[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`iblock_element`.`ID` AS `ID`,
	`iblock_element`.`IBLOCK_ID` AS `IBLOCK_ID`
FROM `b_iblock_element` `iblock_element` 

WHERE `iblock_element`.`ID` IN (2129016,2129220,2129221,2129222,2129223,2129224,2129225,2129226,2137764)
/site/www/protsvet.ru/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/lib/orm/query/query.php:3190
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/lib/orm/query/query.php:806
#3: Bitrix\Main\ORM\Query\Query->exec()
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/lib/orm/data/datamanager.php:407
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/site/www/protsvet.ru/htdocs/bitrix/modules/catalog/lib/discount/discountmanager.php:1084
#5: Bitrix\Catalog\Discount\DiscountManager::getProductIblocks(array)
	/site/www/protsvet.ru/htdocs/bitrix/modules/catalog/lib/discount/discountmanager.php:684
#6: Bitrix\Catalog\Discount\DiscountManager::preloadProductDataToExtendOrder(array, array)
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:462
#7: Bitrix\Iblock\Component\Base->initCatalogDiscountCache()
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:3624
#8: Bitrix\Iblock\Component\Base->prepareData()
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:3578
#9: Bitrix\Iblock\Component\Base->processResultData()
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/element.php:243
#10: Bitrix\Iblock\Component\Element->processResultData()
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4032
#11: Bitrix\Iblock\Component\Base->loadData()
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4021
#12: Bitrix\Iblock\Component\Base->initialLoadAction()
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/element.php:228
#13: Bitrix\Iblock\Component\Element->initialLoadAction()
	
#14: call_user_func(array)
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4206
#15: Bitrix\Iblock\Component\Base->doAction()
	/site/www/protsvet.ru/htdocs/bitrix/modules/iblock/lib/component/base.php:4224
#16: Bitrix\Iblock\Component\Base->executeComponent()
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/component.php:638
#17: CBitrixComponent->includeComponent(string, array, object)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/main.php:1037
#18: CAllMain->IncludeComponent(string, string, array, object)
	/site/www/protsvet.ru/htdocs/local/templates/.default/components/bitrix/catalog/catalog/element.php:149
#19: include(string)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/component_template.php:720
#20: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/component_template.php:815
#21: CBitrixComponentTemplate->IncludeTemplate(array)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/component.php:735
#22: CBitrixComponent->showComponentTemplate()
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/component.php:683
#23: CBitrixComponent->includeComponentTemplate(string)
	/site/www/protsvet.ru/htdocs/bitrix/components/bitrix/catalog/component.php:171
#24: include(string)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/component.php:594
#25: CBitrixComponent->__includeComponent()
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/component.php:653
#26: CBitrixComponent->includeComponent(string, array, boolean)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/classes/general/main.php:1037
#27: CAllMain->IncludeComponent(string, string, array, boolean, array)
	/site/www/protsvet.ru/htdocs/catalog/index.php:297
#28: include_once(string)
	/site/www/protsvet.ru/htdocs/bitrix/modules/main/include/urlrewrite.php:159
#29: include_once(string)
	/site/www/protsvet.ru/htdocs/bitrix/urlrewrite.php:2