Why is maintenance logging a Maintenance tasks not run: could not acquire lock message?
Maintenance locks tables to prevent multiple maintenance procedures from running at the same time. The ‘Maintenance tasks not run: could not acquire lock’ message means that a table is locked and maintenance will not run. It could be that maintenance really is running and a 2nd maintenance procedure was ordered which did not run because the tables were locked. In this case you should let maintenance complete and wait before calling for a further maintenance procedure to run. Two instances being called could mean that you have both auto-maintenance and a cron job for maintenance enabled. Only one will run per Operation Interval (default of 1 hour). There is high probability that you might be getting this message if you are using Auto-maintenance and it gets called many times within an Operation Interval. If you keep an eye on the openx/var/maintenance.log and never see any messages except for this locked warning, then it could be that maintenance is never able to run because the tables
