maryannxue commented on issue #25308: [SPARK-28576][SQL] fix the dead lock 
issue when enable new adaptive execution
URL: https://github.com/apache/spark/pull/25308#issuecomment-517320317
 
 
   @JkSelf I tried it and it looks fine
   <img width="509" alt="Screen Shot 2019-08-01 at 9 42 56 AM" 
src="https://user-images.githubusercontent.com/4171904/62302984-f0a89f00-b440-11e9-92a5-174713b52d38.png";>
   
   We still need a little fix for updating the "final plan" though. If the 
"remainder" plan (the top-level part of the plan not in any stages) has 
subqueries, those subqueries will not be updated to their latest state, so we 
need to move `onUpdatePlan` after the final plan execution. However I don't 
think this is the case in Q6.

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