Session Problem: Uncaught Zend_Session_Exception: Zend_Session::start()

FATAL: E1027 - PHP E_ERROR: Uncaught Zend_Session_Exception: Zend_Session::start() - /webs/shared-translate5-instance-files/zend/Zend/Session.php(Line:486): Error #2 session_start(): Failed to read session data: user (path: /var/lib/php/sessions) in /webs/shared-translate5-instance-files/zend/Zend/Session.php:499

in core /webs/shared-translate5-instance-files/zend/Zend/Session.php (499)
Request: GET /login
Trace:
Stack trace:
#0 /webs/demo.translate5.net/library/ZfExtended/Resource/Session.php(82): Zend_Session::start()
#1 /webs/shared-translate5-instance-files/zend/Zend/Application/Bootstrap/BootstrapAbstract.php(695): ZfExtended_Resource_Session->init()
#2 /webs/shared-translate5-instance-files/zend/Zend/Application/Bootstrap/BootstrapAbstract.php(638): Zend_Application_Bootstrap_BootstrapAbstract->_executeResource('zfextended_reso...')
#3 /webs/shared-translate5-instance-files/zend/Zend/Application/Bootstrap/BootstrapAbstract.php(598): Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap('zfextended_reso...')
#4 /webs/shared-translate5-instance-files/zend/Zend/Application.php(373): Zend_Application_Bootstrap_BootstrapAbstract->bootstrap(NULL)
#5 /webs/demo.translate5.net/library/ZfExtended/BaseIndex.php(149): Zend_Application->bootstrap()
#6 /webs/demo.translate5.net/public/index.php(35): ZfExtended_BaseIndex->startApplication()
#7

thrown