Fix Connection Refused Error in Ruby

What Is the Connection Refused Error?

Seeing Connection Refused pop up in your Ruby application? This guide covers the cause and a proven fix.

Why It Happens

This happens when the target server isn't running, the port is wrong, or a firewall is blocking the connection.

The Fix

require 'net/http'

begin
  uri = URI.parse("http://localhost:3000/api")
  response = Net::HTTP.get_response(uri)
rescue Errno::ECONNREFUSED => e
  Rails.logger.error "Connection refused: #{e.message}"
end

Related Errors

This error is often accompanied by other issues in your Ruby application. Check for related warnings in your console output that might provide additional context. Sometimes what appears to be a Connection Refused error is actually a symptom of a deeper configuration problem. Review your application's dependency versions to ensure compatibility, and check that all required environment variables are properly set in your deployment configuration.

Prevention

Set up [Bugsly](https://bugsly.dev) to catch this and similar errors in production with detailed stack traces and environment info.

If this error persists after applying the fix, try clearing all caches, restarting your development server, and verifying your Ruby version matches what's specified in your project configuration.

Remember that Connection Refused might manifest differently across browsers or runtime environments. Test your fix across multiple environments to ensure consistent behavior in your Ruby app.

Key Takeaways

• Always handle this error gracefully with proper error handling
• Check your environment configuration
• Test thoroughly before deploying to production