[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`sale_internals_discount_group`.`DISCOUNT_ID` AS `DISCOUNT_ID`,
	`sale_internals_discount_group`.`ID` AS `UALIAS_0`
FROM `b_sale_discount_group` `sale_internals_discount_group` 

WHERE `sale_internals_discount_group`.`GROUP_ID` IN (2)
AND `sale_internals_discount_group`.`ACTIVE` = 'Y'
ORDER BY `DISCOUNT_ID` ASC
/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/lib/orm/query/query.php:3304
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/lib/orm/query/query.php:816
#3: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/lib/orm/data/datamanager.php:500
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/sale/lib/discount/runtimecache/discountcache.php:53
#5: Bitrix\Sale\Discount\RuntimeCache\DiscountCache->getDiscountIds(array)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/classes/general/comp_pricetools.php:145
#6: CIBlockPriceTools::SetCatalogDiscountCache(array, array)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/lib/component/base.php:723
#7: Bitrix\Iblock\Component\Base->initPrices()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/lib/component/base.php:4044
#8: Bitrix\Iblock\Component\Base->processResultData()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/components/bitrix/catalog.section/class.php:92
#9: CatalogSectionComponent->processResultData()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/lib/component/base.php:4551
#10: Bitrix\Iblock\Component\Base->loadData()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/lib/component/elementlist.php:1232
#11: Bitrix\Iblock\Component\ElementList->loadData()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/lib/component/base.php:4540
#12: Bitrix\Iblock\Component\Base->initialLoadAction()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/components/bitrix/catalog.section/class.php:334
#13: CatalogSectionComponent->initialLoadAction()
	
#14: call_user_func(array)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/lib/component/base.php:4725
#15: Bitrix\Iblock\Component\Base->doAction()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/iblock/lib/component/base.php:4743
#16: Bitrix\Iblock\Component\Base->executeComponent()
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/classes/general/component.php:649
#17: CBitrixComponent->includeComponent(string, array, NULL)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/classes/general/main.php:1039
#18: CAllMain->IncludeComponent(string, string, array)
	/var/www/www-root/data/www/ermak-k.ru/brands/index.php:247
#19: include_once(string)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/modules/main/include/urlrewrite.php:159
#20: include_once(string)
	/var/www/www-root/data/www/ermak-k.ru/bitrix/urlrewrite.php:2