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Connection between MariaDB and NodeJS not working

I'm using a vServer from Ionos for a little project. I installed a MariaDB and NodeJS. Currently I'm trying to connect them both. Here is my code:
const mariadb = require('mariadb');
const pool = mariadb.createPool({
host: 'localhost',
user:'root',
password: 'xxxxxxxxx',
database: 'christmastrees',
connectionLimit: 5,
});
async function asyncFunction() {
let conn;
try {
conn = await pool.getConnection();
const rows = await conn.query("SELECT * from bäume");
console.log(rows); //[ {val: 1}, meta: ... ]
} catch (err) {
throw err;
} finally {
if (conn) return conn.end();
}
}
But when executing the file (node app), I get an error message after a few seconds
Error: connect ECONNREFUSED 127.0.0.1:3306
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)
From event:
at _registerHandshakeCmd (/root/server/node_modules/mariadb/lib/connection.js:745:11)
at /root/server/node_modules/mariadb/lib/connection.js:57:11
at new Promise (<anonymous>)
at Connection.connect (/root/server/node_modules/mariadb/lib/connection.js:56:16)
at createConnectionPoolPromise (/root/server/node_modules/mariadb/lib/pool-promise.js:31:8)
at creationTryout (/root/server/node_modules/mariadb/lib/pool-base.js:373:9)
at listOnTimeout (node:internal/timers:557:17)
at processTimers (node:internal/timers:500:7) {
errno: -111,
code: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 3306,
fatal: true
}
So I searched for help and after 2 hours I literally found only one Idea. I added this line of code to my connection...
port: '/var/run/mysqld/mysqld.sock'
I tryed again to use node app, but this time I didn't get an error message, it is loading forever and nothing happens.
I would be so grateful for any help...

So I found the solution to my problem.
I checked if my MariaDB Service is even running and no it wasn't ^^

Node events.js:174 throw er; // Unhandled 'error' event

I get an error when requesting an API and it crashes on any win server. Can anybody help, please?
This is part of my code:
app.get("/js/2806/api/products/getAllDrugs", (req, res) => {
const connection = getDBConnection()
const queryString = "SELECT * FROM tbl_drug";
connection.query(queryString, (err, rows, fields) => {
if (err) {
console.log("Failed to query for drugs: " + err);
// res.sendStatus(500);
res.json({
ErrorDetail: {
code: -1,
msg: err.code
}
});
res.end();
return
}
const drugs = rows.map((row) => {
return {
id: row.id,
storeId: row.drugStoreId,
drugName: row.drugName,
description: row.drugDsc,
drugUsing: row.drugUsing,
drugDoseId: row.drugDoseId,
categoryId: row.categoryId
};
})
res.json({
ErrorDetail: {
code: 0
},
Response: drugs
})
})
});
Error: Connection lost: The server closed the connection. at Protocol.end (C:\Users\Administrator\AppData\Local\CaptainCure\n s\mysql\lib\protocol\Protocol.js:112:13) at Socket. (C:\Users\Administrator\AppData\Local\Captain odules\mysql\lib\Connection.js:97:28) at Socket. (C:\Users\Administrator\AppData\Local\Captain odules\mysql\lib\Connection.js:502:10) at Socket.emit (events.js:194:15) at endReadableNT (_stream_readable.js:1125:12) at process._tickCallback (internal/process/next_tick.js:63:19) Emitted 'error' event at: at Connection._handleProtocolError (C:\Users\Administrator\AppData\ ainCure\node_modules\mysql\lib\Connection.js:425:8) at Protocol.emit (events.js:189:13) at Protocol._delegateError (C:\Users\Administrator\AppData\Local\Ca node_modules\mysql\lib\protocol\Protocol.js:390:10) at Protocol.end (C:\Users\Administrator\AppData\Local\CaptainCure\n s\mysql\lib\protocol\Protocol.js:116:8) at Socket. (C:\Users\Administrator\AppData\Local\Captain odules\mysql\lib\Connection.js:97:28) I— lines matching original stack trace ...] at process._tickCallback Cinternal/process/next_tick.js:63:19> [nodemon I - wait in is (nodemon] si ing 'node app.js -erver is running on port: 3000 ode events.js:174 throw er; // Unhandled 'error' event is (nodemon] starting 'node app.js' -erver is running on port: 3000

Because of the server is already running on back so we do have to restart.
and if your using both iterm and the terminal so you need to make sure that the you use only one other one you have to close.

