[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`.`PRODUCT_IBLOCK_ID` = 12
/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:143
#5: CAllCatalogSku::GetInfoByProductIBlock
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/propertyindex/facet.php:45
#6: Bitrix\Iblock\PropertyIndex\Facet->__construct
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/lib/propertyindex/querybuilder.php:28
#7: Bitrix\Iblock\PropertyIndex\QueryBuilder->__construct
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/classes/general/iblockelement.php:662
#8: CAllIBlockElement->MkFilter
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/classes/general/iblockelement.php:3095
#9: CAllIBlockElement->PrepareGetList
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/classes/mysql/iblockelement.php:326
#10: CIBlockElement->prepareSql
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/iblock/classes/mysql/iblockelement.php:666
#11: CIBlockElement::GetList
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/components/bitrix/catalog.section.list/component.php:317
#12: include(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:605
#13: CBitrixComponent->__includeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:680
#14: CBitrixComponent->includeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/main.php:1063
#15: CAllMain->IncludeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/templates/os/components/bitrix/catalog/al/sections.php:218
#16: include(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component_template.php:789
#17: CBitrixComponentTemplate->__IncludePHPTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component_template.php:884
#18: CBitrixComponentTemplate->IncludeTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:764
#19: CBitrixComponent->showComponentTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:712
#20: CBitrixComponent->includeComponentTemplate
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/components/bitrix/catalog/component.php:171
#21: include(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:605
#22: CBitrixComponent->__includeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/component.php:680
#23: CBitrixComponent->includeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/classes/general/main.php:1063
#24: CAllMain->IncludeComponent
	/home/kanzoptima/web/kanzoptima.ru/public_html/catalog/index.php:279
#25: include_once(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/modules/main/include/urlrewrite.php:159
#26: include_once(string)
	/home/kanzoptima/web/kanzoptima.ru/public_html/bitrix/urlrewrite.php:2