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Technology – 404 Error

Reasons why a 404 error code was received for an HTTP request.

404 is one of the standard status codes in Hypertext Transfer Protocol. It tells a web user that a requested page is not available. 404 error codes generate when a user attempts to access a webpage that does not exist or has a dead or broken link. The 404 code means that a server could not find a client-requested webpage. The error code is one of the most frequent errors a web user encounters. It messes up a user’s online experience. A user can face 404 in a variety of ways. It may happen that they are following a link that itself leads to a 404. A bookmark may lead to a dead-end. 404 links also appear on other websites or through search engines.

404 Error
  Access issue 

  •   Redirected incorrectly
  •   Page deleted
  •   Page moved

URL issue

  •   Non-existent domain name
  •   Incorrect “friendly URLs” path
  •   Disabled URL rewriting mode (mod_rewrite)
  •   Incorrect link/ Misspelled URL

Config issue

  •   Problem in .htaccess file
  •   Wrong SSL certificate configuration

Memory issue

  •   Memory limit on hosting

Permission issue

  •   Authorization problem

Other issue

  •   Intentional illegal content blocking
  •   Malfunctioning server
  •   URL submitted for indexing

A thorough root cause analysis helps us identify the main reasons for the 404 error. This fishbone template holds the causes for which a server replies back with 404. The parent or first-level causes represent different cause categories.

Who should use the 404 Error template?

  • Anyone who needs to understand the potential causes for getting 404 Error – Page Not Found from HTTP requests / URLs in the browser

Why use this template?

  • Recognize reasons why a 404 Error has occurred
  • Change and reuse this template using smartQED
  • Create your own templates for any type of problem analysis in smartQED

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