Internal Server Error
Server Error (5xx)The 500 Internal Server Error status code indicates that the server encountered an unexpected condition that prevented it from fulfilling the request. It is a generic catch-all for server-side errors that do not fit a more specific 5xx code. The error is on the server side, not the client. Check server logs for the actual error details.
What is HTTP 500 Internal Server Error?
HTTP 500 Internal Server Error is a server error (5xx) status code. The 500 Internal Server Error status code indicates that the server encountered an unexpected condition that prevented it from fulfilling the request. It is a generic catch-all for server-side errors that do not fit a more specific 5xx code. The error is on the server side, not the client. Check server logs for the actual error details. Common causes include unhandled exception in application code and database connection failure. To fix it, check server logs for the actual error message and stack trace.
Example Response
HTTP/1.1 500 Internal Server Error
Content-Type: application/json
{"error": "An unexpected error occurred"} Common Causes
- • Unhandled exception in application code
- • Database connection failure
- • Misconfigured server or application
- • Out of memory or disk space
- • Third-party service dependency failure
How to Fix
- 1. Check server logs for the actual error message and stack trace
- 2. Verify database connections and credentials
- 3. Review recent code deployments for regressions
- 4. Check server resource usage (memory, disk, CPU)
- 5. Test the endpoint in a development environment
Frequently Asked Questions
How do I debug a 500 error?
Start with the server logs — they contain the actual error. Check application logs, web server error logs (nginx/Apache), and system logs. In development, enable stack traces in error responses. In production, use error monitoring tools like Sentry.
Is a 500 error always the server's fault?
Yes, by definition. 500 indicates a server-side issue. If the problem is with the client's request, the server should return a 4xx error instead. However, a poorly written server might return 500 for what should be a 400.
Should I show error details to users?
Never expose internal error details (stack traces, database queries) in production. Return a generic error message to clients and log the details server-side. Exposing internals is a security risk.