[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: MySQL server has gone away (400)
SELECT 
	`catalog_catalog_iblock`.`IBLOCK_ID` AS `IBLOCK_ID`,
	`catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` AS `PRODUCT_IBLOCK_ID`,
	`catalog_catalog_iblock`.`SKU_PROPERTY_ID` AS `SKU_PROPERTY_ID`,
	`catalog_catalog_iblock_iblock`.`VERSION` AS `VERSION`
FROM `b_catalog_iblock` `catalog_catalog_iblock` 
INNER JOIN `b_iblock` `catalog_catalog_iblock_iblock` ON `catalog_catalog_iblock`.`IBLOCK_ID` = `catalog_catalog_iblock_iblock`.`ID`
WHERE `catalog_catalog_iblock`.`IBLOCK_ID` = 6
AND (`catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` IS NOT NULL AND `catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` <> 0)
/var/www/korallshops.ru/bitrix/modules/main/lib/db/mysqlconnection.php:104
#0: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
	/var/www/korallshops.ru/bitrix/modules/main/lib/db/connection.php:332
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/korallshops.ru/bitrix/modules/main/lib/entity/query.php:1749
#2: Bitrix\Main\Entity\Query->query(string)
	/var/www/korallshops.ru/bitrix/modules/main/lib/entity/query.php:454
#3: Bitrix\Main\Entity\Query->exec()
	/var/www/korallshops.ru/bitrix/modules/main/lib/entity/datamanager.php:230
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/var/www/korallshops.ru/bitrix/modules/catalog/general/catalog_sku.php:115
#5: CAllCatalogSKU::GetInfoByOfferIBlock(integer)
	/var/www/korallshops.ru/bitrix/modules/catalog/general/discount.php:903
#6: CAllCatalogDiscount::GetDiscount(string, string, array, array, string, string, array)
	/var/www/korallshops.ru/bitrix/modules/iblock/classes/general/comp_pricetools.php:258
#7: CIBlockPriceTools::GetItemPrices(integer, array, array, boolean, array)
	/var/www/korallshops.ru/bitrix/components/bitrix/catalog.element/component.php:820
#8: include(string)
	/var/www/korallshops.ru/bitrix/modules/main/classes/general/component.php:535
#9: CBitrixComponent->__includeComponent()
	/var/www/korallshops.ru/bitrix/modules/main/classes/general/component.php:578
#10: CBitrixComponent->includeComponent(string, array, boolean)
	/var/www/korallshops.ru/bitrix/modules/main/classes/general/main.php:1037
#11: CAllMain->IncludeComponent(string, string, array, boolean)
	/var/www/korallshops.ru/products/index.php:430
#12: include_once(string)
	/var/www/korallshops.ru/bitrix/modules/main/include/urlrewrite.php:156
#13: include_once(string)
	/var/www/korallshops.ru/bitrix/urlrewrite.php:2