「java.sql.SQLException: ResultSet が閉じられた後は操作は許可されません」を解決する方法?

try {
    //Get some stuff
    String name = "";
    String sql = "SELECT `name` FROM `user` WHERE `id` = " + userId + " LIMIT 1;";
    ResultSet rs = statement.executeQuery(sql);
    if (rs.next()) {
        name = rs.getString("name");
    }
    rs.close();  // Close the ResultSet 'rs'

    String sql2 = "SELECT `id` FROM  `profiles` WHERE `id` =" + profId + ";";
    ResultSet rs2 = statement.executeQuery(sql2);
    String updateSql = "INSERT INTO `blah`............";
    PreparedStatement pst = (PreparedStatement) connection.prepareStatement(updateSql);

    while (rs2.next()) {
        int id = rs2.getInt("id");
        int stuff = getStuff(id);

        pst.setInt(1, stuff);
        pst.addBatch();
    }
    rs2.close();  // Close the ResultSet 'rs2'

    pst.executeBatch();

} catch (Exception e) {
    e.printStackTrace();
}

private int getStuff(int id) {

    try {
        String sql = "SELECT ......;";
        ResultSet rs = statement.executeQuery(sql);

        if (rs.next()) {
            int result = rs.getInt("something");
            rs.close();  // Close the ResultSet 'rs' in 'getStuff' method
            return result;
        }
        return -1;
    }//code continues
}