使用websocket和nodejs时，文件描述符号会增加

Question

我在5001使用Websocket库ws npm，在端口80通信使用nodejs。

我的问题是在一段时间内文件描述符数量增加导致更多的RAM消耗。

以下是我的代码。

var SOCKETS = [];

//Used for publish URL
var app = https.createServer(options, function(req, response){
   log.debug("connection:"+ req.url);
   var path = url.parse(req.url,true).pathname;
   log.debug('path:'+path);
   //response.writeHead(200,{ 'Content-Type': 'text/html' });
   switch(path){
            case '/push':
                
                client.send(user_message);

                response.writeHead(200,{ 'Content-Type': 'text/json' });
                response.write(JSON.stringify({ 'userids': valid_users}));
                break;
   }
   // Send HTML headers and message
   response.end('');

});

app.listen(config.websocket_port);

var WebSocketServer = require('ws').Server
  , wss = new WebSocketServer({ server: app } );

wss.on('connection', function(ws) {
    ws.on('message', function(userid) {
        ws.userid = userid;
        if(SOCKETS[userid]){
            delete SOCKETS[userid];
        }
        SOCKETS[userid] = ws;
        log.debug("Userid: " + userid.toString() + " connected");
    });

    ws.on('close', function(){
       log.debug(" Socket with userid closed ", ws.userid);
       var userid = ws.userid;
       if(SOCKETS[userid] == ws){
           SOCKETS[userid] = null;
       }
       delete SOCKETS[userid];
    });

    ws.on('error', function(){
        log.debug(" Socket error ");      
    });

});

有人可以帮忙吗？