[Bug]: Error Occurred When Fetch Template Resource; Failed To Connect To /address:3000

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System Information

This article aims to provide a detailed analysis of the issue encountered while setting up an empty Lynx project and attempting to run it on an Android device. The problem lies in the inability to connect to the PC host, resulting in an error message indicating that the app bundle is unavailable.

System Specifications

  • Operating System: Linux 6.13 EndeavourOS
  • CPU: 12-core 11th Gen Intel(R) Core(TM) i5-11400F @ 2.60GHz
  • Memory: 4.31 GB / 15.48 GB
  • Container: Yes
  • Shell: 5.9 - /usr/bin/zsh

Binaries and Packages

  • Node: 23.9.0 - /usr/bin/node
  • pnpm: 10.5.2 - /usr/bin/pnpm
  • bun: 1.2.4 - ~/.bun/bin/bun
  • npm Packages:
    • @lynx-js/qrcode-rsbuild-plugin: ^0.3.3 => 0.3.3
    • @lynx-js/react: ^0.105.0 => 0.105.0
    • @lynx-js/react-rsbuild-plugin: ^0.9.0 => 0.9.0
    • @lynx-js/rspeedy: ^0.8.2 => 0.8.2
    • @lynx-js/types: ^3.2.0 => 3.2.0

Issue Description

When attempting to set up an empty Lynx project and run it on an Android device, the following error occurs:

Failed to connect to /address:3000

The error message suggests that the app bundle is unavailable, but it is indeed available on the PC host where the dev server is running. The issue persists even after configuring the server port and host in the lynx.config.ts file.

Reproduction Steps

To reproduce the issue, follow these steps:

  1. Install dependencies: Run pnpm i
  2. Start the dev server: Run pnpm dev
  3. Scan the QR code: Use the explorer app to scan the QR code generated by the dev server
  4. Receive the error: The Android device will display the error message indicating that the app bundle is unavailable

Additional Information

The error message is accompanied by a screenshot of the error, which can be viewed in the following link:

Reproduce link: https://github.com/lynx-family/lynx-repro

Possible Causes

Based on the reproduction steps and the error message, the possible causes of this issue are:

  • Incorrect server configuration: The server port and host may not be correctly configured in the lynx.config.ts file.
  • Network connectivity issues: There may be network connectivity issues between the PC host and the Android device, preventing the app bundle from being accessed.
  • App bundle availability: The app bundle may not be available on the Android device, even though it is available on the PC host.

Solutions

To resolve this issue, the following solutions can be attempted:

  • Verify server configuration: Ensure that the server port and host are correctly configured in the lynx.config.ts file.
  • Check network connectivity: Verify that there are no network connectivity issues between the PC host and the Android device.
  • Verify app bundle availability: Ensure that the app bundle is available on the Android device.

Conclusion

Frequently Asked Questions

This article aims to provide a comprehensive Q&A section to help users troubleshoot the error occurred when fetching template resource; failed to connect to /address:3000.

Q: What is the cause of the error "Failed to connect to /address:3000"?

A: The error "Failed to connect to /address:3000" is caused by the inability to connect to the PC host, resulting in an error message indicating that the app bundle is unavailable.

Q: What are the possible causes of this issue?

A: The possible causes of this issue are:

  • Incorrect server configuration: The server port and host may not be correctly configured in the lynx.config.ts file.
  • Network connectivity issues: There may be network connectivity issues between the PC host and the Android device, preventing the app bundle from being accessed.
  • App bundle availability: The app bundle may not be available on the Android device, even though it is available on the PC host.

Q: How can I verify the server configuration?

A: To verify the server configuration, follow these steps:

  1. Check the lynx.config.ts file: Ensure that the server port and host are correctly configured in the lynx.config.ts file.
  2. Verify the server URL: Ensure that the server URL is correctly set in the lynx.config.ts file.
  3. Check the server logs: Check the server logs to ensure that the server is running and accessible.

Q: How can I check network connectivity?

A: To check network connectivity, follow these steps:

  1. Verify the network connection: Ensure that the network connection between the PC host and the Android device is stable and working correctly.
  2. Check the network settings: Ensure that the network settings on both the PC host and the Android device are correctly configured.
  3. Test the network connection: Test the network connection by pinging the PC host from the Android device.

Q: How can I verify app bundle availability?

A: To verify app bundle availability, follow these steps:

  1. Check the app bundle location: Ensure that the app bundle is located in the correct directory on the PC host.
  2. Verify the app bundle file: Ensure that the app bundle file is correctly named and has the correct file extension.
  3. Check the app bundle size: Ensure that the app bundle size is correct and not corrupted.

Q: What are the common solutions to this issue?

A: The common solutions to this issue are:

  • Verify server configuration: Ensure that the server port and host are correctly configured in the lynx.config.ts file.
  • Check network connectivity: Verify that there are no network connectivity issues between the PC host and the Android device.
  • Verify app bundle availability: Ensure that the app bundle is available on the Android device.

Additional Tips

  • Use a network analyzer tool: Use a network analyzer tool to troubleshoot network connectivity issues.
  • Check the server logs: Check the server logs to ensure that the server is running and accessible.
  • Verify the app bundle file: Verify that the app bundle file is correctly named and has the correct file extension.

Conclusion

In conclusion, the error "Failed to connect to /address:3000" is caused by the inability to connect to the PC host, resulting in an error message indicating that the app bundle is unavailable. By verifying the server configuration, checking network connectivity, and verifying app bundle availability, the issue can be resolved.