JS server closed immediately!

[sajaddp]

Hi,
I want to use react-native on windows 10 that is new installed,
So i flow all instructions on https://facebook.github.io/react-native/docs/getting-started (React Native CLI Quickstart).

But when i use npx react-native run-android the JS server closed immediately!

How can i solve it?

My system info:

    OS: Windows 10 10.0.18363
    CPU: (8) x64 Intel(R) Core(TM) i7-4810MQ CPU @ 2.80GHz
    Memory: 9.97 GB / 15.88 GB
  Binaries:
    Node: 13.3.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.21.1 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 6.13.4 - C:\Program Files\nodejs\npm.CMD
  SDKs:
    Android SDK:
      API Levels: 19, 23, 26, 27, 28, 29
      Build Tools: 23.0.1, 26.0.3, 27.0.3, 28.0.3, 29.0.2
      System Images: android-28 | Intel x86 Atom, android-28 | Intel x86 Atom_64, android-28 | Google APIs Intel x86 Atom, android-28 | Google APIs Intel x86 Atom_64, android-28 | Google Play Intel x86 Atom, android-28 | Google Play Intel x86 Atom_64, android-29 | Google APIs Intel x86 Atom
  IDEs:
    Android Studio: Version  3.5.0.0 AI-191.8026.42.35.6010548
  npmPackages:
    react: 16.9.0 => 16.9.0
    react-native: 0.61.5 => 0.61.5

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[gokhandoslu]

I think this is not an issue about react-native, please search it on stackoverflow.com first.
Did you check port 8081 is already in use?
Can you share any log about the error?

[Ajinkya-B]

I'm having the same issue!
This is the error that shows

up in cmd
React-Native version:0.61.5

[gokhandoslu]

This is an issue about metro-config. I think it has been fixed by this commit
react/metro@7c6f30b

metro-config version in @react-native-community/cli should be updated to fix this issue.
You can follow the issue from react-native-community/cli#853

[Ajinkya-B]

I'm actually super new to React-Native and this was my first attempt to set up the server. Can u pls clarify the specific steps I am supposed to take. React-Native version: 0.61.5 plus I also followed every step showed on the get started in React-Native page.

[gokhandoslu]

Until the pull request (react-native-community/cli#864) merged, you can try a workaround below but I am not sure if it will work.

• open node_modules/metro-config/src/defaults/blacklist.js
• update its content with this one: https://github.com/facebook/metro/blob/7c6f30b592b2fb23cee55b54f1aa4b7a522dec18/packages/metro-config/src/defaults/blacklist.js
• run npx react-native run-android

Please provide a feedback on whether the solution works or not

[Ajinkya-B]

Thank you! This alternative worked. I put [] brackets around the \/ in the first line, but I don't know if not putting them works.
var sharedBlacklist = [
/node_modules[\/]react[\/]dist[\/]./,
/website/node_modules/./,
/heapCapture/bundle.js/,
/./tests/./,
];

[no-response]

It's been three weeks since we asked for additional information from the author of this issue. As it happens, we don't have enough information to take action. We are going to close this issue, but please do not hesitate to open a new issue if you are still encountering this problem.

[Prakashchanchal]

Go to android folder and run the gradlew clean and again run the project..it gonna work👍