ErrorException 例外が発生しました

/var/www/html/quartett/core/Session.php [38行目]

[WARNING:警告] session_start(): open(/var/lib/php/session/sess_eo6eppkvjtpn4kvdbe00qj07dd, O_RDWR) failed: No space left on device (28)

#0 [internal function]: Qrt\Core\Quartett->errorhandling(2, 'session_start()...', '/var/www/html/q...', 38)
#1 /var/www/html/quartett/core/Session.php(38): session_start()
#2 /var/www/html/quartett/core/Session.php(164): Qrt\Core\Session->__construct(NULL)
#3 /var/www/html/quartett/core/SorterPager.php(733): Qrt\Core\Session::instance()
#4 /var/www/html/quartett/core/SorterPager.php(424): Qrt\Core\SorterPager->saveStatusToSession()
#5 /var/www/html/myapp/model/event.php(166): Qrt\Core\SorterPager->afterFetch(Object(Qrt\Model\event))
#6 /var/www/html/myapp/model/event.php(357): Qrt\Model\event->find()
#7 /var/www/html/myapp/cms_plugin/EventList.php(90): Qrt\Model\event->findForList('jp', Array, '1', 30)
#8 /var/www/html/myapp/core/CMSManager.php(847): Qrt\Plugin\EventList->loadPlugin()
#9 /var/www/html/myapp/core/CMSManager.php(695): Qrt\Core\CMSManager->loadPlugin('...', Array)
#10 /var/www/html/myapp/core/CMSManager.php(239): Qrt\Core\CMSManager->embedPlugins('...', true)
#11 /var/www/html/myapp/action/PublicContents.php(62): Qrt\Core\CMSManager->getSource(Array)
#12 [internal function]: Qrt\Action\PublicContents->index()
#13 /var/www/html/quartett/core/Quartett.php(108): call_user_func_array(Array, Array)
#14 /var/www/html/index.php(20): Qrt\Core\Quartett->__construct()
#15 {main}