I am trying to send request with empty header value but somehow the responce is retrieved as if the value is added
But on Postman it works so how can i add empty value in the...
That blank seems normal as it is expected by the RFC and looking at browser requests it's also there.
Are you sure that your request does not have the same behavior in NeoLoad...
After recording testing in IE, the NeoLoad only can capture the links in IE, cannot capture the links after Oracle Application pops up(Java Web Start (JWS)).