# 5 Railway.io Config Mistakes That Silently Break Deployments (And How to Fix Them)

Five common mistakes when configuring applications on Railway can lead to frustrating deployment issues due to unclear error messages from the platform. Here’s a breakdown of these errors along with their symptoms and solutions:

1. Hardcoded PORT: If your application is unreachable, it might be because you have hardcoded the port instead of using process.env.PORT. Ensure that your app reads the environment variable for the correct port.

2. Invalid builder: Configurations that specify an invalid builder (like using "npm" instead of supported values like "nixpacks", "dockerfile", or "heroku") can cause silent build failures. Always use one of the officially supported builders to avoid this issue.

3. No restart policy: When a service crashes and does not automatically restart, it indicates that you have not set an appropriate restartPolicyType. Adding ON_FAILURE ensures your application will restart after a failure but won't unnecessarily restart during normal shutdowns.

4. Bad healthcheckPath: If your application gets stuck in a loop of restarting without any clear reason, the issue might be with your health check path definition. Ensure that it starts with /, and make sure this route exists within your application code to return a

Read the full article at DEV Community

---

Want to create content about this topic? Use Nemati AI tools to generate articles, social posts, and more.