[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost, 127.0.0.1]: Connection refused (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:50
#0: Bitrix\Main\DB\MysqlConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:103
#1: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#2: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:3038
#3: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:797
#4: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:290
#5: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/www/bitrix/php_interface/init.php:99
#6: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include.php:234
#7: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#8: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#9: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#10: require(string)
	/home/bitrix/www/catalog/index.php:2
#11: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#12: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2