I can't seem to get the example program to work from MariaDB's documentation.
Here's the code I am using which is a minimally modified version from the example in the docs.
const mariadb = require('mariadb');
const pool = mariadb.createPool({
host: 'localhost',
user: 'admin',
password: 'adminpassword',
database: 'userdb',
port: 3306,
connectionLimit: 5
});
async function f() {
console.log(pool);
let connection;
try {
console.log('Connection start');
connection = await pool.getConnection();
console.log('Connected');
const rows = await connection.query('select * from users');
console.log(rows);
const res = await connection.query('insert into users value (?, ?)', [1, 'testuser']);
console.log(res);
await connection.release();
}
catch(exception) {
console.log(exception);
}
if(connection) {
return connection.end();
}
}
f();
This is the output that I obtain if I run this code.
ode index.js
PoolPromise {
_events: [Object: null prototype] {},
_eventsCount: 0,
_maxListeners: undefined,
[Symbol(kCapture)]: false
}
Connection start
SqlError: (conn=-1, no: 45028, SQLState: HY000) retrieve connection from pool timeout after 10001ms
(pool connections: active=0 idle=0 limit=5)
at module.exports.createError (.../node_modules/mariadb/lib/misc/errors.js:57:10)
at Pool._requestTimeoutHandler (.../node_modules/mariadb/lib/pool.js:345:26)
at listOnTimeout (node:internal/timers:564:17)
at process.processTimers (node:internal/timers:507:7) {
text: 'retrieve connection from pool timeout after 10001ms\n' +
' (pool connections: active=0 idle=0 limit=5)',
sql: null,
fatal: false,
errno: 45028,
sqlState: 'HY000',
code: 'ER_GET_CONNECTION_TIMEOUT'
}
node:internal/process/promises:289
triggerUncaughtException(err, true /* fromPromise */);
^
Error: connect ECONNREFUSED ::1:3306
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1471:16)
From event:
at .../node_modules/mariadb/lib/connection.js:115:13
at new Promise (<anonymous>)
at Connection.connect (.../node_modules/mariadb/lib/connection.js:103:12)
at Pool._createConnection (.../node_modules/mariadb/lib/pool.js:402:16)
at Pool._doCreateConnection (.../node_modules/mariadb/lib/pool.js:40:10)
at listOnTimeout (node:internal/timers:564:17)
at process.processTimers (node:internal/timers:507:7)
Emitted 'error' event on PoolPromise instance at:
at Pool.emit (node:events:513:28)
at .../node_modules/mariadb/lib/pool.js:258:22
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
errno: -111,
code: 'ECONNREFUSED',
syscall: 'connect',
address: '::1',
port: 3306,
fatal: true,
sqlState: 'HY000'
}
Node.js v19.3.0
My questions are any one of the following:
Why does this happen?
Where can I find the logs to obtain more information?
Do I have to enable the logs, if so, how?
How can I debug this issue?
I can connect perfectly fine using the CLI and Beekeeper Studio.
There doesn't seem to be a mariadb connection option to make non IP hostname lookup favor IPv4. The general resolve order fix shown in https://github.com/nodejs/node/issues/40537#issuecomment-1237194449:
import dns from 'node:dns';
dns.setDefaultResultOrder('ipv4first');
may fix this, but would affect things other than the database connection.
Other than that, it seems your choices are to specify 127.0.0.1 instead of localhost, or to configure your server to also listen on ::1.
It seems to be trying to connect over ipv6 (::1). I suspect that your MariaDb instance only bound to an ipv4 address, and hence host: '127.0.0.1' might work.
You can try that or use ss -atnl | grep 3306 to see what addresses MariaDB is bound to.
You computer is assigned IPs from IPV4 and IPV6 and by default dns resolve to localhost for IPV6 which is incorrectly assigned.
To fix this error either configure your DHCP to assign proper IPV6 or change host:127.0.0.1 (simple and quick fix)
Related
I have a problem when I try to connect my app with my database with Mongoose. Already tried following solutions that I found on google:
restarting MongoDB service on windows
manually open db with cmd located on bin file of mongodb
But I can't solve it. Can anyone help me ?
