[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` = 36
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:149
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:331
#1: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:3557
#2: Bitrix\Main\ORM\Query\Query->query
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:952
#3: Bitrix\Main\ORM\Query\Query->exec
	/home/bitrix/www/bitrix/modules/main/lib/orm/data/datamanager.php:513
#4: Bitrix\Main\ORM\Data\DataManager::getList
	/home/bitrix/www/bitrix/modules/catalog/general/catalog_sku.php:149
#5: CCatalogSku::GetInfoByProductIBlock
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/facet.php:45
#6: Bitrix\Iblock\PropertyIndex\Facet->__construct
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/querybuilder.php:31
#7: Bitrix\Iblock\PropertyIndex\QueryBuilder->__construct
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:1091
#8: CAllIBlockElement->MkFilter
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:3599
#9: CAllIBlockElement->PrepareGetList
	/home/bitrix/www/bitrix/modules/iblock/classes/mysql/iblockelement.php:105
#10: CIBlockElement->prepareSql
	/home/bitrix/www/bitrix/modules/iblock/classes/mysql/iblockelement.php:476
#11: CIBlockElement::GetList
	/home/bitrix/www/bitrix/php_interface/include/ctweb/seo.php:43
#12: ctweb\seo::getMetaTags
	/home/bitrix/www/bitrix/php_interface/include/ctweb/seo.php:34
#13: ctweb\seo::construct
	/home/bitrix/www/bitrix/php_interface/init.php:83
#14: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include.php:123
#15: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:19
#16: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#17: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#18: require(string)
	/home/bitrix/www/catalog/index.php:1
#19: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:184
#20: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2
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