mysqli_query(): MySQL server has gone away

[21-Nov-2021 19:07:43 UTC] PHP Warning: mysqli_query(): MySQL server has gone away in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057
[21-Nov-2021 19:07:45 UTC] PHP Warning: mysqli_query(): Error reading result set’s header in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057
[21-Nov-2021 19:08:20 UTC] PHP Warning: mysqli_query(): MySQL server has gone away in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057
[21-Nov-2021 19:08:21 UTC] PHP Warning: mysqli_query(): Error reading result set’s header in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057
[21-Nov-2021 19:08:21 UTC] PHP Warning: mysqli_query(): MySQL server has gone away in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057
[21-Nov-2021 19:08:23 UTC] PHP Warning: mysqli_query(): Error reading result set’s header in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057
[21-Nov-2021 19:08:48 UTC] PHP Warning: mysqli_query(): MySQL server has gone away in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057
[21-Nov-2021 19:08:49 UTC] PHP Warning: mysqli_query(): Error reading result set’s header in /data/home/xyu4398740001/htdocs/wp-includes/wp-db.php on line 2057

* Internal function to perform the mysql_query() call.
	 *
	 * @since 3.9.0
	 *
	 * @see wpdb::query()
	 *
	 * @param string $query The query to run.
	 */
	private function _do_query( $query ) {
		if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
			$this->timer_start();
		}

		if ( ! empty( $this->dbh ) && $this->use_mysqli ) {
2057			$this->result = mysqli_query( $this->dbh, $query );
		} elseif ( ! empty( $this->dbh ) ) {
			$this->result = mysql_query( $query, $this->dbh );
		}
		$this->num_queries++;

		if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
			$this->log_query(
				$query,
				$this->timer_stop(),
				$this->get_caller(),
				$this->time_start,
				array()
			);
		}
	}