With the increasingly complexity of concurrent applications, many developers find that Java’s low-level threading capabilities are insufficient to their programming needs. In that case, it might be ...

The need for a way to execute concurrent tasks within Java has been addressed within JSE by the java.util.concurrent.Executor and in a limited fashion in JEE by the WorkManager specification.

java.util.concurrent.CompletionException: java.lang.ArrayIndexOutOfBoundsException: Index -4 out of bounds for length 16 at java.base/java.util.concurrent ...

A task instance is queued and the celery executor submitted an executor event with state=TaskInstanceState.QUEUED. However, the scheduler did not fetch the event's corresponding task instance because ...