//my connection
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true
})
.then(db => console.log('DB is connected'))
.catch(err => console.log(err));
And throw's me , this error
MongooseServerSelectionError: connect ECONNREFUSED ::1:27017
at NativeConnection.Connection.openUri (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\connection.js:797:32)
at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:330:10 at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:32:5
at new Promise ()
at promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:31:10)
at Mongoose._promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:1151:10)
at Mongoose.connect (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:329:20)
at Object. (C:\Users\ivan\Desktop\NodeJS\notes-app\src\db.js:3:10)
at Module._compile (node:internal/modules/cjs/loader:1095:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1147:10) {
reason: TopologyDescription {
type: 'Unknown',
servers: Map(1) { 'localhost:27017' => [ServerDescription] },
stale: false,
compatible: true,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
logicalSessionTimeoutMinutes: undefined
}
}
I try to put the port on my connection code like this
//my connection
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true
})
.then(db => console.log('DB is connected'))
.catch(err => console.log(err));
and it throw's me another error
MongooseServerSelectionError: Invalid message size: 1347703880, max allowed: 67108864
at NativeConnection.Connection.openUri (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\connection.js:797:32)
at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:330:10 at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:32:5
at new Promise ()
at promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:31:10)
at Mongoose._promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:1151:10)
at Mongoose.connect (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:329:20)
at Object. (C:\Users\ivan\Desktop\NodeJS\notes-app\src\db.js:3:10)
at Module._compile (node:internal/modules/cjs/loader:1095:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1147:10) {
reason: TopologyDescription {
type: 'Unknown',
servers: Map(1) { 'localhost:3000' => [ServerDescription] },
stale: false,
compatible: true,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
logicalSessionTimeoutMinutes: undefined
}
}
If the Error states:
connect() Error :MongooseServerSelectionError: connect ECONNREFUSED ::1:27017
Then the connection to localhost is refused on the IPv6 address ::1 .
Mongoose per default uses IPv6 ..
For a quick check you can set the IPv4 address explicit:
mongoose.connect('mongodb://127.0.0.1/test')
Simply pass third parameter family:4 ie.
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true,
family: 4,
})
I finally solved it.
Enabling the IPV6 that MongoDB has disabled by default. Using the following command line on CMD:
mongod --ipv6
And then try again the connection and it works!
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true
})
.then(db => console.log('DB is connected'))
.catch(err => console.log(err));
Posted on behalf of the question asker
const uri = 'mongodb://localhost:27017/test';
const options = {
useNewUrlParser: true,
useUnifiedTopology: true,
serverSelectionTimeoutMS: 5000,
autoIndex: false, // Don't build indexes
maxPoolSize: 10, // Maintain up to 10 socket connections
serverSelectionTimeoutMS: 5000, // Keep trying to send operations for 5 seconds
socketTimeoutMS: 45000, // Close sockets after 45 seconds of inactivity
family: 4 // Use IPv4, skip trying IPv6
}
const connectWithDB = () => {
mongoose.connect(uri, options, (err, db) => {
if (err) console.error(err);
else console.log("database connection")
})
}
connectWithDB()
Probably the hostname/IP of the server to which you want to connect is not correctly set.
I'm used to see that error as:
MongooseServerSelectionError: connect ECONNREFUSED <hostname/hostIP>:<port>
and in the console log you've posted, the <hostname/hostIP> part is malformed/missing.
Example - for a mongodb server running locally on port 27017 this is the error when server is down:
MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017
If you're using mongodb URI to connect to the db make sure that it looks like this
"mongodb://<hostname/hostIP>:<port>"
Problem is, the localhost alias resolves to IPv6 address ::1 instead of 127.0.0.1
However, net.ipv6 defaults to false.
The best option would be to start the MongoDB with this configuration:
net:
ipv6: true
bindIpAll: true
or
net:
ipv6: true
bindIp: localhost
Then all variants should work:
C:\>mongosh "mongodb://localhost:27017" --quiet --eval "db.getMongo()"
mongodb://localhost:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+1.6.0
C:\>mongosh "mongodb://127.0.0.1:27017" --quiet --eval "db.getMongo()"
mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+1.6.0
C:\>mongosh "mongodb://[::1]:27017" --quiet --eval "db.getMongo()"
mongodb://[::1]:27017/?directConnection=true&appName=mongosh+1.6.0
If you don't run MongoDB as a service then it would be
mongod --bind_ip_all --ipv6 <other options>
NB, I don't like configuration
net:
bindIp: <ip_address>
in my opinion this makes only sense on a computer with multiple network interfaces. Use bindIp: localhost if you need to prevent any connections from remote computer (e.g. while maintenance or when used as backend database for a web-service), otherwise use bindIpAll: true
Open your terminal and type this command: mongod
Then use your app.js to establish a connection by writing this code :
const mongoose=require("mongoose");
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true,
family: 4,
})
It's done now. Simply open your mongo shell or your mongodb compass and look for whatever you have added.
