http/2 is not available before Java 8. ALPN and TLS 1.3 are requirements for h2.
I saw httpClient 5 implemented http/2. That's fine and that's why you may have successfully connected tomcat with a http/2 client. Try another application server which does not use httpClient, e.g. OpenLiberty. You will not be able to have a http/2 server side protocol support. I hope this helped for clarification. Thus, I consider my previous mail *not* nonsense. If maven didn't use httpClient (which I was not aware of at time of writing), my statement would have been true: just use Java 9+ and it will connect via http/2. I am sorry this caused confusion, but I did not like your response which did sound "aggressive" to me. I will therefore not contribute to this project soon. On Sun, 25 Oct 2020, 19:54 Michael Osipov, <micha...@apache.org> wrote: > Am 2020-10-25 um 19:09 schrieb Benjamin Marwell: > > While TLS 1.3 and ALPN (and ciphers) may have been backported, I am not > > aware of http2 being backported to Java 8. Even if it was, it would not > be > > part of EVERY JVM implementation, eg Eclipse OpenJ9. > > You are talking non-sense. Don't mix lower level protocols like TLS with > application protocols. Moreover, there is still h2c. > > Tomcat 8.5+ just works fine with h2 and h2c when connected via curl. > > > On Sun, 25 Oct 2020, 09:52 Michael Osipov, <micha...@apache.org> wrote: > > > >> Am 2020-10-24 um 14:25 schrieb Benjamin Marwell: > >>> You need at least java 9 for http/2. Java 11 is a current LTS release > >> which > >>> supports h2. > >> > >> Why? TLS 1.3 and ALPN have been backported to Java 8 recently. > >> > >>> Is there anything in the transport code preventing h2 transport? > >> > >> Yes, your participation to do the work! > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > >> For additional commands, e-mail: users-h...@maven.apache.org > >> > >> > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > For additional commands, e-mail: users-h...@maven.apache.org > >
