Fix ConnectionError Error in Swift — In Production

What Is the ConnectionError Error?

The ConnectionError error in Swift can be frustrating to debug. Let's break down what causes it and how to resolve it quickly.

Why It Happens

This error indicates a failed network connection — typically caused by incorrect URLs, DNS issues, or the server being unreachable. In production, this is often triggered by environment differences between local and deployed setups.

The Fix

async function fetchWithRetry(url, retries = 3) {
  for (let i = 0; i < retries; i++) {
    try {
      return await fetch(url);
    } catch (err) {
      if (i === retries - 1) throw err;
      await new Promise(r => setTimeout(r, 1000 * (i + 1)));
    }
  }
}

Common Mistakes to Avoid

Many developers make the mistake of silently catching this error without logging it, which makes debugging much harder later. Another common pitfall is applying a fix that works locally but fails in production due to environment differences. Always verify your fix works in a staging environment before deploying. Additionally, ensure your error handling doesn't mask the original error — preserve the stack trace and error message for future debugging sessions.

Prevention

With [Bugsly](https://bugsly.dev), you can monitor for this error in production and get alerted with full error context.

Key Takeaways

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