I try to install Mage 2 to my Ubuntu, Apache2, PHP7, MySql. First time a had error binded with not installed memcached. I have installed it. Then i have:

1 exception(s): Exception #0 (Exception): Warning: SessionHandler::read(): Write of lock failed in /var/www/magento2.ubu/vendor/magento/framework/Session/SaveHandler/Native.php on line 22

May be someone has solution to this? Thanks