error output

swarmlab-app/src/run/app.js

@@ -4,7 +4,6 @@ var pathmodule = require("path");
 var app = require("express")();
 var http = require("http").Server(app);
 var https = require("https");
-const mongoose = require("mongoose");
 var CONFIG = require(pathmodule.resolve(__dirname, "runconfig.js"));
 const io = require("socket.io")(http, {
   //  pingTimeout: 30000,
@@ -102,7 +101,10 @@ app.get("/length", cors(corsOptions), (req, res) => {
 
   var url = "mongodb://mongo:27017/";
 
-  MongoClient.connect(url, function (err, db) {
+  MongoClient.connect(
+    url,
+    { useNewUrlParser: true, useUnifiedTopology: true },
+    function (err, db) {
       if (err) throw err;
       var dbo = db.db("fluentdb");
       dbo
@@ -161,7 +163,8 @@ app.get("/length", cors(corsOptions), (req, res) => {
           res.json(RES.data);
           db.close();
         });
-  });
+    }
+  );
 });
 
 // Lefos - mongo test read
@@ -170,7 +173,10 @@ app.get("/test", cors(corsOptions), (req, res) => {
 
   var url = "mongodb://mongo:27017/";
 
-  MongoClient.connect(url, function (err, db) {
+  MongoClient.connect(
+    url,
+    { useNewUrlParser: true, useUnifiedTopology: true },
+    function (err, db) {
       if (err) throw err;
       var dbo = db.db("fluentdb");
       dbo
@@ -202,7 +208,8 @@ app.get("/test", cors(corsOptions), (req, res) => {
           res.json(RES.data);
           db.close();
         });
-  });
+    }
+  );
 });
 
 app.get("/test2", cors(corsOptions), (req, res) => {
@@ -219,7 +226,10 @@ app.get("/test2", cors(corsOptions), (req, res) => {
 
   var url = "mongodb://mongo:27017/";
   var jsonfinal = [];
-  MongoClient.connect(url, function (err, db) {
+  MongoClient.connect(
+    url,
+    { useNewUrlParser: true, useUnifiedTopology: true },
+    function (err, db) {
       if (err) throw err;
       var dbo = db.db("fluentdb");
       dbo
@@ -354,7 +364,8 @@ app.get("/test2", cors(corsOptions), (req, res) => {
           res.json(RES.data);
           db.close();
         });
-  });
+    }
+  );
 });
 
 console.log("reading from db....");
@@ -757,11 +768,15 @@ async function checkstream(data) {
     console.log("Creating Stream....");
 
     var url = "mongodb://mongo:27017/";
-    MongoClient.connect(url, function (err, db) {
+    MongoClient.connect(
+      url,
+      { useNewUrlParser: true, useUnifiedTopology: true },
+      function (err, db) {
         if (err) throw err;
         var dbo = db.db("fluentdb");
         dbo.collection("test", onCollectionNew.bind(data));
-    });
+      }
+    );
   }
 }
 // ***************************************************