[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [mysql]: (2002) php_network_getaddresses: getaddrinfo failed: Name or service not known (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/data/connection.php:53
#1: Bitrix\Main\Data\Connection->getResource()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqlisqlhelper.php:21
#2: Bitrix\Main\DB\MysqliSqlHelper->forSql(string)
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqlcommonconnection.php:48
#3: Bitrix\Main\DB\MysqlCommonConnection->isTableExists(string)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/dictionary.php:54
#4: Bitrix\Iblock\PropertyIndex\Dictionary->isExists()
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/facet.php:57
#5: Bitrix\Iblock\PropertyIndex\Facet->__construct(string)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/querybuilder.php:28
#6: Bitrix\Iblock\PropertyIndex\QueryBuilder->__construct(string)
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:639
#7: CAllIBlockElement::MkFilter(array, array, array)
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:3012
#8: 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:365
#9: CIBlockElement::GetList(array, array, boolean, boolean, array)
	/home/bitrix/www/bitrix/php_interface/include/classes/Cert.php:100
#10: Cert::GetListCert(array)
	/home/bitrix/www/bitrix/php_interface/include/classes/Cert.php:119
#11: Cert::isCertActive(string)
	/home/bitrix/www/bitrix/php_interface/include/classes/Cert.php:217
#12: Cert::getCertIdByUrl(string)
	/home/bitrix/www/bitrix/php_interface/init.php:259
#13: cityRoutine()
	/home/bitrix/www/bitrix/php_interface/init.php:103
#14: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include.php:234
#15: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#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_new.php:7
#19: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#20: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2