Validation throttling appears to leave some tasks hanging

[ledsoft]

The following logs appears to show multiple validation tasks to be submitted to the validation scheduler:

dss-test_termit-server_1  | 02-10-2024 14:05:31.793 [] [TermItScheduler-5] TRACE c.c.k.t.u.t.ThrottleAspect - Throttling task with key 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'
dss-test_termit-server_1  | 02-10-2024 14:05:31.794 [] [TermItScheduler-1] TRACE c.c.k.t.u.t.ThrottleAspect - Running throttled task [0 left] [1 running] 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'
dss-test_termit-server_1  | 02-10-2024 14:05:31.794 [] [TermItScheduler-5] TRACE c.c.k.t.u.l.LongRunningTasksRegistry - Long running task changed state: vocabularyValidation{PENDING, 10bb4592-6c88-496f-b0a3-139fe9258361}
dss-test_termit-server_1  | 02-10-2024 14:05:31.794 [] [TermItScheduler-1] TRACE c.c.k.t.u.l.LongRunningTasksRegistry - Long running task changed state: vocabularyValidation{RUNNING, startedAt=2024-10-02T14:05:31Z, 10bb4592-6c88-496f-b0a3-139fe9258361}
dss-test_termit-server_1  | 02-10-2024 14:05:31.795 [] [TermItScheduler-1] DEBUG c.c.k.t.p.validation.Validator - Validating [https://agentura-cas.cz/DSS/dss---datove-sablony, https://agentura-cas.cz/DSS/dss---skupiny-vlastnosti, https://agentura-cas.cz/DSS/dss---souvisejici-skupiny-vlastnosti, https://agentura-cas.cz/DSS/dss---vlastnosti]
dss-test_termit-server_1  | 02-10-2024 14:05:31.795 [] [TermItScheduler-1] TRACE c.c.k.t.p.validation.Validator - Constructing model from RDF4J repository...
dss-test_termit-server_1  | 02-10-2024 14:05:32.934 [] [TermItScheduler-1] TRACE c.c.k.t.p.validation.Validator - Model constructed, running validation...
dss-test_termit-server_1  | 02-10-2024 14:06:37.015 [] [TermItScheduler-3] TRACE c.c.k.t.u.t.ThrottleAspect - Throttling task with key 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'
dss-test_termit-server_1  | 02-10-2024 14:06:37.017 [] [TermItScheduler-3] TRACE c.c.k.t.u.l.LongRunningTasksRegistry - Long running task changed state: vocabularyValidation{PENDING, 51650369-a063-4717-94d1-c6976cdb9785}
dss-test_termit-server_1  | 02-10-2024 14:07:43.017 [] [TermItScheduler-6] TRACE c.c.k.t.u.t.ThrottleAspect - Throttling task with key 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'
dss-test_termit-server_1  | 02-10-2024 14:08:48.091 [] [TermItScheduler-6] TRACE c.c.k.t.u.t.ThrottleAspect - Throttling task with key 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'
dss-test_termit-server_1  | 02-10-2024 14:09:33.920 [] [TermItScheduler-1] DEBUG c.c.k.t.p.validation.Validator - Done.
dss-test_termit-server_1  | 02-10-2024 14:09:34.038 [] [TermItScheduler-1] TRACE c.c.k.t.u.l.LongRunningTasksRegistry - Long running task changed state: vocabularyValidation{DONE, startedAt=2024-10-02T14:05:31Z, 10bb4592-6c88-496f-b0a3-139fe9258361}
dss-test_termit-server_1  | 02-10-2024 14:09:34.038 [] [TermItScheduler-1] TRACE c.c.k.t.u.t.ThrottleAspect - Finished throttled task [1 left] [0 running] 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'
dss-test_termit-server_1  | 02-10-2024 14:09:44.038 [] [TermItScheduler-6] TRACE c.c.k.t.u.t.ThrottleAspect - Running throttled task [0 left] [1 running] 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'
dss-test_termit-server_1  | 02-10-2024 14:09:44.038 [] [TermItScheduler-6] TRACE c.c.k.t.u.l.LongRunningTasksRegistry - Long running task changed state: vocabularyValidation{RUNNING, startedAt=2024-10-02T14:09:44Z, 51650369-a063-4717-94d1-c6976cdb9785}
dss-test_termit-server_1  | 02-10-2024 14:09:44.295 [] [TermItScheduler-6] TRACE c.c.k.t.u.l.LongRunningTasksRegistry - Long running task changed state: vocabularyValidation{DONE, startedAt=2024-10-02T14:09:44Z, 51650369-a063-4717-94d1-c6976cdb9785}
dss-test_termit-server_1  | 02-10-2024 14:09:44.296 [] [TermItScheduler-6] TRACE c.c.k.t.u.t.ThrottleAspect - Finished throttled task [0 left] [0 running] 'ThrottleAspect.Identifier{group='',identifier='ResultCachingValidator.validate(..)-https://agentura-cas.cz/DSS/dss---datove-sablony'}'

But there are no tasks actually running. However, the UI indicates that there are tasks scheduled for execution (and none is being executed):