AH00568
client sent invalid HTTP/0.9 request: HEAD aa....aa
Description
The request processing could not continue because the client has sent an invalid HTTP/0.9 request (HEAD requested URI value).
The status code 400 Bad Request will be returned to the client, and the request processing will be interrupted.
Error level: info
Action
Sending requests using the HEAD method is enabled for HTTP protocol 1.0 or later. Ensure that the HTTP protocol string is included when sending the request using the HEAD method.