I also faced the same problem those commands worked for me(Ubuntu machine)
sudo chown -R mongodb:mongodb /var/lib/mongodb
sudo chown mongodb:mongodb /tmp/mongodb-27017.sock
Then
sudo service mongod restart
I have a problem when I try to connect my app with my database with Mongoose. Already tried following solutions that I found on google:
restarting MongoDB service on windows
manually open db with cmd located on bin file of mongodb
But I can't solve it. Can anyone help me ?
//my connection
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true
})
.then(db => console.log('DB is connected'))
.catch(err => console.log(err));
And throw's me , this error
MongooseServerSelectionError: connect ECONNREFUSED ::1:27017
at NativeConnection.Connection.openUri (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\connection.js:797:32)
at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:330:10 at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:32:5
at new Promise ()
at promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:31:10)
at Mongoose._promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:1151:10)
at Mongoose.connect (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:329:20)
at Object. (C:\Users\ivan\Desktop\NodeJS\notes-app\src\db.js:3:10)
at Module._compile (node:internal/modules/cjs/loader:1095:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1147:10) {
reason: TopologyDescription {
type: 'Unknown',
servers: Map(1) { 'localhost:27017' => [ServerDescription] },
stale: false,
compatible: true,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
logicalSessionTimeoutMinutes: undefined
}
}
I try to put the port on my connection code like this
//my connection
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true
})
.then(db => console.log('DB is connected'))
.catch(err => console.log(err));
and it throw's me another error
MongooseServerSelectionError: Invalid message size: 1347703880, max allowed: 67108864
at NativeConnection.Connection.openUri (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\connection.js:797:32)
at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:330:10 at C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:32:5
at new Promise ()
at promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\helpers\promiseOrCallback.js:31:10)
at Mongoose._promiseOrCallback (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:1151:10)
at Mongoose.connect (C:\Users\ivan\Desktop\NodeJS\notes-app\node_modules\mongoose\lib\index.js:329:20)
at Object. (C:\Users\ivan\Desktop\NodeJS\notes-app\src\db.js:3:10)
at Module._compile (node:internal/modules/cjs/loader:1095:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1147:10) {
reason: TopologyDescription {
type: 'Unknown',
servers: Map(1) { 'localhost:3000' => [ServerDescription] },
stale: false,
compatible: true,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
logicalSessionTimeoutMinutes: undefined
}
}
If the Error states:
connect() Error :MongooseServerSelectionError: connect ECONNREFUSED ::1:27017
Then the connection to localhost is refused on the IPv6 address ::1 .
Mongoose per default uses IPv6 ..
For a quick check you can set the IPv4 address explicit:
mongoose.connect('mongodb://127.0.0.1/test')
Simply pass third parameter family:4 ie.
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true,
family: 4,
})
I finally solved it.
Enabling the IPV6 that MongoDB has disabled by default. Using the following command line on CMD:
mongod --ipv6
And then try again the connection and it works!
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true
})
.then(db => console.log('DB is connected'))
.catch(err => console.log(err));
Posted on behalf of the question asker
const uri = 'mongodb://localhost:27017/test';
const options = {
useNewUrlParser: true,
useUnifiedTopology: true,
serverSelectionTimeoutMS: 5000,
autoIndex: false, // Don't build indexes
maxPoolSize: 10, // Maintain up to 10 socket connections
serverSelectionTimeoutMS: 5000, // Keep trying to send operations for 5 seconds
socketTimeoutMS: 45000, // Close sockets after 45 seconds of inactivity
family: 4 // Use IPv4, skip trying IPv6
}
const connectWithDB = () => {
mongoose.connect(uri, options, (err, db) => {
if (err) console.error(err);
else console.log("database connection")
})
}
connectWithDB()
Probably the hostname/IP of the server to which you want to connect is not correctly set.