Trouble making nodejs mysql connection

I am trying to make a simple connection between my nodejs server and my mysql db (using Microsoft SQL server manager studio v14), below is my code and the error message appearing in my console window.
here is my code:
var express = require('express');
var app = express();
var sql = require("mssql");
app.get('/', function (req, res) {
// config for your database
var config = {
user: 'superadmin',
password: '***',
server: 'localhost',
database: 'XXX'
};
// connect to your database
sql.connect(config, function (err) {
if (err) console.log(err);
// create Request object
var request = new sql.Request();
// query to the database and get the records
request.query('select * from Schools', function (err, recordset) {
if (err) console.log(err)
// send records as a response
res.send(recordset);
});
});
});
var server = app.listen(5000, function () {
console.log('Server is running..');
});
The error I am getting looks like this:
Server is running..
tedious deprecated The default value for `options.encrypt` will change from `false` to `true`. Please pass `false` explicitly if you want to retain current behaviour. node_modules\mssql\lib\tedious.js:212:23
{ ConnectionError: Failed to connect to localhost:1433 - Could not connect (sequence)
at Connection.tedious.once.err (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\mssql\lib\tedious.js:216:17)
at Object.onceWrapper (events.js:275:13)
at Connection.emit (events.js:182:13)
at Connection.socketError (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connection.js:1004:14)
at C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connection.js:869:25
at SequentialConnectionStrategy.connect (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connector.js:154:9)
at Socket.onError (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connector.js:170:16)
at Socket.emit (events.js:182:13)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
code: 'ESOCKET',
originalError:
{ ConnectionError: Failed to connect to localhost:1433 - Could not connect (sequence)
at ConnectionError (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\errors.js:12:12)
at Connection.socketError (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connection.js:1004:30)
at C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connection.js:869:25
at SequentialConnectionStrategy.connect (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connector.js:154:9)
at Socket.onError (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\tedious\lib\connector.js:170:16)
at Socket.emit (events.js:182:13)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
at process._tickCallback (internal/process/next_tick.js:174:19)
message: 'Failed to connect to localhost:1433 - Could not connect (sequence)',
code: 'ESOCKET' },
name: 'ConnectionError' }
{ ConnectionError: Connection is closed.
at Request._query (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\mssql\lib\base.js:1299:37)
at Request._query (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\mssql\lib\tedious.js:497:11)
at Request.query (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\mssql\lib\base.js:1242:12)
at C:\Users\smr09\Desktop\Code\ou\db_test\test.js:24:17
at _poolCreate.then.catch.err (C:\Users\smr09\Desktop\Code\ou\db_test\node_modules\mssql\lib\base.js:269:7)
at process._tickCallback (internal/process/next_tick.js:178:7) code: 'ECONNCLOSED', name: 'ConnectionError' }
I am rather new at this particularly with dealing with databases. Can someone explain what the error means?

Add this line to the config:
options: {
encrypt: false
}
It will finally look like:
var config = {
user: 'superadmin',
password: '***',
server: 'localhost',
database: 'XXX' ,
options: {
encrypt: false
}
};

try to put encrypt: false in your config{}, it will work.

your error:
ConnectionError: Failed to connect to localhost:1433 - Could not
connect (sequence)
My problem was resolved by adding port
var config = {
user: 'superadmin',
password: '***',
server: 'localhost',
database: 'XXX',
port: '',
};

