Fixing ProcessError: error: RPC failed When Deploying React Apps to GitHub Pages

Learn how to resolve the RPC failed HTTP 400 error when deploying React applications to GitHub Pages using the gh-pages package.
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This video is based on the question https://stackoverflow.com/q/79110752/ asked by the user 'Tinu Jos K' ( https://stackoverflow.com/u/11564070/ ) and on the answer https://stackoverflow.com/a/79347718/ provided by the user 'user482401' ( https://stackoverflow.com/u/9501468/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Deployment Error

When deploying a React app to GitHub Pages using the gh-pages package, you might encounter the following error:

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This typically happens during the npm run deploy process that runs gh-pages -d build, causing the deployment to fail despite having the correct remote URL and a moderately sized app.



Why Does This Happen?

The error is related to Git’s HTTP buffer size being too small to handle the data pushed during deployment. Although your project might be small, certain configurations or underlying issues can trigger this failure.



How to Fix the RPC failed Error

You can resolve this by increasing Git’s HTTP post buffer size and max request buffer globally:

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Explanation:

http.postBuffer controls the size of the buffer for POST requests.

http.maxRequestBuffer increases the maximum request size buffer.

Increasing these values gives Git enough room to process larger pushes over HTTP.



Additional Tips

Confirm that your local repository is clean and up-to-date before deploying.

Ensure your network connection is stable during deployment.

If the issue persists, try using SSH instead of HTTPS for the Git remote URL.



Summary

If you run into a ProcessError: error: RPC failed when deploying React apps to GitHub Pages, increasing Git’s global HTTP buffer sizes is a simple and effective fix:

[[See Video to Reveal this Text or Code Snippet]]

This should allow your deployment to complete without RPC disconnect errors, making your React portfolio or app live on GitHub Pages.