Hardware and performance

Hello Moodlers ,

I know this was asked before, but since there was no answer I though I will give it another try

Other Posts about this:

https://moodle.org/mod/forum/discuss.php?d=358434

https://moodle.org/mod/forum/discuss.php?d=344181

Based on the latest Moodle Docs, we can now run the cron on multiple webservers (link).

Today I tried to do just that, while the cron was running on node1 I tried to run the cron on node 2.

Node 1 finished the cron ok, node 2 gave an error (below) and stopped processing the cron and exited

The error

Scheduled task complete: Forum mailings and maintenance jobs (mod_forum\task\cron_task)

Execute adhoc task: core\task\refresh_mod_calendar_events_task

... started 14:11:23. Current memory use 27.3MB.

Refreshing events for assign

Default exception handler: Coding error detected, it must be fixed by a programmer: A lock was created but not released at:

[dirroot]/lib/classes/task/manager.php on line 448

 Code should look like:

 $factory = \core\lock\lock_config::get_lock_factory('type');

 $lock = $factory->get_lock(Resource id #854);

 $lock->release();  // Locks must ALWAYS be released like this.

 Debug:

Error code: codingerror

* line 117 of /lib/classes/lock/lock.php: coding_exception thrown

* line 91 of /lib/cronlib.php: call to core\lock\lock->__destruct()

* line 61 of /admin/cli/cron.php: call to cron_run()

!!! Coding error detected, it must be fixed by a programmer: A lock was created but not released at:

[dirroot]/lib/classes/task/manager.php on line 448

 Code should look like:

 $factory = \core\lock\lock_config::get_lock_factory('type');

 $lock = $factory->get_lock(Resource id #854);

 $lock->release();  // Locks must ALWAYS be released like this.

!!!

So is it possible to run the cron on different webservers for the same Moodle instance or not?

Since cron found that there was a lock already in place for that task, why the cron didnt continue with the next task and it exited?

Kind regards

Christos