Unable to Establish a Java MySQL Connection

Data and Databases
1

I encounter a connection timeout when linking Java with MySQL. Error logs show communication failures. Revised sample code:

import java.sql.*;

public class DBConnector {
    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            Connection connection = DriverManager.getConnection("jdbc:mysql://host:3306/sampleDB", "user", "password");
            System.out.println("Connected to database successfully");
            connection.close();
        } catch(Exception ex) {
            ex.printStackTrace();
        }
    }
}
2

In my experience, connection timeouts between Java and MySQL can often be traced back to a few key issues. The first step is to ensure that the MySQL server is correctly configured to accept connections, particularly from remote hosts if applicable. I encountered a similar problem and resolved it by verifying the JDBC driver version and adding necessary URL parameters for timezone and SSL settings. It was also essential to check the network settings and firewall configurations, which can frequently be at the root of such connection delays.

3

hey, i had simlar issues. check ur firewall and driver conf - sometimes the server doesn’t allow remote connections. updating the connector version helped me. hope this tips u off a bit.

4

hey jumpingbear, have u tried adjusting the connection timeout and checking the server port? ive seen connection hiccups when the port settings are misconfigured. anyone else experimenting with autoReconnect? would be cool to share more upon tweaking network settings