Mustafa Iman created HIVE-23596:

             Summary: Encode guaranteed task information in containerId
                 Key: HIVE-23596
             Project: Hive
          Issue Type: Improvement
            Reporter: Mustafa Iman
            Assignee: Mustafa Iman

We should avoid calling LlapTaskScheduler to get initial isguaranteed flag for 
all the tasks. It causes arbitrary delays in sending tasks out. Since 
communicator is a single thread, any blocking there delays all the tasks.

There are [] and 
[] for a proper solution to this. 
However, that requires a Tez release which seems far right now. We can replace 
the current hack with another hack that does not require locking.

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