Front controller reached 100 router match iterations

#0 /var/www/clients/client1/web1/web/shop/app/code/core/Mage/Core/Controller/Varien/Front.php(183): Mage::throwException('Front controlle...')
#1 /var/www/clients/client1/web1/web/shop/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#2 /var/www/clients/client1/web1/web/shop/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#3 /var/www/clients/client1/web1/web/shop/index.php(131): Mage::run('base', 'website')
#4 {main}