[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) 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`,
	`catalog_catalog_iblock_iblock`.`ID` AS `UALIAS_0`
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` = 12
AND (`catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` IS NOT NULL AND `catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` <> 0)
/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/lib/orm/query/query.php:3538
#2: Bitrix\Main\ORM\Query\Query->query
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/lib/orm/query/query.php:949
#3: Bitrix\Main\ORM\Query\Query->exec
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/lib/orm/data/datamanager.php:500
#4: Bitrix\Main\ORM\Data\DataManager::getList
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/catalog/general/catalog_sku.php:113
#5: CAllCatalogSku::GetInfoByOfferIBlock
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/catalog/general/discount.php:1411
#6: CAllCatalogDiscount::GetDiscount
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:3058
#7: Bitrix\Iblock\Component\Base->calculatePriceBlock
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:2842
#8: Bitrix\Iblock\Component\Base->calculateItemPrices
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:3592
#9: Bitrix\Iblock\Component\Base->processProducts
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:4100
#10: Bitrix\Iblock\Component\Base->prepareData
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:4053
#11: Bitrix\Iblock\Component\Base->processResultData
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/components/bitrix/catalog.section/class.php:92
#12: CatalogSectionComponent->processResultData
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:4551
#13: Bitrix\Iblock\Component\Base->loadData
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/elementlist.php:1232
#14: Bitrix\Iblock\Component\ElementList->loadData
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:4540
#15: Bitrix\Iblock\Component\Base->initialLoadAction
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/components/bitrix/catalog.section/class.php:334
#16: CatalogSectionComponent->initialLoadAction
	
#17: call_user_func
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:4725
#18: Bitrix\Iblock\Component\Base->doAction
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/component/base.php:4743
#19: Bitrix\Iblock\Component\Base->executeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:656
#20: CBitrixComponent->includeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/main.php:1063
#21: CAllMain->IncludeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/templates/os/components/bitrix/catalog/al/sections.php:361
#22: include(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component_template.php:789
#23: CBitrixComponentTemplate->__IncludePHPTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component_template.php:884
#24: CBitrixComponentTemplate->IncludeTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:764
#25: CBitrixComponent->showComponentTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:712
#26: CBitrixComponent->includeComponentTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/components/bitrix/catalog/component.php:171
#27: include(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:605
#28: CBitrixComponent->__includeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:680
#29: CBitrixComponent->includeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/main.php:1063
#30: CAllMain->IncludeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/catalog/index.php:279
#31: include_once(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/include/urlrewrite.php:159
#32: include_once(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/urlrewrite.php:2