Getting all task IDs from nested chains and chords

One hacky way is calling the tasks with apply_async, save the task ids and wait for them manually. In this way you will have complete control of happens but you should only wait for async tasks as last resort. Now you can access task id, return value, etc. For example something like this:

 task1 = a_task.apply_async()
 task2 = b_task.apply_async()
 task3 = c_task.apply_async()

 tasks = [task1, task2, task3]

 for task in tasks:
     task.wait()