read error on connection

#0 /domains/startfitness.co.uk/http/app/code/community/Cm/Cache/Backend/Redis.php(472): Credis_Client->__call('hGet', Array)
#1 /domains/startfitness.co.uk/http/app/code/community/Cm/Cache/Backend/Redis.php(472): Credis_Client->hGet('zc:k:68b_STORE_...', 'd')
#2 /domains/startfitness.co.uk/http/lib/Zend/Cache/Core.php(303): Cm_Cache_Backend_Redis->load('68b_STORE_SFMOB...', false)
#3 /domains/startfitness.co.uk/http/lib/Varien/Cache/Core.php(158): Zend_Cache_Core->load('STORE_SFMOBILE_...', false, false)
#4 /domains/startfitness.co.uk/http/app/code/core/Mage/Core/Model/Cache.php(379): Varien_Cache_Core->load('STORE_SFMOBILE_...')
#5 /domains/startfitness.co.uk/http/app/code/core/Mage/Core/Model/App.php(1150): Mage_Core_Model_Cache->load('store_sfmobile_...')
#6 /domains/startfitness.co.uk/http/app/code/core/Mage/Core/Model/Store.php(350): Mage_Core_Model_App->loadCache('store_sfmobile_...')
#7 /domains/startfitness.co.uk/http/app/code/core/Mage/Core/Model/App.php(649): Mage_Core_Model_Store->initConfigCache()
#8 /domains/startfitness.co.uk/http/app/code/core/Mage/Core/Model/App.php(482): Mage_Core_Model_App->_initStores()
#9 /domains/startfitness.co.uk/http/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Model_App->_initCurrentStore('sfmobile', 'store')
#10 /domains/startfitness.co.uk/http/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#11 /domains/startfitness.co.uk/http/index.php(110): Mage::run('sfmobile', 'store')
#12 {main}