When a task is cancelled by the Android system (interrupted) or perhaps if it fails with an exception on the Android side, the task could get into a state where it would have to wait for the next reconciliation to be properly handled within Kolibri. This may cause significant delays and the user may not realize why.
Errors and logs
2024-01-29 20:55:48.388 9506-9597 Kolibri.Fo...oundWorker org.learningequality.Kolibri D Stopping foreground remote task aa73f1bc-8393-4675-8070-d51e234cfdf6
2024-01-29 20:55:48.388 9506-9506 WM-Processor org.learningequality.Kolibri D Processor aa73f1bc-8393-4675-8070-d51e234cfdf6 executed; reschedule = true
2024-01-29 20:55:48.388 9506-9506 WM-SystemJobService org.learningequality.Kolibri D aa73f1bc-8393-4675-8070-d51e234cfdf6 executed on JobScheduler
2024-01-29 20:55:48.390 9506-9597 WM-Processor org.learningequality.Kolibri D WorkerWrapper interrupted for aa73f1bc-8393-4675-8070-d51e234cfdf6
2024-01-29 20:55:48.391 9506-9597 WM-StopWorkRunnable org.learningequality.Kolibri D StopWorkRunnable for aa73f1bc-8393-4675-8070-d51e234cfdf6; Processor.stopWork = true
2024-01-29 20:55:48.393 9506-9597 WM-WorkerWrapper org.learningequality.Kolibri I Work [ id=aa73f1bc-8393-4675-8070-d51e234cfdf6, tags={ kolibri_job_type:kolibri.core.auth.tasks.soud_sync_processing, kolibri_job_long_running, kolibri_task_id:50, org.learningequality.Kolibri.ForegroundWorker } ] was cancelled
java.util.concurrent.CancellationException: Task was cancelled.
at androidx.work.impl.utils.futures.AbstractFuture.cancellationExceptionWithCause(AbstractFuture.java:1183)
at androidx.work.impl.utils.futures.AbstractFuture.getDoneValue(AbstractFuture.java:513)
at androidx.work.impl.utils.futures.AbstractFuture.get(AbstractFuture.java:474)
at androidx.work.impl.WorkerWrapper$2.run(WorkerWrapper.java:316)
at androidx.work.impl.utils.SerialExecutorImpl$Task.run(SerialExecutorImpl.java:96)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:784)
2024-01-29 20:55:48.393 9506-9597 WM-WorkerWrapper org.learningequality.Kolibri D Work interrupted for Work [ id=aa73f1bc-8393-4675-8070-d51e234cfdf6, tags={ kolibri_job_type:kolibri.core.auth.tasks.soud_sync_processing, kolibri_job_long_running, kolibri_task_id:50, org.learningequality.Kolibri.ForegroundWorker } ]
Expected behavior
Since we already have code that implements reconciliation by writing directly to the job_storage.sqlite3 database, we can reuse that to make additional defensive handling that more swiftly reconciles tasks with Kolibri under specific circumstances:
1) When the worker's onStopped method is called: we're allowed to do synchronous operations in this method (ref, ref)
2) When the result from processing the task encounters an exception: this generally doesn't happen if the task fails within python, so this catches the Android side of it (ref)
User-facing consequences
Longer delays during task processing when edge cases occur
Observed behavior
When a task is cancelled by the Android system (interrupted) or perhaps if it fails with an exception on the Android side, the task could get into a state where it would have to wait for the next reconciliation to be properly handled within Kolibri. This may cause significant delays and the user may not realize why.
Errors and logs
Expected behavior
Since we already have code that implements reconciliation by writing directly to the
job_storage.sqlite3database, we can reuse that to make additional defensive handling that more swiftly reconciles tasks with Kolibri under specific circumstances:1) When the worker's
onStoppedmethod is called: we're allowed to do synchronous operations in this method (ref, ref) 2) When the result from processing the task encounters an exception: this generally doesn't happen if the task fails within python, so this catches the Android side of it (ref)User-facing consequences
Longer delays during task processing when edge cases occur
Context
Kolibri 0.16.0 on Android