Netty 10000 同时连接

Question

我正在尝试使用 Netty 模拟 10000 个客户端同时连接到服务器。当 956 客户端连接到服务器时一切正常，但 957 客户端导致错误异常。

注意：我是运行服务器和客户端在同一台机器上(win7 8GB ram, i7-CPU)

错误：

java.lang.IllegalStateException: failed to create a child event loop
io.netty.channel.ChannelException: failed to open a new selector

我的代码：

try {
        con.connect();
    } catch (Exception e) {
        logger.error("Client: error connect to ip {} and port {}, ",id, ip, port,e);
        return;
    }

connect方法的代码是：

public void connect() {
    workerGroup = new NioEventLoopGroup();
    Bootstrap bs = new Bootstrap();
    bs.group(workerGroup).channel(NioSocketChannel.class);
    bs.handler(new ChannelInitializer<SocketChannel>() {
        @Override
        protected void initChannel(SocketChannel ch) throws Exception {
            ch.pipeline().addLast("idleStateHandler", new IdleStateHandler(0, 0, 300));
            ch.pipeline().addLast("idleStateActionHandler", new IdleStateEventHandler());
            ch.pipeline().addLast("logger", new LoggingHandler());
            ch.pipeline().addLast("commandDecoder", new CommandDecoder());
            ch.pipeline().addLast("commandEncoder", new CommandEncoder());
        }
    });

Answer 1

您应该为每个连接调用使用相同的 NioEventLoopGroup 实例。否则你会创建很多线程。

Netty 10000 同时连接

Netty 10000 connections at the same time

java

netty