Fatal error: Uncaught Exception: Failed to get a connection after 3 retries. in /home/song/htdocs/www.song.lk/private/oop/mysqli_connection_pool.php:73 Stack trace: #0 /home/song/htdocs/www.song.lk/private/oop/db_connection.php(17): mysqli_connection_pool->get_connection() #1 /home/song/htdocs/www.song.lk/private/oop/db_connection.php(48): db_connection::get_connection() #2 /home/song/htdocs/www.song.lk/private/oop/class_song.php(153): db_connection::query() #3 /home/song/htdocs/www.song.lk/private/oop/class_song.php(161): Song->get_max_id() #4 /home/song/htdocs/www.song.lk/index.php(15): Song->get_popular_songs() #5 {main} thrown in /home/song/htdocs/www.song.lk/private/oop/mysqli_connection_pool.php on line 73