1

Environment:

  • Magento 2.2.2
  • Memcached:1.4.35

Overnight I find myself unable to access the admin area of my Magento installation. No changes were made to the environment. No changes to env.php.

Output when accessing admin area:

Exception #0 (Exception): Warning: SessionHandler::read(): 
Unable to clear session lock record in 
      /var/www/magento/vendor/magento/framework/Session/SaveHandler/Native.php on line 22

Nothing in logs (nginx or magento)

1

Check https://github.com/magento/magento2/issues/5319. This may resolve your issue.

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