[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`iblock_iblock_site`.`IBLOCK_ID` AS `IBLOCK_ID`
FROM `b_iblock_site` `iblock_iblock_site` 
LEFT JOIN `b_iblock` `iblock_iblock_site_iblock` ON `iblock_iblock_site`.`IBLOCK_ID` = `iblock_iblock_site_iblock`.`ID`
WHERE (`iblock_iblock_site`.`IBLOCK_ID` in (28))
AND `iblock_iblock_site`.`SITE_ID` = 's1'
AND `iblock_iblock_site_iblock`.`ACTIVE` = 'Y'
/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:329
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:2839
#2: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:777
#3: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:260
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:3587
#5: Bitrix\Iblock\Component\Base->checkIblock()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:3551
#6: Bitrix\Iblock\Component\Base->processResultData()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:90
#7: CatalogSectionComponent->processResultData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:3971
#8: Bitrix\Iblock\Component\Base->loadData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/elementlist.php:1058
#9: Bitrix\Iblock\Component\ElementList->loadData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:3960
#10: Bitrix\Iblock\Component\Base->initialLoadAction()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:327
#11: CatalogSectionComponent->initialLoadAction()
	
#12: call_user_func(array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4145
#13: Bitrix\Iblock\Component\Base->doAction()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4163
#14: Bitrix\Iblock\Component\Base->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:638
#15: CBitrixComponent->includeComponent(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1041
#16: CAllMain->IncludeComponent(string, string, array)
	/home/bitrix/www/bitrix/templates/lenoma/includes/left.php:254
#17: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1424
#18: CAllMain->IncludeFile(string, array, array)
	/home/bitrix/www/bitrix/templates/lenoma/header.php:939
#19: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_after.php:96
#20: require(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:11
#21: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#22: require(string)
	/home/bitrix/www/sredstva/detail.php:2
#23: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#24: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2