[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT * FROM `b_catalog_viewed_product` LIMIT 0
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string)
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqlcommonconnection.php:140
#1: Bitrix\Main\DB\MysqlCommonConnection->getTableFields(string)
	/home/bitrix/www/bitrix/modules/main/lib/db/sqlhelper.php:304
#2: Bitrix\Main\DB\SqlHelper->prepareInsert(string, array)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:448
#3: Bitrix\Main\DB\Connection->add(string, array, string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/data/datamanager.php:924
#4: Bitrix\Main\ORM\Data\DataManager::add(array)
	/home/bitrix/www/bitrix/modules/catalog/lib/catalogviewedproduct.php:231
#5: Bitrix\Catalog\CatalogViewedProductTable::refresh(integer, integer, string)
	/home/bitrix/www/bitrix/modules/sale/mysql/product.php:324
#6: CSaleViewedProduct::Add(array)
	/home/bitrix/www/bitrix/components/bitrix/catalog.element/class.php:246
#7: CatalogElementComponent->saveViewedProduct()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/element.php:277
#8: Bitrix\Iblock\Component\Element->initialLoadAction()
	
#9: call_user_func(array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4725
#10: Bitrix\Iblock\Component\Base->doAction()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4743
#11: Bitrix\Iblock\Component\Base->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#12: CBitrixComponent->includeComponent(string, array, object, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#13: CAllMain->IncludeComponent(string, string, array, object)
	/home/bitrix/www/bitrix/templates/magnet_s2/components/bitrix/catalog/main/element.php:235
#14: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:789
#15: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:884
#16: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:764
#17: CBitrixComponent->showComponentTemplate()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:712
#18: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/www/bitrix/components/bitrix/catalog/component.php:171
#19: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#20: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#21: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#22: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/ext_www/s2/index.php:782
#23: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#24: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2