jihoonson commented on issue #8718: Fix graceful shutdown for tasks
URL:
https://github.com/apache/incubator-druid/issues/8718#issuecomment-548112999
I think tasks can be categorized into two groups, i.e., restorable tasks and
non-restorable tasks. Restorable tasks should store their last status on disk
when graceful shutdown is called, but can stop without it if force shutdown is
called. Non-restorable tasks just clean up their resources on both graceful
shutdown and force shutdown.
Realtime tasks are restorable while batch tasks are not currently. You can
tell a given task is restorable or not by calling `Task.canRestore()`.
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