[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT ID, VALUE FROM b_iblock_1_index_val WHERE ID IN(1,2,4,5,6,7,8,9,10,11,12,13,14,15)
/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/iblock/lib/propertyindex/dictionary.php:191
#2: Bitrix\Iblock\PropertyIndex\Dictionary->getStringByIds(array)
	/home/bitrix/www/local/components/bitrix/catalog.smart.filter/class.php:278
#3: CBitrixCatalogSmartFilter->processProperties(array, array, array, array)
	/home/bitrix/www/local/components/bitrix/catalog.smart.filter/component.php:133
#4: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#5: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:103
#6: CBitrixComponent->executeComponent()
	/home/bitrix/www/local/components/bitrix/catalog.smart.filter/class.php:130
#7: CBitrixCatalogSmartFilter->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#8: CBitrixComponent->includeComponent(string, array, object, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1037
#9: CAllMain->IncludeComponent(string, string, array, object, array)
	/home/bitrix/www/local/templates/artglass-main/components/bitrix/catalog/artcatalog/section_vertical.php:273
#10: include(string)
	/home/bitrix/www/local/templates/artglass-main/components/bitrix/catalog/artcatalog/section.php:100
#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, NULL, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1037
#19: CAllMain->IncludeComponent(string, string, array, NULL, array)
	/home/bitrix/www/catalog/index.php:335
#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