Muhammad Samir Khan created TEZ-3816:

             Summary: Ability to automatically speculate single-task vertices
                 Key: TEZ-3816
             Project: Apache Tez
          Issue Type: Improvement
            Reporter: Muhammad Samir Khan
            Assignee: Muhammad Samir Khan

When a single-task vertex is unlucky, it lands on a very slow node. Speculation 
doesn't currently apply when there are no other tasks to compare with. It would 
be good to either have a configurable timeout after which the tasks 
automatically speculate.

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