TYPO3 scheduler floods sys_log with "Task is already running and multiple executions are not allowed, skipping!"
I am not sure if this is the exact same problem as https://forge.typo3.org/issues/25615 (which has been closed), but it looks like it.
How problem manifests itself¶
- Multiple scheduler PHP processes running
- sys_log is flooded with massive amount of messages, all about the same time
[scheduler]: scheduler - Task is already running and multiple executions are not allowed, skipping! Class: TYPO3\CMS\Scheduler\Task\CachingFrameworkGarbageCollectionTask, UID: 8
- Scheduled tasks in BE shows: "Caching framework garbage collection (scheduler)" as still running
Reason for problem¶
Probably a chain of several errors. In any case, it would be greate if sys_log would not get flooded (and allocate more than 50GB thus causing problems on weekend and affect stability of other TYPO3 systems on same DB server)
TYPO3 version: 8.7.30.
(I realize this is not the latest, will update to 8.7.31 shortly, but it looks like no change was made in this area.)