Some of Connection Keep ESTABLISH for hours,Can any one help?

[Lookis]

Hello all
I've got a problem with my statistical server,some of the connection from
client didn't close up ,and keep ESTABLISH for a very long time.

my server is only for statistics,return "204 No Content" and simply close
the Channel, every thing is OK on my computer's browse ,when i put it on the
server and simulate the real visit from internet, most requests work
fine,only few of the request keeps ESTABLISH status,as time goes by,more and
more Connection become ESTABLISH until the ulimit was hit

i disconnect the "204 Server" from load balance ,and found the ESTABLISH
Channel keeps for a very long time(2 hour or 3 or 4...)

is this a bug in my code or in netty?

here is mine
=============
@ChannelPipelineCoverage("all")
public class HttpNoContentServer extends SimpleChannelUpstreamHandler {

    @Override
    public void messageReceived(ChannelHandlerContext ctx, MessageEvent e)
throws Exception {
        HttpResponse response = new
DefaultHttpResponse(HttpVersion.HTTP_1_1,
                HttpResponseStatus.NO_CONTENT);
        response.addHeader(HttpHeaders.Names.SERVER, "wsep");
        response.addHeader(HttpHeaders.Names.CONTENT_LENGTH, "0");
        response.addHeader(HttpHeaders.Names.CONNECTION,
HttpHeaders.Values.CLOSE);
        try {
            ChannelFuture future = e.getChannel().write(response);
            future.addListener(ChannelFutureListener.CLOSE);
        } catch (Exception e1) {
            System.err.println("check throw again?");
            throw new Exception("my exception", e1);
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
throws Exception {
        e.getCause().printStackTrace();
        try {
            e.getChannel().close();
        } catch (Exception e1) {
            System.err.println("Exception throws when trying to close a
channel!");
            e1.printStackTrace();
            e.getChannel().close();
            e.getChannel().disconnect();
        } finally {

        }
    }
}
==================
and my server
==================
    public static void main(String[] args) {
        int port = 8080;
        if (args.length > 0) {
            port = Integer.parseInt(args[0]);
        }
        // Configure the server.
        ServerBootstrap bootstrap = new ServerBootstrap(new
NioServerSocketChannelFactory(Executors
                .newCachedThreadPool(), Executors.newCachedThreadPool()));
        // Set up the event pipeline factory.
        bootstrap.setPipelineFactory(new HttpServerPipelineFactory());
        bootstrap.bind(new InetSocketAddress(port));
        System.out.println("Server listen on port:" + port);
    }
===================
and my factory
===================
public class HttpServerPipelineFactory implements ChannelPipelineFactory {

    public ChannelPipeline getPipeline() throws Exception {
        ChannelPipeline pipeline = pipeline();
        pipeline.addLast("decoder", new HttpRequestDecoder());
        pipeline.addLast("encoder", new HttpResponseEncoder());
        pipeline.addLast("nocontent", new HttpNoContentServer());
        return pipeline;
    }
}
====================

thx.
-- 
View this message in context: http://n2.nabble.com/Some-of-Connection-Keep-ESTABLISH-for-hours-Can-any-one-help-tp4082485p4082485.html
Sent from the Netty User Group mailing list archive at Nabble.com.