Error: A slave with the same server_uuid/server_id as this slave has connected to the master;

Hi @rodrigogs,

Has been working great! But looking at the log error I saw a new one:

‘A slave with the same server_uuid/server_id as this slave has connected to the master; the first event 'mysql-bin.000089' at 43535345, the last event read from '/mysql/binlog/mysql-bin.000089' at 56994447, the last byte read from '/mysql/binlog/mysql-bin.000089' at 56994447.’, sqlState: ‘HY000’ }

I have 2 databases (Production, Development ) And have 2 listeners that gives this error

My Code Dev

const mysql = require('mysql');
var MySQLEvents = require("@rodrigogs/mysql-events");
 const schemaName ='nms';

My Code Prod

const mysql = require('mysql');
var MySQLEvents = require("@rodrigogs/mysql-events");
 const schemaName ='nmsProd';

Same code for both

const db_config = { host: '35.234.131.94', user:XXX', password: XXX', database: schemaName, };

let connectDB = mysql.createConnection(db_config);
let instance = new MySQLEvents(connectDB, {
    startAtEnd: true,
    excludedSchemas: {
        mysql: true
    },
});
startTrigers();

function handleDisconnect() {
    console.log('handleDisconnect');
    connectDB.destroy();
    connectDB = mysql.createConnection(db_config);
    connectDB.connect(function (err) {
        if (err) {
            console.log(' Error when connecting to db  (DBERR001):', err);
            setTimeout(handleDisconnect, 1000);
        }
        else{
            // startTrigers();
        }
    });
}


instance.on(MySQLEvents.EVENTS.CONNECTION_ERROR, (err) => {
    console.log('Connection is asleep (time to wake it up): ', err);
    setTimeout(handleDisconnect, 1000);
    handleDisconnect();
});

instance.on(MySQLEvents.EVENTS.ZONGJI_ERROR, console.error);

function startTrigers() {

    instance.start();

    instance.addTrigger({
        name: 'ALERT_INSERTED',
        expression: schemaName + '.nms_alert',
        statement: MySQLEvents.STATEMENTS.INSERT,
        onEvent: (event) => {
            console.log("", new Date());
            console.log("==== ALERT INSERTED  ===");
            sendAlert(event);
        },
    });

Do I have to change something?

[ubuntutest]

please don’t flame me, i’m really new with nodejs, i don’t know exactly what i’m doing. But to solve this problem I assigned a random value, (more precisely the current date) so I know it will never have the same value.

  const instance = new MySQLEvents(connection, {
    startAtEnd: true,
    serverId: Date.now()
  });

is this totally wrong?

[imzers]

Hi, I have this error before, my environment was a master and some slave database, there is replication from slave-db to master-db and if I using mysql-events plugin to connect from another vm, it get error (A slave with the same server_uuid/server_id as this slave has connected…) Found solustion by connect with another user with REPLICATION_SLAVE & REPLICATION_CLIENT privileges and unique server_id from concurrent connection https://dba.stackexchange.com/questions/231414/error-a-slave-with-the-same-server-uuid-server-id-as-this-slave-has-connected