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.
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.
Curated from community experience and public sources: