UnexpectedNativeTypeException: Value for message cannot be cast from ReadableNativeMap to String

[matthias-pichler]

OS:

• Windows
• MacOS
• Linux

Platform:

• iOS
• Android

SDK:

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

react-native version: 0.60.5

Init Code:

Sentry.init({
  dsn: Config.SENTRY_DSN,
  environment: process.env.NODE_ENV || 'development'
});

---

I have following issue:

As soon as I call init on the Sentry SDK my app crashes with UnexpectedNativeTypeException: Value for message cannot be cast from ReadableNativeMap to String. Though this only happens on Android and not on iOS.

This issue was reported in the beta as well: #612 (comment)

and #651 also seems related:

react-native info

info Fetching system and libraries information...
System:
    OS: macOS 10.14.6
    CPU: (8) x64 Intel(R) Core(TM) i7-8569U CPU @ 2.80GHz
    Memory: 105.25 MB / 16.00 GB
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 12.9.1 - /usr/local/bin/node
    Yarn: 1.17.3 - /usr/local/bin/yarn
    npm: 6.10.3 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  SDKs:
    iOS SDK:
      Platforms: iOS 12.4, macOS 10.14, tvOS 12.4, watchOS 5.3
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.5791312
    Xcode: 10.3/10G8 - /usr/bin/xcodebuild
  npmPackages:
    react: ^16.9.0 => 16.9.0 
    react-native: ^0.60.5 => 0.60.5 
  npmGlobalPackages:
    react-native-cli: 2.0.1

screenshot:

stacktrace in logcat:

09-05 13:56:09.528  7448  7530 E unknown:ReactNative: Exception in native call
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: com.facebook.react.bridge.UnexpectedNativeTypeException: Value for message cannot be cast from ReadableNativeMap to String
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.ReadableNativeMap.checkInstance(ReadableNativeMap.java:141)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.ReadableNativeMap.getNullableValue(ReadableNativeMap.java:129)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.ReadableNativeMap.getString(ReadableNativeMap.java:163)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at io.sentry.RNSentryModule.sendEvent(RNSentryModule.java:209)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at java.lang.reflect.Method.invoke(Native Method)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:372)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:158)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at android.os.Handler.handleCallback(Handler.java:873)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at android.os.Handler.dispatchMessage(Handler.java:99)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:29)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at android.os.Looper.loop(Looper.java:193)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:232)
09-05 13:56:09.528  7448  7530 E unknown:ReactNative: 	at java.lang.Thread.run(Thread.java:764)

Steps to reproduce:

• call init on react-native 0.60.5 with @sentry/react-native 1.0.4

Actual result:

• App crashes with UnexpectedNativeTypeException

Expected result:

• SDK is set up successfully

[HazAT]

OK, I know how to fix this error but I want to understand how this happens.
So there is no other place in your codebase where you have any calls to Sentry.*?

The error message clearly says that the value of event.message is not a string.

Edit: logLevel is not longer support in the options, maybe this triggers an error.

[matthias-pichler]

@HazAT
Ok thanks for the hint about logLevel.

I removed every call to Sentry in my Application and replaced the init call with just the dsn. Still the same error

[HazAT]

I am really curious, the fix is easy, I need to safeguard it like here:

sentry-react-native/android/src/main/java/io/sentry/RNSentryModule.java

Lines 180 to 192 in 32c283b

	try {
	if (breadcrumb.hasKey("data") && breadcrumb.getMap("data") != null) {
	Map<String, String> newData = new HashMap<>();
	for (Map.Entry<String, Object> data : ((ReadableNativeMap)breadcrumb.getMap("data")).toHashMap().entrySet()) {
	newData.put(data.getKey(), data.getValue() != null ? data.getValue().toString() : null);
	}
	breadcrumbBuilder.setData(newData);
	}
	} catch (UnexpectedNativeTypeException e) {
	logger.warning("Discarded breadcrumb.data since it was not an object");
	} catch (ClassCastException e) { // This needs to be here for RN < 0.60
	logger.warning("Discarded breadcrumb.data since it was not an object");
	}

But is it possible for you to inspect the value of event.getMap('message')?
I want to know the value so I can understand where this is coming from. If it's from our SDK internally I need to fix this in another place.

[matthias-pichler]

So it was in fact super interesting what caused this error but totally unrelated to anything discussed here:
See: #653

[mikeRChambers610]

what is the fix....?