io.sockets.on('connection', function (socket) {
    console.log('channel:--->' + 'lonso' + io.sockets.clients().length );
    socket.on('disconnect', function(){
        console.log('disconnect.........................' + io.sockets.clients().length);
    });
    redis_client.subscribe('lonso' + io.sockets.clients().length );
    redis_client.on('message',
        function (channel, message) {
            console.log("server 1 channel:" + channel + ", msg:" + message);
            socket.disconnect();
        }
    );

}); //Sub

for(var i=1; i<=5; i++) {
  client.publish('lonso' + i,"test,i am test");
} //pub

在pub的时候sub订阅的频道会收到5次消息。怎么回事？