EC
500
HTTPSERVER_ERRORCritical5xx Server ErrorHIGH confidence

Internal Server Error

Production Risk

High. This error means a critical part of your server-side logic has failed. It can disrupt service for all users and indicates a serious underlying problem that needs immediate investigation.

What this means

A generic error message, given when an unexpected condition was encountered on the server and no more specific message is suitable. This error indicates a problem with the server itself, not the request.

Why it happens
  1. 1A bug in the server-side application code leads to an unhandled exception.
  2. 2A misconfiguration in the server environment (e.g., incorrect database credentials).
  3. 3The server is overloaded and cannot handle the request.
  4. 4A failure in a backend service, like a database or another API, that the server depends on.
How to reproduce

A web application attempts to query a database that is offline, causing an unhandled exception in the code.

trigger — this will error
trigger — this will error
GET /some-api-endpoint HTTP/1.1
Host: api.example.com

expected output

HTTP/1.1 500 Internal Server Error

Fix 1

Check Server Logs

WHEN This error occurs.

Check Server Logs
tail -f /var/log/apache2/error.log
# or journalctl -u my-app.service

Why this works

Debugging

Fix 2

Implement Error Handling

WHEN Developing the application.

Implement Error Handling
try {
  // Risky database operation
} catch (error) {
  log.error("Database failed:", error);
  res.status(503).send("Service Unavailable");
}

Why this works

Defensive Programming

What not to do

✕

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