Logo
DevUtilsAll-in-one toolkit
Back to all codes
5065xx
5xx — Server Error

Variant Also Negotiates

The server has an internal configuration error: the chosen variant resource is configured to engage in transparent content negotiation itself.

What it means

The HTTP 506 Variant Also Negotiates status code indicates an internal server configuration error where the content negotiation process results in a circular reference loop. This happens when a variant resource is misconfigured to act as a negotiator endpoint itself.

How it works

  • 1The client asks the server for a page in French (`Accept-Language: fr`).
  • 2The server looks at its internal negotiation configuration file.
  • 3The configuration erroneously routes that request back into another negotiation endpoint instead of a static asset file, generating an infinite loop loop.
  • 4The server catches the loop flag and stops it with a 506 error.

Why you're seeing this

  • • A structural configuration error inside your server's content type or localization maps.

How to fix it

  • • Audit server-side language routing maps (`mod_negotiation` profiles or equivalent framework localization parameters).
  • • Ensure all matching variant options map to direct static endpoints or distinct final templates.

Framework Implementations

Apache Configuration

# Ensure transparent content negotiation is configured without circular loops
# Fix typos in your type-map handler configuration maps
AddHandler type-map .var

Real-Life Scenarios

Do not manually throw this unless you are building an advanced content-negotiation engine or proxy router.

Misconfigured Multi-Language Routing Loops

An Apache server uses advanced Content Negotiation (`mod_negotiation`). A typo in the `.var` map file points a specific language file back onto the parent rule handler.

HTTP Transaction

1. Client Request

GET /about HTTP/1.1
Host: example.com
Accept-Language: es

2. Server Response

HTTP/1.1 506 Variant Also Negotiates
Content-Type: text/plain

An internal configuration error occurred: content negotiation loop detected.

SEO Implications

Extremely bad if it breaks localized paths. It prevents crawlers from reaching translated versions of your application.

Related Codes

406500