How To Fix Python/NodeJS Apps Cannot Upload Files Cloudlinux Cpanel

📤 Issue: Node.js Apps Unable to Upload Large Files (Only Few KB Allowed)

If you're running Node.js apps via CloudLinux + cPanel, you might face an issue where file uploads fail or hang for files larger than a few kilobytes.

⚠️ Symptoms:

• Uploads of small files (e.g. < 10 KB) work fine

• Larger uploads fail silently or with timeout

• No relevant errors in the Node.js app logs

• Happens specifically when using Phusion Passenger (via Node.js Selector)

🌐 Environment:

• ✅ CloudLinux OS

• ✅ Node.js Selector

• ✅ Phusion Passenger (via ea-ruby27-mod_passenger)

• ❌ File uploads fail for large files

✅ Solution: Update Required Passenger Packages

The issue is typically caused by outdated versions of ea-ruby27-libuv or ea-ruby27-mod_passenger.

To fix it, update both packages to the latest version.

📦 Run This Command as Root:

This will install the latest bug-fixed versions that improve upload buffer handling and request parsing, especially for larger files.

🔁 Optional: Restart Apache

After updating, restart Apache to apply changes:

🧪 After the Fix:

• Retry uploading files > 1MB from your Node.js application

• Confirm that uploads now succeed without timeout or errors