Railway: deployment failing silently [2026 fix]

Railway deployments fail silently when build logs aren't checked; enable verbose logging and validate Procfile syntax.

Railway: Deployment Failing Silently [2026 Fix]

TL;DR

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Real Console Error Messages

Here are the exact outputs you'll see in Railway's deployment logs:

``` [RAILWAY] Build completed successfully (0 errors) [RAILWAY] Deployment status: running [RAILWAY] Health check failed after 60s - no response from :3000 ```

``` Command "npm start" exited with code 137 ```

``` [RAILWAY] Port 3000 was never opened. Waiting for port... [RAILWAY] Timeout waiting for service health check ```

``` Error: Cannot find module 'express' at Function.Module._resolveFilename ```

``` [RAILWAY] Process died: SIGKILL (exit code 137) [RAILWAY] Attempting restart... max retries exceeded ```

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The Problem: Broken Code vs. Fixed Code

Scenario 1: Missing or Malformed Procfile

BROKEN: ```procfile web: npm start worker node worker.js ``` *(missing colon after "worker")*

FIXED: ```procfile web: npm start worker: node worker.js ```

Scenario 2: Build Steps Succeed, Runtime Fails

BROKEN: ```json { "name": "my-app", "scripts": { "start": "node index.js" }, "engines": { "node": "16.x" } } ``` *(Node 16 reaches end-of-life in September 2023; Railway will use fallback and exit silently)*

FIXED: ```json { "name": "my-app", "scripts": { "start": "node index.js" }, "engines": { "node": "20.x" } } ```

Scenario 3: Port Not Exposed Correctly

BROKEN: ```javascript const app = require('express')(); app.listen(3000, 'localhost'); ``` *(Railway's health check hits 0.0.0.0 by default, not localhost)*

FIXED: ```javascript const app = require('express')(); const PORT = process.env.PORT || 3000; app.listen(PORT, '0.0.0.0'); ```

Scenario 4: Environment Variable Not Set

BROKEN: ```javascript const dbUrl = process.env.DATABASE_URL; const client = new Pool({ connectionString: dbUrl }); ``` *(Railway doesn't auto-inject unless service is linked)*

FIXED: ```bash

In Railway dashboard: Variables tab

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Step-by-Step Debug Process

1. Enable Debug Logging (Required first step): - Go to Railway Dashboard → Your Project → Variables - Add: RAILWAY_LOG_LEVEL=debug - Redeploy

2. Check Procfile Syntax: ```bash # Validate format: processname: command cat Procfile # Should show: web: npm start ```

3. Verify Port Binding: ```bash # Run locally to confirm PORT=3000 npm start # Test: curl http://localhost:3000 ```

4. Review Build Logs: - Railway Dashboard → Deployment → Logs tab - Scroll to bottom for actual crash reason

5. Check Memory & CPU: - If logs show SIGKILL (exit 137), your app is out of memory - Railway free tier: 512MB RAM - Upgrade plan in Settings → Pricing

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Still Broken? Check These Too

1. Dependency Not Installed

2. Build Script Failing Silently

3. Health Check Timeout

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Version Specific Notes

I am uncertain about: Whether Railway still applies the legacy Node 16 fallback in 2026; their EOL policy may have changed. Check [official Railway docs](https://docs.railway.app) under "Runtimes → Node.js" for current supported versions.

The RAILWAY_LOG_LEVEL=debug variable behavior is consistent as of Railway CLI v3.x, but verify this matches your current version with railway version.

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Prevention Checklist

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Found a different variation? Drop it in the comments below—we'll add it to this guide.