about Netty 4 boss Thread do?

[you fu]

hi  all 

if the use the bloew code :

     // Configure the server.

        EventLoopGroup bossGroup = new NioEventLoopGroup(2);

        EventLoopGroup workerGroup = new NioEventLoopGroup(10);

        try {

            ServerBootstrap b = new ServerBootstrap();

            b.group(bossGroup, workerGroup)

             .channel(NioServerSocketChannel.class)

             .option(ChannelOption.SO_BACKLOG, 100)

             .handler(new LoggingHandler(LogLevel.INFO))

             .childHandler(new ChannelInitializer<SocketChannel>() {

                 @Override

                 public void initChannel(SocketChannel ch) throws Exception {

                     ch.pipeline().addLast(

                             new NettyEncoder(),

                             new LineBasedFrameDecoder(8192),

                             new StringDecoder(CharsetUtil.UTF_8),

                             new FileHandler());

                 }

             });

            // Start the server.

            ChannelFuture f = b.bind(port).sync();

            // Wait until the server socket is closed.

            f.channel().closeFuture().sync();

the boss thread is 2 ,two boss threads  both contention accept cleint socket ? what's the boss thread do? 

[yuanjun Li]

according to the source code, I think only one boss thread would be started.

AbstractBootstrap.initAndRegister

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[Norman Maurer]

Yeah the boss group is only used for accept etc and for each ServerChannel only one Thread is used. So if you only call bind(...) one time only one of the Threads out of it will be used.