Every so often, one of my sites' cron jobs will throw the error:
Fatal error: Cannot redeclare class QueryConditionInterface in /var/www/html/example/includes/database/query.inc on line 16
This happens seemingly at random -- sometimes once or twice a day, sometimes not at all. (The cron job runs every five minutes.) I have several D7 sites running on the same server, and this is the only one that does it.
Any thoughts about this out there? The site doesn't seem to be impaired by the error, but I'd feel better if if it weren't happening. Thanks!