java - without - the reference to entity "usessl" must end with the ';' delimiter.

Warning about SSL connection when connecting to MySQL database (8)

With the two classes below, I've tried connect to a MySQL database. However, I always get this error:

Wed Dec 09 22:46:52 CET 2015 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

This is the test class with the main method:

public class TestDatabase {

    public static void main(String[] args) {
        Database db = new Database();
        try {
        } catch (Exception e) {

This is the Database class:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class Database {

    private Connection con;

    public void connect() throws Exception{

        if(con != null) return;

        try {
        } catch (ClassNotFoundException e) {
            throw new Exception("No database");

        String connectionURL = "jdbc:mysql://localhost:3306/Peoples";

        con = DriverManager.getConnection(connectionURL, "root", "milos23");        

    public void close(){
        if(con != null){
            try {
            } catch (SQLException e) {

An alternative method would be:

Properties properties = new Properties();
properties.setProperty("user", "root");
properties.setProperty("password", "milos23);
properties.setProperty("useSSL", "false");
properties.setProperty("autoReconnect", "true");

try (Connection conn = DriverManager.getConnection(connectionUrl, properties)) {
} catch (SQLException e) {

Although, I don't think the auto-reconnect setting is needed to remove the warning.

How about using SSL but turning off server verification (such as when in development mode on your own computer):


I use this property for hibernate in config xml

<property name="hibernate.connection.url">

without - serverTimezone=UTC - it doesn't work

Solution To fix it, append a useSSL=false at the end of the MySQL connection string :


mysql datasource


Use this to solve the problem in hive while making connection with MySQL

   <description>metadata is stored in a MySQL server</description>

Your connection URL should look like the below,


This will disable SSL and also suppress the SSL errors.

you need to user your mysql path like this:

<property name="url" value="jdbc:mysql://localhost:3306/world?useSSL=true"/>