503
Server Error
503 Service Unavailable
The server is temporarily unable to handle the request.
Description
The 503 Service Unavailable status code indicates that the server is currently unable to handle the request due to temporary overload or scheduled maintenance. The response may include a Retry-After header indicating when the service is expected to be available.
Common Causes
- Server maintenance
- Server overload
- Application deployment in progress
- Rate limiting at infrastructure level
- Resource exhaustion (CPU, memory, connections)
How to Fix
- Wait and retry the request
- Check server status page
- Scale server resources
- Implement graceful degradation
- Set up load balancing
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