/*
 * Copyright 2011 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.example.echo;

import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoop;
import io.netty.channel.ServerChannelBuilder;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.SelectorEventLoop;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

import java.net.InetSocketAddress;

/**
 * Echoes back any received data from a client.
 */
public class EchoServer {

    private final int port;

    public EchoServer(int port) {
        this.port = port;
    }

    public void run() throws Exception {
        // Create the required event loops.
        EventLoop parentLoop = new SelectorEventLoop();
        EventLoop childLoop = new SelectorEventLoop();
        try {
            // Configure the server.
            ServerChannelBuilder b = new ServerChannelBuilder();
            b.parentEventLoop(parentLoop)
             .parentChannel(new NioServerSocketChannel())
             .parentOption(ChannelOption.SO_BACKLOG, 24)
             .localAddress(new InetSocketAddress(port))
             .childEventLoop(childLoop)
             .childOption(ChannelOption.TCP_NODELAY, true)
             .childInitializer(new ChannelInitializer() {
                 @Override
                 public void initChannel(Channel ch) throws Exception {
                     ChannelPipeline p = ch.pipeline();
                     p.addLast("logger", new LoggingHandler(LogLevel.INFO));
                     p.addLast("echoer", new EchoServerHandler());
                 }
             });

            // Start the server.
            ChannelFuture f = b.bind().sync();

            // Wait until the server socket is closed.
            f.channel().closeFuture().sync();
        } finally {
            // Shut down all event loops to terminate all threads.
            parentLoop.shutdown();
            childLoop.shutdown();
        }
    }

    public static void main(String[] args) throws Exception {
        int port;
        if (args.length > 0) {
            port = Integer.parseInt(args[0]);
        } else {
            port = 8080;
        }
        new EchoServer(port).run();
    }
}

@@ -1823,10 +1823,11 @@
 OG, 
-24
+100
 )%0A  

Bump up the backlog value