[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SHOW TABLES LIKE 'b_iblock_20_index_val'
/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/lib/db/mysqlcommonconnection.php:37
#2: Bitrix\Main\DB\MysqlCommonConnection->isTableExists
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/iblock/lib/propertyindex/dictionary.php:54
#3: Bitrix\Iblock\PropertyIndex\Dictionary->isExists
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/iblock/lib/propertyindex/facet.php:57
#4: Bitrix\Iblock\PropertyIndex\Facet->__construct
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/iblock/lib/propertyindex/querybuilder.php:28
#5: Bitrix\Iblock\PropertyIndex\QueryBuilder->__construct
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/iblock/classes/general/iblockelement.php:662
#6: CAllIBlockElement->MkFilter
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/iblock/classes/general/iblockelement.php:3095
#7: CAllIBlockElement->PrepareGetList
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/iblock/classes/mysql/iblockelement.php:326
#8: CIBlockElement->prepareSql
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/iblock/classes/mysql/iblockelement.php:666
#9: CIBlockElement::GetList
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/components/bitrix/catalog.section.list/component.php:234
#10: include(string)
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component.php:605
#11: CBitrixComponent->__includeComponent
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component.php:680
#12: CBitrixComponent->includeComponent
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/main.php:1063
#13: CAllMain->IncludeComponent
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/templates/citrus_aproduction2/components/bitrix/catalog/.default/section.php:34
#14: include(string)
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component_template.php:789
#15: CBitrixComponentTemplate->__IncludePHPTemplate
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component_template.php:884
#16: CBitrixComponentTemplate->IncludeTemplate
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component.php:764
#17: CBitrixComponent->showComponentTemplate
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component.php:712
#18: CBitrixComponent->includeComponentTemplate
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/components/bitrix/catalog/component.php:171
#19: include(string)
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component.php:605
#20: CBitrixComponent->__includeComponent
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/component.php:680
#21: CBitrixComponent->includeComponent
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/classes/general/main.php:1063
#22: CAllMain->IncludeComponent
	/home/ati/web/rti-ati.com.ua/public_html/ru/produktsiya/index.php:110
#23: include_once(string)
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/modules/main/include/urlrewrite.php:159
#24: include_once(string)
	/home/ati/web/rti-ati.com.ua/public_html/bitrix/urlrewrite.php:2