ADDITIONAL SYSTEM INFORMATION :
openjdk 11.0.17 2022-10-18
OpenJDK Runtime Environment (build 11.0.17+8-post-Ubuntu-1ubuntu218.04)
OpenJDK 64-Bit Server VM (build 11.0.17+8-post-Ubuntu-1ubuntu218.04, mixed mode, sharing)

A DESCRIPTION OF THE PROBLEM :
I am using Java jdk11 HttpClient.

I am trying to manually provide host header for my HTTP requests. To enable this behaviour, I am settting
-Djdk.httpclient.allowRestrictedHeaders=host

Host header is not getting overriden when I make request to the HTTP 2 supporting server. The request I am using is:

    HttpRequest request =
        HttpRequest.newBuilder()
            .version(HttpClient.Version.HTTP_2)
            .uri(URI.create("https://httpbin.org/get"))
            .header("Host", "someHost")
            .GET().build();

Here the host does not get overriden to "someHost" and "httpbin.org" is sent as host in the request.

Whereas if I use HTTP 1.1 to make the same request, I works as expected:

    HttpRequest request =
        HttpRequest.newBuilder()
            .version(HttpClient.Version.HTTP_1_1)
            .uri(URI.create("https://httpbin.org/get"))
            .header("Host", "someHost")
            .GET().build();

Here the host header received by server is "someHost", which is expected behaviour.


FREQUENCY : always