Node.js MSSQL 500: Internal Error. Details: ConnectionError: Failed to connect to DESKTOP-LK9JDJJ:1433 - connect ECONNREFUSED 192.168.99.1:1433

settings.js
exports.dbConfig = {
user: "gpolat",
password: "alphalpha",
server: "DESKTOP-LK9JDJJ",
database: "mydemo",
port: 1433
};
exports.webPort = 9000;
db.js
var sqlDb = require("mssql");
var settings = require("../settings");
exports.executeSql = function (sql, callback) {
var conn = new sqlDb.Connection(settings.dbConfig);
conn.connect()
.then(function () {
var req = new sqlDb.Request(conn);
req.query(sql)
.then(function (recordset) {
callback(recordset);
})
.catch(function (err) {
console.log(err);
callback(null, err);
});
})
.catch(function (err) {
console.log(err);
callback(null, err);
});
};
Console Error:
Debugger listening on 127.0.0.1:5858
Started Listening at: 9000
{ ConnectionError: Failed to connect to DESKTOP-LK9JDJJ:1433 - connect
ECONNREFUSED 192.168.99.1:1433
at Connection.<anonymous> (C:\Users\Gokhan\documents\visual studio
2015\Projects\SampleREST\SampleREST\node_modules\mssql\lib\tedious.js:378:25)
at Object.onceWrapper (events.js:290:19)
at emitOne (events.js:96:13)
at Connection.emit (events.js:188:7)
at Connection.socketError (C:\Users\Gokhan\documents\visual studio
Projects\SampleREST\SampleREST\node_modules\tedious\lib\connection.js:531:1
4)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at emitErrorNT (net.js:1281:8)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at process._tickCallback (internal/process/next_tick.js:98:9)
name: 'ConnectionError',
message: 'Failed to connect to DESKTOP-LK9JDJJ:1433 - connect ECONNREFUSED
192.168.99.1:1433',
code: 'ESOCKET' }
I get this error while creating the rest API via sql server.
"500: Internal Error. Details: ConnectionError: Failed to connect to DESKTOP-LK9JDJJ:1433 - connect ECONNREFUSED 192.168.99.1:1433"

connection error while connecting mongodb to node application

after I started server at port 27017, opened another window and run my server program it is showing the connection error as follow
C:\node-mongodb\node_modules\mongodb\lib\server.js:242
process.nextTick(function() { throw err; })
^
AssertionError: { [MongoError: connect UNKNOWN 127.0.0.1:27017 -
Local(undefined:undefined)]
name: 'MongoError',
message: 'connect UNKNOWN == null
at C:\node-mongodb\simple-server.js:8:12
at C:\node-mongodb\node_modules\mongodb\lib\mongo_client.js:330:20
at C:\node-mongodb\node_modules\mongodb\lib\db.js:231:14
at null.<anonymous> (C:\node-mongodb\node_modules\mongodb\lib\server.js:240:9)
at g (events.js:260:16)
at emitTwo (events.js:87:13)
at emit (events.js:172:7)
at null.<anonymous(C:\nodemongodb\node_modules\mongodb\node_modules\mongo
db-core\lib\topologies\server.js:218:12)
at g (events.js:260:16)
at emitTwo (events.js:87:13)
I tried removing lock file repairing mongodb and other solutions that are given for other similar questions but they are not working.
please tell my why this error is coming and how I can resolve it.
I am running on windows xp(32-bit).
This is the simple-server.js file:
var MongoClient = require('mongodb').MongoClient,
assert = require('assert');
// Connection URL
var url = 'mongodb://localhost:27017/test';
// Use connect method to connect to the Server
MongoClient.connect(url, function (err, db) {
assert.equal(err,null);
console.log("Connected correctly to server");
var collection = db.collection("dishes");
collection.insertOne({name: "nerd21", description: "test"},
function(err,result){
assert.equal(err,null);
console.log("After Insert:");
console.log(result.ops);
collection.find({}).toArray(function(err,docs){
assert.equal(err,null);
console.log("Found:");
console.log(docs);
db.dropCollection("dishes", function(err, result){
assert.equal(err,null);
db.close();
});
});
});
});
screenshot of command prompt is as follows:enter image description here