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508
Server Error

508 Loop Detected

The server terminated an operation because it encountered an infinite loop (WebDAV).

Description

508 Loop Detected is a WebDAV status code (RFC 5842) indicating that the server terminated an operation because it encountered an infinite loop while processing the request. This can occur with Depth: Infinity requests on WebDAV collections that contain circular references.

Common Causes

  • WebDAV COPY/MOVE with Depth: Infinity on a circular directory structure
  • Recursive server-side includes or templates
  • Circular references in linked data structures processed server-side

How to Fix

  • Remove circular references from the directory or data structure
  • Use Depth: 0 or Depth: 1 instead of Infinity for WebDAV operations
  • Add cycle detection to server-side recursive processing
  • Review the data structure for unexpected circular links

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Related Status Codes

500
500 Internal Server Error
The server encountered an unexpected condition that prevented it from fulfilling the request.
 501
501 Not Implemented
The server does not support the functionality required to fulfill the request.
 502
502 Bad Gateway
The server received an invalid response from an upstream server.
 503
503 Service Unavailable
The server is temporarily unable to handle the request.
 504
504 Gateway Timeout
The server did not receive a timely response from the upstream server.
 505
505 HTTP Version Not Supported
The server does not support the HTTP protocol version used in the request.

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