Next.js MySQL Connection Issue

I'm encountering an issue with my Next.js application when trying to establish a connection to a MySQL database using the mysql2 library. I've provided a simplified version of my code below: javascriptCopy code

import React, { useEffect, useState } from 'react';
import { createPool } from 'mysql2/promise';

export default function DbTest() {
    const [connectionStatus, setConnectionStatus] = useState('');

    useEffect(() => {
        testMysqlConnection();
    }, []);

    async function testMysqlConnection() {
        try {
            console.log('Connecting to MySQL database...');
            const pool = createPool({
                host: 'localhost',
                user: 'aiubot_admin_1',
                password: 'WIW22ICACB,WIW22ICACB',
                database: 'aiubot',
                connectionLimit: 10, // Set the maximum number of connections in the pool
            });

            console.log('Connection to MySQL database successful');

            console.log('Attempting to get connection from pool...');
            const connection = await pool.getConnection();
            console.log('Connection retrieved from pool:', connection);

            console.log('Closing connection...');
            connection.release();
            console.log('Connection closed successfully.');

            // End the pool after testing
            pool.end();

            setConnectionStatus('Connection Success');
        } catch (error) {
            console.error('Error connecting to MySQL database:', error.message);
            setConnectionStatus(`Error in the connection: ${error.message}`);
        }
    }

    return (
        <div>
            <h1>Database Connection Test</h1>
            <h2>Hi world</h2>
            <p>{connectionStatus}</p>
        </div>
    );
}

The error message I'm receiving is: "Error connecting to MySQL database: Net.connect is not a function." This occurs when attempting to retrieve a connection from the pool using getConnection() . I've checked my imports, verified the availability of the method, and ensured compatibility with Node.js. However, I'm still unable to resolve the issue. Any insights or suggestions on how to troubleshoot and fix this problem would be greatly appreciated. Thank you in advance for your help!

I have tried re-installing mysql2, I tried using mysql instead, I also tried uninstalling node_modules, I updated my version of mysql and node.js. mysql2 version 3.9.3, node.js version 21.3.0

At this point I don't know what do do.

console log I get:

[HMR] connected
db_test.js:14 Connecting to MySQL database...
db_test.js:23 Connection to MySQL database successful
db_test.js:25 Attempting to get connection from pool...
db_test.js:14 Connecting to MySQL database...
db_test.js:23 Connection to MySQL database successful
db_test.js:25 Attempting to get connection from pool...
client.js:25 Error connecting to MySQL database: Net.connect is not a function
console.error @ client.js:25
window.console.error @ setup-hydration-warning.js:18
testMysqlConnection @ db_test.js:38
await in testMysqlConnection (async)
eval @ db_test.js:9
commitHookEffectListMount @ react-dom.development.js:23150
commitPassiveMountOnFiber @ react-dom.development.js:24926
commitPassiveMountEffects_complete @ react-dom.development.js:24891
commitPassiveMountEffects_begin @ react-dom.development.js:24878
commitPassiveMountEffects @ react-dom.development.js:24866
flushPassiveEffectsImpl @ react-dom.development.js:27039
flushPassiveEffects @ react-dom.development.js:26984
eval @ react-dom.development.js:26769
workLoop @ scheduler.development.js:266
flushWork @ scheduler.development.js:239
performWorkUntilDeadline @ scheduler.development.js:533
client.js:25 Error connecting to MySQL database: Net.connect is not a function
console.error @ client.js:25
window.console.error @ setup-hydration-warning.js:18
testMysqlConnection @ db_test.js:38
await in testMysqlConnection (async)
eval @ db_test.js:9
commitHookEffectListMount @ react-dom.development.js:23150
invokePassiveEffectMountInDEV @ react-dom.development.js:25154
invokeEffectsInDev @ react-dom.development.js:27351
commitDoubleInvokeEffectsInDEV @ react-dom.development.js:27330

Answers

The error message "Net.connect is not a function" typically occurs when there is a mismatch between the versions of Node.js and the mysql2 library. It seems like you are using Node.js version 21.3.0, but the mysql2 library may not be fully compatible with this version.

To resolve this issue, you can try the following steps:

Downgrade Node.js: Since the mysql2 library might not be fully compatible with Node.js version 21.3.0, consider downgrading your Node.js version to a more stable and compatible version. You can try using a Long Term Support (LTS) version of Node.js, such as version 14.x or 16.x, which are more widely supported.
Update mysql2: Make sure you are using the latest version of the mysql2 library. You mentioned that you are using version 3.9.3, but there might be newer versions available with better compatibility.
Check for Breaking Changes: Review the release notes of the mysql2 library to see if there are any breaking changes or known issues that might affect your application. Sometimes, updating to a newer version of the library might introduce compatibility issues with your existing code.
Test in a Different Environment: If possible, try running your application in a different environment or on a different machine to see if the issue persists. This can help identify if the problem is specific to your current setup.
Use a Different Database Driver: If you continue to experience issues with the mysql2 library, consider using a different database driver for MySQL, such as mysql or mysqljs/mysql, to see if it resolves the problem.

By following these steps, you should be able to troubleshoot and fix the issue with establishing a connection to the MySQL database in your Next.js application. If you continue to encounter problems, you may need to seek further assistance from the mysql2 library maintainers or the Next.js community for additional support.

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