react / react/react-native

`ReactNoCrashSoftException: "Cannot find EventEmitter for receivedTouches"` warning in Android Native UI Component

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#46,501 6 comments 1 reaction 0 assignees View on GitHub

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Issue: Author Provided Repro Needs: Author Feedback Platform: Android
Dominant language
C++
Stars
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Forks
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Avg merge
1d 23h
Merged PRs (30d)
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Description

Description

We are creating an Android Native UI Component consisting of ViewPager2 and RecyclerView.
When a touch occurs in RecyclerView, the following error occurs.

Steps to reproduce
  1. Run the project.
  2. Scroll through the thumbnail list.
React Native Version

0.75.3

Affected Platforms

Runtime - Android

Output of npx react-native info
System:
  OS: macOS 14.1
  CPU: (12) arm64 Apple M2 Pro
  Memory: 96.50 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.11.1
    path: ~/.nvm/versions/node/v20.11.1/bin/node
  Yarn: Not Found
  npm:
    version: 10.2.4
    path: ~/.nvm/versions/node/v20.11.1/bin/npm
  Watchman:
    version: 2023.10.23.00
    path: /usr/local/bin/watchman
Managers:
  CocoaPods:
    version: 1.14.3
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.4
      - iOS 17.4
      - macOS 14.4
      - tvOS 17.4
      - visionOS 1.1
      - watchOS 10.4
  Android SDK: Not Found
IDEs:
  Android Studio: 2024.1 AI-241.18034.62.2412.12266719
  Xcode:
    version: 15.3/15E204a
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.11
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.75.3
    wanted: 0.75.3
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: Not found
  newArchEnabled: false
Stacktrace or Logs
Unhandled SoftException
com.facebook.react.bridge.ReactNoCrashSoftException: Cannot find EventEmitter for receivedTouches: ReactTag[2131230852] UIManagerType[2] EventName[topTouchStart]
	at com.facebook.react.uimanager.events.ReactEventEmitter.receiveTouches(ReactEventEmitter.java:102)
	at com.facebook.react.uimanager.events.TouchEvent.dispatchModern(TouchEvent.kt:124)
	at com.facebook.react.uimanager.events.EventDispatcherImpl$DispatchEventsRunnable.run(EventDispatcherImpl.java:376)
	at android.os.Handler.handleCallback(Handler.java:958)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:27)
	at android.os.Looper.loopOnce(Looper.java:230)
	at android.os.Looper.loop(Looper.java:319)
	at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:235)
	at java.lang.Thread.run(Thread.java:1012)

Unhandled SoftException
com.facebook.react.bridge.ReactNoCrashSoftException: Cannot find EventEmitter for receivedTouches: ReactTag[2131230852] UIManagerType[2] EventName[topTouchMove]
	at com.facebook.react.uimanager.events.ReactEventEmitter.receiveTouches(ReactEventEmitter.java:102)
	at com.facebook.react.uimanager.events.TouchEvent.dispatchModern(TouchEvent.kt:124)
	at com.facebook.react.uimanager.events.EventDispatcherImpl$DispatchEventsRunnable.run(EventDispatcherImpl.java:376)
	at android.os.Handler.handleCallback(Handler.java:958)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:27)
	at android.os.Looper.loopOnce(Looper.java:230)
	at android.os.Looper.loop(Looper.java:319)
	at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:235)
	at java.lang.Thread.run(Thread.java:1012)
Unhandled SoftException
com.facebook.react.bridge.ReactNoCrashSoftException: Cannot find EventEmitter for receivedTouches: ReactTag[2131230852] UIManagerType[2] EventName[topTouchEnd]
	at com.facebook.react.uimanager.events.ReactEventEmitter.receiveTouches(ReactEventEmitter.java:102)
	at com.facebook.react.uimanager.events.TouchEvent.dispatchModern(TouchEvent.kt:124)
	at com.facebook.react.uimanager.events.EventDispatcherImpl$DispatchEventsRunnable.run(EventDispatcherImpl.java:376)
	at android.os.Handler.handleCallback(Handler.java:958)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:27)
	at android.os.Looper.loopOnce(Looper.java:230)
	at android.os.Looper.loop(Looper.java:319)
	at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:235)
	at java.lang.Thread.run(Thread.java:1012)
Reproducer

https://github.com/dekim1028/error

Screenshots and Videos

https://github.com/user-attachments/assets/86d636c7-4ecc-4666-a49e-208b88e701af

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Run the linked reproducer and scroll through its thumbnail list to confirm the warning. Start by tracing the reported path through ReactEventEmitter.java, TouchEvent.kt, and EventDispatcherImpl.java; done means the Android UI component no longer emits the reported receivedTouches warnings during scrolling.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, react-native
Domain
mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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