[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost, 127.0.0.1]: No such file or directory (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:43
#0: Bitrix\Main\DB\MysqlConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:91
#1: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:332
#2: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:1749
#3: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:454
#4: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:230
#5: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/www/bitrix/modules/catalog/general/catalog_sku.php:146
#6: CAllCatalogSKU::GetInfoByProductIBlock(integer)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/facet.php:45
#7: Bitrix\Iblock\PropertyIndex\Facet->__construct(integer)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/querybuilder.php:28
#8: Bitrix\Iblock\PropertyIndex\QueryBuilder->__construct(integer)
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:639
#9: CAllIBlockElement::MkFilter(array, array, array)
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:3009
#10: CAllIBlockElement::PrepareGetList(array, array, NULL, boolean, array, string, array, array, NULL, NULL, array, boolean, string, array, array, array, NULL, array, NULL, array, array, NULL)
	/home/bitrix/www/bitrix/modules/iblock/classes/mysql/iblockelement.php:361
#11: CIBlockElement::GetList(array, array, boolean, array, array)
	/home/bitrix/www/bitrix/php_interface/include/functions/iblock.php:380
#12: getMetroIDForCode(string)
	/home/bitrix/www/bitrix/php_interface/init.php:469
#13: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include.php:226
#14: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#15: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#16: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#17: require(string)
	/home/bitrix/www/services/buy/komnatu-ili-kvartiru/mo/kolomna/index.php:2