Практикумы для 10-го класса

[MongoConnectionException] 
Failed to connect to: localhost:27017: Previous connection attempts failed, server blacklisted (71)
/srv/www/drofa-ventana.ru/htdocs/local/components/drofa/elements.list/templates/books/result_modifier.php:13
#0: Mongo->__construct()
	/srv/www/drofa-ventana.ru/htdocs/local/components/drofa/elements.list/templates/books/result_modifier.php:13
#1: include(string)
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/classes/general/component_template.php:868
#2: CBitrixComponentTemplate->__IncludeMutatorFile(array, array)
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/classes/general/component_template.php:775
#3: CBitrixComponentTemplate->IncludeTemplate(array)
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/classes/general/component.php:681
#4: CBitrixComponent->showComponentTemplate()
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/classes/general/component.php:629
#5: CBitrixComponent->includeComponentTemplate()
	/srv/www/drofa-ventana.ru/htdocs/local/components/drofa/elements.list/component.php:176
#6: include(string)
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/classes/general/component.php:548
#7: CBitrixComponent->__includeComponent()
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/classes/general/component.php:600
#8: CBitrixComponent->includeComponent(string, array, boolean)
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/classes/general/main.php:1035
#9: CAllMain->IncludeComponent(string, string, array, boolean)
	/srv/www/drofa-ventana.ru/htdocs/catalog/index.php:168
#10: include_once(string)
	/srv/www/drofa-ventana.ru/htdocs/bitrix/modules/main/include/urlrewrite.php:159
#11: include_once(string)
	/srv/www/drofa-ventana.ru/htdocs/bitrix/urlrewrite.php:2