javascript - file descriptor number increases when using websocket and nodejs -

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i using websocket library ws npm @ 5001 , nodejs port 80 communication.

my issue on period of time number of file descriptors increases results more ram consumption.

below code. 

var sockets = [];    //used 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 , 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 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 ");            });    });

can ?


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