reactHost.reload didn't work

[talentedman]

Description

------------reload---------
Activity activity = getCurrentActivity();
ReactApplication app = (ReactApplication) activity.getApplication();
ReactHost reactHost = app.getReactHost();
if (reactHost != null) {
reactHost.reload("Manual reload from new arch");
}

--------------getJSBundleFile----------------
override fun getJSBundleFile(): String? {
return JsBundleHelper.getJSBundleFile(this.application)
}

When calling reload, the js can trigger reloading again, and JsBundleHelper.getJSBundleFile can also print the latest patch address normally. However, the reloaded js is still the old version. But when the app is killed and restarted, the new patch can take effect normally. Why?

Steps to reproduce

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React Native Version

0.78.0

Affected Platforms

Build - Windows

Areas

TurboModule - The New Native Module System, JSI - Javascript Interface, Bridgeless - The New Initialization Flow, Codegen, Fabric - The New Renderer

Output of npx @react-native-community/cli info

System:
  OS: Windows 11 10.0.26100
  CPU: (6) x64 Intel(R) Core(TM) i5-9400F CPU @ 2.90GHz
  Memory: 8.52 GB / 31.94 GB
Binaries:
  Node:
    version: 20.18.0
    path: ~\.nvmd\versions\20.18.0\node.EXE
  Yarn:
    version: 1.22.22
    path: ~\.nvmd\versions\20.18.0\yarn.CMD
  npm:
    version: 10.8.2
    path: ~\.nvmd\versions\20.18.0\npm.CMD
  Watchman: Not Found
SDKs:
  Android SDK:
    API Levels:
      - "30"
      - "31"
      - "32"
      - "33"
      - "34"
      - "35"
    Build Tools:
      - 30.0.3
      - 33.0.0
      - 33.0.1
      - 34.0.0
      - 35.0.0
      - 35.0.1
    System Images:
      - android-35 | Google Play Intel x86_64 Atom
    Android NDK: Not Found
  Windows SDK: Not Found
IDEs:
  Android Studio: AI-243.22562.218.2431.13114758
  Visual Studio: Not Found
Languages:
  Java: 17.0.14
  Ruby: Not Found
npmPackages:
  "@react-native-community/cli":
    installed: 15.1.3
    wanted: 15.1.3
  react:
    installed: 19.0.0
    wanted: 19.0.0
  react-native:
    installed: 0.78.0
    wanted: 0.78.0
  react-native-windows: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found

Stacktrace or Logs

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MANDATORY Reproducer

/

Screenshots and Videos

No response

[react-native-bot]

Warning

Missing reproducer: We could not detect a reproducible example in your issue report. Reproducers are mandatory and we can accept only one of those as a valid reproducer:

• For majority of bugs: send us a Pull Request with the RNTesterPlayground.js edited to reproduce your bug.
• If your bug is UI related: a Snack
• If your bug is build/upgrade related: a project using our Reproducer Template

You can read more about about it on our website: How to report a bug.

[cortinico]

However, the reloaded js is still the old version

What do you mean with still the old version?

[talentedman]

However, the reloaded js is still the old version

What do you mean with still the old version?

For example, when I start up, jsbundle1 is loaded. At this time, jsbundle2 is downloaded via the network and placed in the specified location. Then, after executing the reload method, the page restarts, and getJsBundleFile also prints jsbundle2. But in reality, the code is still jsbundle1, that is, the old version.

[javache]

In the new architecture getJSBundleFile is only evaluated once at startup. DefaultReactHost creates a JSBundleLoader with the given path on startup. If you wish to make this dynamic, you would need to create your own DefaultReactHostDelegate to pass in a custom jsBundleLoader.

react-native/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/defaults/DefaultReactHost.kt

Line 122 in f214a52

JSBundleLoader.createFileLoader(jsBundleFilePath)