I'm used to see that error as:
MongooseServerSelectionError: connect ECONNREFUSED <hostname/hostIP>:<port>
and in the console log you've posted, the <hostname/hostIP> part is malformed/missing.
Example - for a mongodb server running locally on port 27017 this is the error when server is down:
MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017
If you're using mongodb URI to connect to the db make sure that it looks like this
"mongodb://<hostname/hostIP>:<port>"
Problem is, the localhost alias resolves to IPv6 address ::1 instead of 127.0.0.1
However, net.ipv6 defaults to false.
The best option would be to start the MongoDB with this configuration:
net:
ipv6: true
bindIpAll: true
or
net:
ipv6: true
bindIp: localhost
Then all variants should work:
C:\>mongosh "mongodb://localhost:27017" --quiet --eval "db.getMongo()"
mongodb://localhost:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+1.6.0
C:\>mongosh "mongodb://127.0.0.1:27017" --quiet --eval "db.getMongo()"
mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+1.6.0
C:\>mongosh "mongodb://[::1]:27017" --quiet --eval "db.getMongo()"
mongodb://[::1]:27017/?directConnection=true&appName=mongosh+1.6.0
If you don't run MongoDB as a service then it would be
mongod --bind_ip_all --ipv6 <other options>
NB, I don't like configuration
net:
bindIp: <ip_address>
in my opinion this makes only sense on a computer with multiple network interfaces. Use bindIp: localhost if you need to prevent any connections from remote computer (e.g. while maintenance or when used as backend database for a web-service), otherwise use bindIpAll: true
Open your terminal and type this command: mongod
Then use your app.js to establish a connection by writing this code :
const mongoose=require("mongoose");
mongoose.connect('mongodb://localhost/notes-db-app',{
useNewUrlParser: true,
useUnifiedTopology: true,
family: 4,
})
It's done now. Simply open your mongo shell or your mongodb compass and look for whatever you have added.
I also faced the same problem those commands worked for me(Ubuntu machine)
sudo chown -R mongodb:mongodb /var/lib/mongodb
sudo chown mongodb:mongodb /tmp/mongodb-27017.sock
Then
sudo service mongod restart
net.createConnection always seems to give ECONNREFUSED. I did a tcpdump and don't quite know what I'm looking for.
Code:
const net = require('net');
const client = net.createConnection({ port: 8124}, () => {
// 'connect' listener.
console.log('connected to server!');
client.write('world!\r\n');
});
client.on('error', function(e) {
console.log(e);
console.log(e.message);
});
client.on('data', (data) => {
console.log(data.toString());
client.end();
});
client.on('end', () => {
console.log('disconnected from server');
});
Output:
Error: connect ECONNREFUSED 127.0.0.1:8124
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16) {
errno: -4078,
code: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 8124
}
connect ECONNREFUSED 127.0.0.1:8124
Link to the pcap file to view the packets Click me
Use a tracer like tcpdump to see what is actually going on. The message, "connection refused," is actually a bit misleading. It doesn't actually mean that the host has identified you and is now refusing to talk to you.
Make sure you have a server running on port 8124 of your local machine (127.0.0.1). ECONNREFUSED means you dont.
I'm using the 'mssql' npm package to connect my SQL server to my node JS.
I went through a few questions, but it wasn't solved anywhere.
My SQL Server login credentials are-
server type : Database Engine
Server name : DESKTOP-MPF88ST\KUSHAL
authentication : sql server authentication
login : username
password : password
and the database I wanna get is schoolDB
and my code goes something like this
const sql =require("mssql")
const config = {
login: 'username',
password:'password',
server: 'localhost',
database: "schoolDB",
options : {
enableArithAbort: true
},
port : 1433
}
sql.connect(config, (err) => {
if(err){
console.log(err);
}
else {
console.log("Connected")
}
I have my TCP/IP enabled and set up, SQL Server Browser enabled, but it still throws the error-
ConnectionError: Failed to connect to localhost:1433 - Could not connect (sequence)
at Connection.<anonymous> (E:\Kushals\server\node_modules\mssql\lib\tedious\connection-pool.js:68:17)
at Object.onceWrapper (events.js:422:26)
at Connection.emit (events.js:315:20)
at Connection.socketError (E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connection.js:1290:12)
at E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connection.js:1116:21
at SequentialConnectionStrategy.connect (E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connector.js:87:14)
at Socket.onError (E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connector.js:100:12)
at Socket.emit (events.js:315:20)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3) {
code: 'ESOCKET',
originalError: ConnectionError: Failed to connect to localhost:1433 - Could not connect (sequence)
at ConnectionError (E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\errors.js:13:12)
at Connection.socketError (E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connection.js:1290:56)
at E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connection.js:1116:21
at SequentialConnectionStrategy.connect (E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connector.js:87:14)
at Socket.onError (E:\Kushals\server\node_modules\mssql\node_modules\tedious\lib\connector.js:100:12)
at Socket.emit (events.js:315:20)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
code: 'ESOCKET'
}
}
How can I solve it ??
