[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`catalog_group_access`.`CATALOG_GROUP_ID` AS `CATALOG_GROUP_ID`
FROM `b_catalog_group2group` `catalog_group_access` 

WHERE `catalog_group_access`.`GROUP_ID` = 2
AND `catalog_group_access`.`BUY` = 'Y'
ORDER BY `CATALOG_GROUP_ID` ASC
/var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/orm/query/query.php:3190
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/orm/query/query.php:806
#3: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/orm/data/datamanager.php:457
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/kssmarket.ru/htdocs/bitrix/components/bitrix/catalog.element/class.php:120
#5: CatalogElementComponent->initAdditionalCacheKeys(array)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/iblock/lib/component/element.php:688
#6: Bitrix\Iblock\Component\Element->getCacheKeys()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:3548
#7: Bitrix\Iblock\Component\Base->initResultCache()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4041
#8: Bitrix\Iblock\Component\Base->loadData()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4021
#9: Bitrix\Iblock\Component\Base->initialLoadAction()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/iblock/lib/component/element.php:228
#10: Bitrix\Iblock\Component\Element->initialLoadAction()
	
#11: call_user_func(array)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4206
#12: Bitrix\Iblock\Component\Base->doAction()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4224
#13: Bitrix\Iblock\Component\Base->executeComponent()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/component.php:638
#14: CBitrixComponent->includeComponent(string, array, NULL)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/main.php:1037
#15: CAllMain->IncludeComponent(string, string, array)
	/var/www/kssmarket.ru/htdocs/local/templates/letsrock/components/freematiq/main.include/catalog_item/template.php:42
#16: include(string)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/component_template.php:720
#17: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/component_template.php:815
#18: CBitrixComponentTemplate->IncludeTemplate(array)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/component.php:735
#19: CBitrixComponent->showComponentTemplate()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/component.php:683
#20: CBitrixComponent->includeComponentTemplate()
	/var/www/kssmarket.ru/htdocs/local/components/freematiq/main.include/class.php:7
#21: VariableSet->executeComponent()
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/component.php:638
#22: CBitrixComponent->includeComponent(string, array, NULL)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/classes/general/main.php:1037
#23: CAllMain->IncludeComponent(string, string, array)
	/var/www/kssmarket.ru/htdocs/item/index.php:138
#24: include_once(string)
	/var/www/kssmarket.ru/htdocs/bitrix/modules/main/include/urlrewrite.php:159
#25: include_once(string)
	/var/www/kssmarket.ru/htdocs/bitrix/urlrewrite.php:2

Fatal error: Uncaught Bitrix\Main\DB\SqlQueryException: Mysql query error: (2006) MySQL server has gone away in /var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php:137 Stack trace: #0 /var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/db/connection.php(330): Bitrix\Main\DB\MysqliConnection->queryInternal('SELECT \n\t`sale_...', Array, NULL) #1 /var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/orm/query/query.php(3190): Bitrix\Main\DB\Connection->query('SELECT \n\t`sale_...') #2 /var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/orm/query/query.php(806): Bitrix\Main\ORM\Query\Query->query('SELECT \n\t`sale_...') #3 /var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/orm/data/datamanager.php(457): Bitrix\Main\ORM\Query\Query->exec() #4 /var/www/kssmarket.ru/htdocs/bitrix/modules/pecom.ecomm/classes/lib/Bitrix/Handler/deliveries.php(69): Bitrix\Main\ORM\Data\DataManager::getList(Array) #5 /var/www/kssmarket.ru/htdocs/bitrix/modules/pecom.ecomm/classes/lib/Bitrix/Handler/deliveries.php(77): Ip in /var/www/kssmarket.ru/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php on line 137