The following message started appearing: I have no idea what to do about it, other that try to run an “unlock” function. Does this require running or calling the PHP program, lock.ini? (or some stripped down version of the same?) Does this have to be custom coded (as by a programmer?) Shouldn’t there be a command-line solution to this?

Why would an “expired password” be involved with this?

PDOException: SQLSTATE[HY000] [1862] Your password has expired. To log in you must change it using a client that supports expired passwords. in lock_may_be_available() (line 167 of /usr/local/www/drupal7/includes/lock.inc).

Source: https://www.drupal.org/taxonomy/term/22/feed