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500, 502 & 503 Errors, Diagnosed and Fixed

one-time fix, quoted upfront · or from ₹2,999/mo Engineers online now

5xx errors take your site offline and cost you money every minute they last. Our engineers find the exact root cause in your logs, instead of restarting services and hoping, and fix it so it doesn’t come back next week.

One-off price₹1,999 + 18% GSTFixed starting price · paid securely via Razorpay, UPI or card · GST invoice
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What’s included

Web server, PHP-FPM, database and system log analysis
Service and resource checks (CPU, RAM, disk, connections)
Nginx / Apache / .htaccess configuration review
PHP-FPM pool sizing for your traffic
Plugin / theme conflict isolation
Database connection and max_connections fixes
Upstream timeout tuning (Nginx ↔ PHP-FPM / Node.js)
Written report: cause, change, prevention

What each error is telling you

A 5xx error means the problem is on your server, and each code points to a different kind of failure.

500 · Internal Server ErrorSomething failed while processing the request. The real cause is always in the logs.
  • PHP fatal or syntax error
  • Corrupted .htaccess
  • Plugin or theme conflict
  • PHP memory limit reached
  • File permission error
502 · Bad GatewayA proxy got an invalid response from the backend. Common with Nginx + PHP-FPM.
  • PHP-FPM crashed or overloaded
  • Backend app server down
  • Proxy ↔ backend timeout
  • RAM / CPU exhaustion
  • Database connection failure
503 · Service UnavailableThe server can’t handle the request right now: overloaded, stopped or in maintenance.
  • Too many requests / traffic spike
  • Web server stopped
  • Maintenance mode left on
  • Connection limit reached
  • Database unavailable

How it works

Logs firstWeb server, PHP-FPM, database and system logs are read before anything is changed, to find the actual error behind the HTTP code.
Services and resourcesEvery relevant service is checked, along with CPU, RAM, disk and connection usage.
Configuration reviewNginx / Apache, PHP-FPM pools, .htaccess and app config checked for recent breaking changes.
Root-cause fixThe specific cause is fixed: memory limit, pool size, .htaccess repair, plugin rollback or database fix.
Prevent recurrenceCapacity adjusted or the faulty component isolated, so the same error doesn’t return.
ReportA short written summary: what broke, why, what we changed and what we recommend.

Service FAQ

Don’t restart services blindly: that wipes useful evidence. Send us your server IP and we start straight away. If you must act first, check the PHP or web server error log (e.g. /var/log/nginx/error.log) for the real message.

A 500 comes from the web server or application itself failing. A 502 means a proxy (like Nginx) got a bad response from a backend such as PHP-FPM or Node.js. They need different diagnosis.

Yes. Intermittent errors are usually capacity or timeout problems, such as an undersized worker pool. We correlate logs over time to catch the pattern.

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