Error Message: HTTP 414 - Request - URI Too Long

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Article ID: 248061
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When you connect to Internet Information Services (IIS) through a browser, you may receive the following error message:
HTTP 414 - Request - URI Too Long


The server is refusing to service the request because the Request-URI is too long. This rare condition is likely to occur in the following situations:
  • A client has improperly converted a POST request to a GET request with long query information.
  • A client has encountered a redirection problem (for example, a redirected URL prefix that points to a suffix of itself).
  • The server is under attack by a client attempting to exploit security holes present in some servers that use fixed-length buffers to read or manipulate the Request-URI.
IIS checks the string length of the URI and does not service a request when the URI is longer than expected. This is by design.


Article ID: 248061 - Last Review: June 19, 2014 - Revision: 3.0
kbprb KB248061
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

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