Try this:
const sql = require('mssql/msnodesqlv8')
const pool = new sql.ConnectionPool({
login: 'username',
password:'password',
database: 'schoolDB',
server: 'DESKTOP-MPF88ST\KUSHAL',
driver: 'msnodesqlv8',
options: {
trustedConnection: true
}
})
pool.connect().then(() => {
//sample query
pool.request().query('select 1 as number', (err, result) => {
console.dir(result)
})
})
Ensure that the TCP/IP protocol is Enabled as it is disabled by default.
Steps:
Go to Computer management
Under Service and Applications -> SQL Server Configuration Manager
-> SQL Server Network configuration -> click on "Protocols for MSSQLSERVER"
You will see TCP/IP section (to enable right click and enable it)
I have NODE.JS application which works with remote MySQL database. In my local computer (windows 10) application successfully connected to remote MySQL database. I use sequelize library for this task. MySQL database has 40 maximum connection pool for each user. When I run this application in Docker which is in CentOS server I notice error. Application raise error when try to connect to remote MySQL database in Docker container. What can be the reason of this problem for your opinion? How I can fix this problem?
ERROR:
Unable to connect to remote MySQL database: { SequelizeConnectionError: connect ETIMEDOUT
at Utils.Promise.tap.then.catch.err (/node_modules/sequelize/lib/dialects/mysql/connection-manager.js:149:19)
at tryCatcher (/node_modules/bluebird/js/release/util.js:16:23)
at Promise._settlePromiseFromHandler (/node_modules/bluebird/js/release/promise.js:512:31)
at Promise._settlePromise (/node_modules/bluebird/js/release/promise.js:569:18)
at Promise._settlePromise0 (/node_modules/bluebird/js/release/promise.js:614:10)
at Promise._settlePromises (/node_modules/bluebird/js/release/promise.js:690:18)
at _drainQueueStep (/node_modules/bluebird/js/release/async.js:138:12)
at _drainQueue (/node_modules/bluebird/js/release/async.js:131:9)
at Async._drainQueues (/node_modules/bluebird/js/release/async.js:147:5)
at Immediate.Async.drainQueues [as _onImmediate] (/node_modules/bluebird/js/release/async.js:17:14)
at processImmediate (timers.js:632:19)
name: 'SequelizeConnectionError',
parent:
{ Error: connect ETIMEDOUT
at Connection._handleTimeoutError (/node_modules/mysql2/lib/connection.js:173:17)
at listOnTimeout (timers.js:324:15)
at processTimers (timers.js:268:5)
errorno: 'ETIMEDOUT',
code: 'ETIMEDOUT',
syscall: 'connect',
fatal: true },
original:
{ Error: connect ETIMEDOUT
at Connection._handleTimeoutError (/node_modules/mysql2/lib/connection.js:173:17)
at listOnTimeout (timers.js:324:15)
at processTimers (timers.js:268:5)
errorno: 'ETIMEDOUT',
code: 'ETIMEDOUT',
syscall: 'connect',
fatal: true } }
JS:
const Sequelize = require('sequelize');
// "max_user_connections" resource for "db_user" user is "40".
const sequelize = new Sequelize('db_name', 'db_user', 'db_password', {
host: 'HOST',
port: '3306',
dialect: 'mysql',
pool: {
max: 15,
min: 5,
idle: 20000,
evict: 15000,
acquire: 30000
}
});
sequelize.authenticate().then(() => {
console.log('Connection to remote MySQL database has been established successfully.');
}).catch(err => {
console.error('Unable to connect to remote MySQL database:', err);
});
module.exports = sequelize;
Dependencies:
"sequelize": "^4.42.0",
"mysql2": "^1.6.4"