cache_dir "/var/www/html/var/cache" must be a directory

#0 /var/www/html/lib/Zend/Cache/Backend/File.php(177): Zend_Cache::throwException('cache_dir "/var...')
#1 /var/www/html/lib/Zend/Cache/Backend/File.php(128): Zend_Cache_Backend_File->setCacheDir('/var/www/html/v...')
#2 /var/www/html/lib/Zend/Cache.php(153): Zend_Cache_Backend_File->__construct(Array)
#3 /var/www/html/lib/Zend/Cache.php(94): Zend_Cache::_makeBackend('File', Array, true, true)
#4 /var/www/html/app/code/core/Mage/Core/Model/Cache.php(137): Zend_Cache::factory('Varien_Cache_Co...', 'File', Array, Array, true, true, true)
#5 /var/www/html/app/code/core/Mage/Core/Model/Config.php(1357): Mage_Core_Model_Cache->__construct(Array)
#6 /var/www/html/app/Mage.php(466): Mage_Core_Model_Config->getModelInstance('core/cache', Array)
#7 /var/www/html/app/code/core/Mage/Core/Model/App.php(412): Mage::getModel('core/cache', Array)
#8 /var/www/html/app/code/core/Mage/Core/Model/App.php(306): Mage_Core_Model_App->_initCache(Array)
#9 /var/www/html/app/code/core/Mage/Core/Model/App.php(348): Mage_Core_Model_App->baseInit(Array)
#10 /var/www/html/app/Mage.php(687): Mage_Core_Model_App->run(Array)
#11 /var/www/html/index.php(86): Mage::run('', 'store')
#12 {main}