[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [127.0.0.1:3306]: (1040) Too many connections (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/local/php_interface/init.php:4
#3: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include.php:241
#4: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#5: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#6: require_once(string)
	/home/bitrix/www/bitrix/header.php:17
#7: require(string)
	/home/bitrix/www/catalog/index.php:2
#8: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#9: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2