Beispiel

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

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


Lösung
Alle geöffenten JDBC-Verbindungen müssen im Block 'finally()' geschlossen werden.

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

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