Sequelize Error with query sending Error: read ECONNRESET - node.js

Question

PostgreSQL 9.6.2 I send query from node.js / express.js application.
The sequelize provide the doc how to make the query, this example findAll.
I try to make same example.
console.log('user id: ', req.decoded);
db.orders.findAll({where: {userId: req.decoded.id}})
.then(function (orders) {
console.log('orders from db: ', orders);
})
.catch(function (err) {
console.log('orders request error from db: ', err);
});
console.log('end of function');
Console log:
user id: { id: 2 }
end of function
orders request error from db: { SequelizeConnectionError: read ECONNRESET
at D:\NodeJSProjects\ParkingHouse\node_modules\sequelize\lib\dialects\postgres\connection-manager.js:110:20
at Connection.<anonymous> (D:\NodeJSProjects\ParkingHouse\node_modules\pg\lib\client.js:186:5)
at emitOne (events.js:96:13)
at Connection.emit (events.js:188:7)
at Socket.<anonymous> (D:\NodeJSProjects\ParkingHouse\node_modules\pg\lib\connection.js:86:10)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at emitErrorNT (net.js:1278:8)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at process._tickCallback (internal/process/next_tick.js:98:9)
name: 'SequelizeConnectionError',
message: 'read ECONNRESET',
parent:
{ Error: read ECONNRESET
at exports._errnoException (util.js:1022:11)
at TCP.onread (net.js:569:26) code: 'ECONNRESET', errno: 'ECONNRESET', syscall: 'read' },
original:
{ Error: read ECONNRESET
at exports._errnoException (util.js:1022:11)
at TCP.onread (net.js:569:26) code: 'ECONNRESET', errno: 'ECONNRESET', syscall: 'read' } }
After some time the request is repeated and then I get the data from db.
I found the similar topic Node js ECONNRESET but I don't found answer.
Why db close the connection? And how to repair it.

Answer 1

The problem was in antivirus F-Secure, change it and all works.
Some problem:
https://community.f-secure.com/t5/Business/DeepGuard-seems-to-cause/td-p/88447

Answer 2

You are loosing you connection. Probably you are not calling next() in your framework. Or do not close transaction.
This structure does not make sense:
.then(function (foundUser) {
return foundUser;
}).catch(function (err) {
//get here the exception
return err;
});
Just remove it. Then rewrite your controller to something like
const user = await authorize(req);
if (!user) {
res.status(401).send('Authorization required');
return next();
}
res.status(200).send('All ok');
next();
On error your framework should serve 500 automatically for you. If you want to handle it manually use try { await Promise } catch (err) { }
If you use something that does not support await/async yet, than take a look at http://koajs.com/

Answer 3

I had similar Error today
{
error: {
Error: write ECONNRESET at WriteWrap.afterWrite (net.js:788:14) errno: 'ECONNRESET',
code: 'ECONNRESET', syscall: 'write'
}
}
You need to set the database maximum pool or avoid sending multiple at the same time.
Here there is a github thread that may help you.