Min Zhou created TAJO-603:
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             Summary: Move container allocation from SubQuery down to 
QueryUnitAttempt
                 Key: TAJO-603
                 URL: https://issues.apache.org/jira/browse/TAJO-603
             Project: Tajo
          Issue Type: Sub-task
            Reporter: Min Zhou


Tajo currently allocates all of the containers in SubQuery. That make things 
complicated.  Both SubQuery and DefaultTaskScheduler should hold a copy of 
allocated containers and running tasks.  And the event flow is difficult to 
understand. 



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