Unable to read response, or response is empty

#0 /var/www/magento/lib/Redarea/Utility/JsonRpcClient.php(77): Zend_Http_Client->request()
#1 /var/www/magento/app/code/local/Rikorda/Core/Helper/Data.php(354): Redarea_Utility_JsonRpcClient->sendRequest('Cart.getCart', Array)
#2 /var/www/magento/app/code/local/Rikorda/Core/Block/Redareawidget/Cartheader.php(160): Rikorda_Core_Helper_Data->getCart(NULL, NULL, 0, false, false, true)
#3 /var/www/magento/app/code/local/Rikorda/Core/Block/Redareawidget/Cartheader.php(108): Rikorda_Core_Block_Redareawidget_Cartheader->_getRealCartItems()
#4 /var/www/magento/app/design/frontend/rikorda/default/template/checkout/cart/cartheader.phtml(11): Rikorda_Core_Block_Redareawidget_Cartheader->getSummaryCount()
#5 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/magent...')
#6 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/rikord...')
#7 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#8 /var/www/magento/app/code/local/Rikorda/Core/Block/Redareawidget/Cartheader.php(154): Mage_Core_Block_Template->_toHtml()
#9 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(919): Rikorda_Core_Block_Redareawidget_Cartheader->_toHtml()
#10 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(637): Mage_Core_Block_Abstract->toHtml()
#11 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(581): Mage_Core_Block_Abstract->_getChildHtml('topCart', true)
#12 /var/www/magento/app/design/frontend/rikorda/default/template/page/html/header.phtml(88): Mage_Core_Block_Abstract->getChildHtml('topCart')
#13 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/magent...')
#14 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/rikord...')
#15 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#16 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(919): Mage_Core_Block_Template->_toHtml()
#17 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(637): Mage_Core_Block_Abstract->toHtml()
#18 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(581): Mage_Core_Block_Abstract->_getChildHtml('header', true)
#19 /var/www/magento/app/design/frontend/rikorda/default/template/page/1column.phtml(16): Mage_Core_Block_Abstract->getChildHtml('header')
#20 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/magent...')
#21 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/rikord...')
#22 /var/www/magento/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#23 /var/www/magento/app/code/core/Mage/Core/Block/Abstract.php(919): Mage_Core_Block_Template->_toHtml()
#24 /var/www/magento/app/code/core/Mage/Core/Model/Layout.php(555): Mage_Core_Block_Abstract->toHtml()
#25 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput()
#26 /var/www/magento/app/code/local/Rikorda/Public/controllers/StoreLocatorController.php(13): Mage_Core_Controller_Varien_Action->renderLayout()
#27 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Rikorda_Public_StoreLocatorController->puntivenditaAction()
#28 /var/www/magento/app/code/local/Rikorda/Core/Controller/Router.php(137): Mage_Core_Controller_Varien_Action->dispatch('puntivendita')
#29 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Rikorda_Core_Controller_Router->match(Object(Mage_Core_Controller_Request_Http))
#30 /var/www/magento/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#31 /var/www/magento/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#32 /var/www/magento/index.php(187): Mage::run('', 'store')
#33 {main}