Event ID 52 — HTTP Service Parsing Failures (HTTP 4xx class) Functionality

Applies To: Windows Server 2008

A parsing failure results from a client application (4xx) that sends an HTTP request that is not valid.

Event Details

Product: Windows Operating System
ID: 52
Source: Microsoft-Windows-HttpEvent
Version: 6.0
Message: Parsing of request (request ID %2) failed due to reason: %3. Request may not be compliant with HTTP/1.1.


Modify client application to be compliant with HTTP/1.1

With a parsing failure, the client application might not be sending an HTTP/1.1-compliant HTTP request. For example, a parsing failure might result from a client application sending an HTTP request that lacks a HostHeader. The client application should be modified to send a compliant HTTP request.


If parsing has failed because of a 4xx error, there will be a ParseRequestFailed error in your HTTPERR log at the following directory:


If there is no ParseRequestFailed error present, the parser has not failed.

HTTP Service Parsing Failures (HTTP 4xx class) Functionality