Példa

import java.sql.*;
import javax.sql.*;

public class ClassA {
public void method(){
Connection con = null;
Connection con2 = null;
try {
con = DriverManager.getConnection("adatbázis URL");
con2 = DataSource.getConnection("adatbázis URL");
}
finally {
}
}
}


Megoldás
Minden nyitott JDBC kapcsolatot le kell zárni a finally() blokkban.

import java.sql.*;
import javax.sql.*;

public class ClassA {
public void method(){
Connection con = null;
Connection con2 = null;
try {
con = DriverManager.getConnection("adatbázis URL");
con2 = DataSource.getConnection("adatbázis URL");
}
finally {
con.close();
con2.close();
}
}
}