks for pointing that out...this error was driving me crazy