5xx Server Error

HTTP 506 Variant Also Negotiates

The server has an internal configuration error: the chosen variant resource is configured to engage in content negotiation itself, resulting in a circular reference during negotiation.

Common Causes

  • Misconfigured content negotiation on the server
  • Circular reference in variant resource configuration
  • Transparent content negotiation failure

How to Fix

  1. 1Fix the server's content negotiation configuration
  2. 2Remove circular references in variant mappings
  3. 3Simplify content negotiation rules

Example

HTTP 506 Variant Also Negotiates
GET /page HTTP/1.1
Accept: text/html

→ 506 Variant Also Negotiates
→ Server variant creates a negotiation loop

Related Server Error Codes

500

Internal Server Error

501

Not Implemented

502

Bad Gateway

503

Service Unavailable

504

Gateway Timeout

505

HTTP Version Not Supported

507

Insufficient Storage

508

Loop Detected

510

Not Extended

511

Network Authentication Required