[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (1040) Too many connections (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:64
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:121
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:3357
#3: Bitrix\Main\ORM\Query\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:825
#4: Bitrix\Main\ORM\Query\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/orm/data/datamanager.php:500
#5: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/home/bitrix/www/bitrix/components/bitrix/catalog.smart.filter/class.php:111
#6: CBitrixCatalogSmartFilter->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#7: CBitrixComponent->includeComponent(string, array, object, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#8: CAllMain->IncludeComponent(string, string, array, object, array)
	/home/bitrix/www/bitrix/components/bitrix/catalog/templates/bootstrap_v4/section_vertical.php:247
#9: include(string)
	/home/bitrix/www/bitrix/components/bitrix/catalog/templates/bootstrap_v4/section.php:83
#10: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:789
#11: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:884
#12: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:764
#13: CBitrixComponent->showComponentTemplate()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:712
#14: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/www/bitrix/components/bitrix/catalog/component.php:171
#15: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#16: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#17: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#18: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/www/catalog/index.php:427
#19: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#20: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2