[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)

				SELECT TAG
				FROM b_cache_tag
				WHERE SITE_ID = 's2'
				AND CACHE_SALT = '/59d'
				AND RELATIVE_PATH = '/opt_markmodelsfilter'
			
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/data/taggedcache.php:55
#2: Bitrix\Main\Data\TaggedCache->initDbCache(string)
	/home/bitrix/www/bitrix/modules/main/lib/data/taggedcache.php:107
#3: Bitrix\Main\Data\TaggedCache->endTagCache()
	/home/bitrix/www/bitrix/modules/main/classes/general/cache.php:463
#4: CCacheManager->EndTagCache()
	/home/bitrix/www/local/components/opt/catalog.smart.filter/component.php:943
#5: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#6: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:103
#7: CBitrixComponent->executeComponent()
	/home/bitrix/www/local/components/opt/catalog.smart.filter/class.php:129
#8: CBitrixCatalogSmartFilter->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#9: CBitrixComponent->includeComponent(string, array, object, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1041
#10: CAllMain->IncludeComponent(string, string, array, object, array)
	/home/bitrix/www/local/templates/opt_new/components/bitrix/catalog/catalog/section.php:79
#11: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:789
#12: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:884
#13: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:764
#14: CBitrixComponent->showComponentTemplate()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:712
#15: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/www/bitrix/components/bitrix/catalog/component.php:171
#16: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#17: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#18: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1041
#19: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/www/catalog/index.php:139
#20: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#21: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2