When a sender and Distributed Queues have a certified agreement existing between them ,if the active scheduler fails and the worker member which take the place of scheduler if the completion time parameter is said to 20 , when will the reallocation of task will be done

In certified messaging, when a scheduler fails, the replacement scheduler waits for the completion time interval (20 seconds) before reassigning incomplete tasks. This delay ensures the original scheduler had sufficient time to complete the task before declaring it failed. Immediate reassignment would cause duplicate processing, while 'never happens' is incorrect because certified messaging guarantees delivery.