how can I send the disconnect messages to subscriibed clients if one client is disconnected in MQTT? : Hello All I tried client 1 and client 2 program I can able to easily communicate with them.I can easily send the messages and receive the messages with them.but I don't know if one client is disconnected, how can I send the disconnected message to subscribed clients.can anyone help me.I need urgently.Thanks in advance.I am waiting for your reply.

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

    client 1:


    var mqtt=require("mqtt");
    var express=require("express");
    var app=express();
    var options={
        keepalive:100,
        port: 1883,
        clientId:'1',
        clientSession:false,
        host: "http://localhost:8000",
        will:
            {
                topic:'willMag',
                payload:"connection closed abnormallly r",
                qos:1,
                retain:true
            }
    };
    var client=mqtt.connect("tcp://192.168.43.137:1883",options);
    client.on("connect",function()
    {
        setInterval(function()
        {
            client.publish("ranjith/princy","hello love you princy",function()
            {
                console.log("message published in client1");
            });
        },2000);
        client.subscribe("bv/nivi");
        client.on("message",function(topic,message)
        {
                console.log("I recieved the topic:"+topic);
                console.log("I recieved the message:"+message);
        });
    });
    client.on("disconnect",function()
    {
        console.log("disconnected client1");
    });
    app.listen(8000,function()
    {
        console.log("server listen at port 8000");
    });



    client 2:
    var mqtt=require("mqtt");
    var express=require("express");
    var app=express();
    var options={
        keepalive:100,
        port: 1883,
        clientId:'2',
        clientSession:false,
        host: "http://localhost:8086",
        will:
            {
                topic:'willMag',
                payload:"connection closed abnormallly b",
                qos:1,
                retain:true
            }
    };
    var client=mqtt.connect("tcp://192.168.43.137:1883",options);
    client.on("connect",function()
    {
        setInterval(function(){
            client.publish("bv/nivi","hello love you nivi",function()
            {
                console.log("message published in client2");
            });
        },2000);

        client.subscribe("ranjith/princy");

            client.on("message",function(topic,message)
            {
                console.log("I recieved the topic:"+topic);
                console.log("I recieved the message:"+message);
            });

    });
    client.on("disconnect",function()
    {
        console.log("disconnected client2");
    });
    app.listen(8086,function()
    {
        console.log("server listen at port 8000");
    });

















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