@Override
  public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
    http2ServerMetrics.http2StreamExceptionCount.inc();
    logger.warn("Exception caught for channel {} in AmbryNetworkRequestHandler", ctx.channel(), cause);
    ctx.channel().close();
  }
Retain content of {@link FullHttpRequest} and send to {@link RequestResponseChannel}.
ambry-network/src/main/java/com/github/ambry/network/http2/AmbryNetworkRequestHandler.java