Internal Server Error

noreply@example.com (AG Sayyed) — Thu, 13 Nov 2025 11:15:36 +0000

This document walks through debugging a web server returning HTTP 500 errors, demonstrating systematic investigation of logs, configuration files, running processes, and file permissions to identify and resolve the root cause.

Introduction

When a web server returns an HTTP 500 Internal Server Error, the root cause typically lies on the server side. This requires systematic investigation of logs, configurations, running processes, and system resources to identify the issue.

Initial Investigation

Reproducing the Error

The first step is to confirm the error by accessing the failing webpage. An HTTP 500 response indicates a server-side crash or misconfiguration, but provides no details about the underlying cause.

Troubleshooting Slow Web Server

noreply@example.com (AG Sayyed) — Tue, 11 Nov 2025 18:22:24 +0000

This document walks through a real-world web server performance investigation, from initial user report to resolution. It demonstrates using Apache Benchmark for performance measurement, analyzing process loads with top, adjusting process priorities, investigating script automation, and implementing sequential processing to eliminate CPU overload.

Initial Problem Report and Verification