Adding to cart: E_ERROR: Allowed memory size of 2147483648 bytes exhausted (tried to allocate 24 bytes)

Question

We're seeing in new relic some reports of the below when users are adding items to the cart:

E_ERROR: Allowed memory size of 2147483648 bytes exhausted (tried to allocate 24 bytes)
in Varien_Simplexml_Element::descend called at /var/www/vhosts/www.domain.com/html/lib/Varien/Simplexml/Element.php (195)
in Varien_Simplexml_Element::descend called at /var/www/vhosts/www.domain.com/html/lib/Varien/Simplexml/Config.php (153)
in Varien_Simplexml_Config::getNode called at /var/www/vhosts/www.domain.com/html/app/code/local/Mage/Core/Model/Config.php (671)
in Mage_Core_Model_Config::getNode called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Catalog/Helper/Data.php (298)
in Mage_Catalog_Helper_Data::getOldFieldMap called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Catalog/Model/Product.php (129)
in Mage_Catalog_Model_Product::_initOldFieldsMap called at /var/www/vhosts/www.domain.com/html/lib/Varien/Object.php (100)
in Varien_Object::__construct called at /var/www/vhosts/www.domain.com/html/lib/Varien/Data/Collection.php (562)
in Varien_Data_Collection::getNewEmptyItem called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Catalog/Model/Resource/Product/Collection.php (406)
in Mage_Catalog_Model_Resource_Product_Collection::getNewEmptyItem called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php (1053)
in Mage_Eav_Model_Entity_Collection_Abstract::_loadEntities called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php (871)
in Mage_Eav_Model_Entity_Collection_Abstract::load called at /var/www/vhosts/www.domain.com/html/lib/Varien/Data/Collection.php (741)
in Varien_Data_Collection::getIterator called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Catalog/Model/Resource/Product/Collection.php (1495)
in Mage_Catalog_Model_Resource_Product_Collection::addOptionsToResult called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Sales/Model/Resource/Quote/Item/Collection.php (182)
in Mage_Sales_Model_Resource_Quote_Item_Collection::_assignProducts called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Sales/Model/Resource/Quote/Item/Collection.php (139)
in Mage_Sales_Model_Resource_Quote_Item_Collection::_afterLoad called at /var/www/vhosts/www.domain.com/html/lib/Varien/Data/Collection/Db.php (581)
in Varien_Data_Collection_Db::load called at /var/www/vhosts/www.domain.com/html/lib/Varien/Data/Collection.php (741)
in Varien_Data_Collection::getIterator called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Sales/Model/Quote.php (1697)
in Mage_Sales_Model_Quote::isVirtual called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Sales/Model/Quote/Address.php (489)
in Mage_Sales_Model_Quote_Address::getAllItems called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Sales/Model/Quote/Address.php (541)
in Mage_Sales_Model_Quote_Address::getAllNominalItems called at /var/www/vhosts/www.domain.com/html/app/code/core/Mage/Sales/Model/Quote/Address/Total/Nominal/RecurringAbstract.php (98)

Any ideas, please?

I have no idea what can be causing this and google is not turning up much!

Answer 1

check in /app/code/core/Mage/Core/Model/Config.php what is the value of $path passed to return parent::getNode($path); at line 298.

plus check that the file app/code/local/Mage/Core/Model/Config.php is the original one because on my magento 1.9.2.4 that call is on line 667 instead of 671