can't get netty channel pool to work with the snoop example

[ngp lah]

    // Configure the client.
    EventLoopGroup group = new NioEventLoopGroup();
    try {
        Bootstrap b = new Bootstrap();
        //b.group(group)
        //        .channel(NioSocketChannel.class)
        //        .handler(new HttpSnoopClientInitializer(sslCtx));
        //
        //// Make the connection attempt.
        //Channel ch = b.connect(host, port).sync().channel();

        b.group(group).channel(NioSocketChannel.class).handler(new HttpSnoopClientInitializer(sslCtx)).remoteAddress(host, port);
        CountingChannelPoolHandler handler = new CountingChannelPoolHandler(); // CountingChannelPoolHandler is copied from netty test!
        SimpleChannelPool pool = new SimpleChannelPool(b, handler);
        Channel ch = pool.acquire().sync().getNow();

        // Prepare the HTTP request.
        HttpRequest request = new DefaultFullHttpRequest(
                HttpVersion.HTTP_1_1, HttpMethod.GET, uri.getRawPath());
        request.headers().set(HttpHeaderNames.HOST, host);
        request.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.CLOSE);
        request.headers().set(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.GZIP);

        // Set some example cookies.
        request.headers().set(
                HttpHeaderNames.COOKIE,
                ClientCookieEncoder.STRICT.encode(
                        new DefaultCookie("my-cookie", "foo"),
                        new DefaultCookie("another-cookie", "bar")));

        // Send the HTTP request.
        ch.writeAndFlush(request);

        // Wait for the server to close the connection.
        ch.closeFuture().sync();
    } finally {
        // Shut down executor threads to exit.
        group.shutdownGracefully();
    }

I have posted this question on SO, but few of them get reply, so I post my question here.

I use the snoop client of netty example in netty source code for testing.

I make some changes to the HttpSnoopClient class to get channel from channel pool instead of getting it from Bootstrap, But that doesn't work for me.

I have searched solution for one day, but I can still not get one. Please tell me If you have any idea.

[Norman Maurer]

What does not work mean ?

Please give a few more details. Also what does the ChannelFuture for the writeAndFlush operations tell you ?

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[ngp lah]

The ChannelFuture for the writeAndFlush tells DefaultChannelPromise@52d10fb8(failure: java.lang.UnsupportedOperationException: unsupported message type: DefaultFullHttpRequest (expected: ByteBuf, FileRegion)).

I want the handler print the http response of the http request if it works.