[Bitrix\Main\DB\SqlQueryException]
Mysql query error: (2006) MySQL server has gone away (400)
SELECT
`catalog_catalog_iblock`.`IBLOCK_ID` AS `IBLOCK_ID`,
`catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` AS `PRODUCT_IBLOCK_ID`,
`catalog_catalog_iblock`.`SKU_PROPERTY_ID` AS `SKU_PROPERTY_ID`,
`catalog_catalog_iblock_iblock`.`VERSION` AS `VERSION`,
`catalog_catalog_iblock_iblock`.`ID` AS `UALIAS_0`
FROM `b_catalog_iblock` `catalog_catalog_iblock`
INNER JOIN `b_iblock` `catalog_catalog_iblock_iblock` ON `catalog_catalog_iblock`.`IBLOCK_ID` = `catalog_catalog_iblock_iblock`.`ID`
WHERE `catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` = 4
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/lib/db/mysqliconnection.php:146
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/lib/db/connection.php:327
#1: Bitrix\Main\DB\Connection->query(string)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/lib/orm/query/query.php:3555
#2: Bitrix\Main\ORM\Query\Query->query(string)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/lib/orm/query/query.php:952
#3: Bitrix\Main\ORM\Query\Query->exec()
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/lib/orm/data/datamanager.php:513
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
/home/bitrix/ext_www/slavia.by/bitrix/modules/catalog/general/catalog_sku.php:151
#5: CCatalogSku::GetInfoByProductIBlock(integer)
/home/bitrix/ext_www/slavia.by/local/components/bitrix/catalog.smart.filter/class.php:119
#6: CBitrixCatalogSmartFilter->executeComponent()
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/component.php:660
#7: CBitrixComponent->includeComponent(string, array, object, boolean)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/main.php:1068
#8: CAllMain->IncludeComponent(string, string, array, object, array)
/home/bitrix/ext_www/slavia.by/local/templates/slavia_v2/components/bitrix/catalog/.default/section_vertical.php:216
#9: include(string)
/home/bitrix/ext_www/slavia.by/local/templates/slavia_v2/components/bitrix/catalog/.default/section.php:331
#10: include(string)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/component_template.php:790
#11: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/component_template.php:885
#12: CBitrixComponentTemplate->IncludeTemplate(array)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/component.php:775
#13: CBitrixComponent->showComponentTemplate()
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/component.php:716
#14: CBitrixComponent->includeComponentTemplate(string)
/home/bitrix/ext_www/slavia.by/bitrix/components/bitrix/catalog/component.php:171
#15: include(string)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/component.php:607
#16: CBitrixComponent->__includeComponent()
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/component.php:684
#17: CBitrixComponent->includeComponent(string, array, boolean, boolean)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/classes/general/main.php:1068
#18: CAllMain->IncludeComponent(string, string, array, boolean)
/home/bitrix/ext_www/slavia.by/catalog/catalog.php:297
#19: include_once(string)
/home/bitrix/ext_www/slavia.by/bitrix/modules/main/include/urlrewrite.php:160
#20: include_once(string)
/home/bitrix/ext_www/slavia.by/bitrix/urlrewrite.php:2