@Override
    protected void onStreamError(ChannelHandlerContext ctx, boolean outbound, Throwable cause,
                                 StreamException http2Ex) {
        logger.debug("{} HTTP/2 stream error:", ctx.channel(), cause);
        super.onStreamError(ctx, outbound, cause, http2Ex);
    }
Returns {@code true} if {@link ChannelHandlerContext#close()} has been called.
core/src/main/java/com/linecorp/armeria/internal/common/AbstractHttp2ConnectionHandler.java