HTTP2 defaulting to HTTP/1.1

Question

I am trying to setup a apache load balancer to handle HTTP2 connections, However the incoming connections default to HTTP/1.1 The strange thing is this is happening only when the HTTP2 connection originates from netty HTTP2 library, when the request originates from OKHTTP library it goes through fine.

The SSLCipherSuite i am using

SSLCipherSuite ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM- 
SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128- 
SHA256:ECDHE-RSA-AES128-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256- 
SHA256:AES128-SHA256:AES256-SHA:AES128-SHA

The Error seen with netty is

io.netty.handler.codec.http2.Http2Exception: First received frame was not SETTINGS. Hex dump for first 5 bytes: 485454502f at io.netty.handler.codec.http2.Http2Exception.connectionError(Http2Exception.java:85) at io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.verifyFirstFrameIsSettings(Http2ConnectionHandler.java:350)

Answer 1

github.com/netty/netty/issues/8717 The solution is the above link it was a apache config info. H2Direct on