austince commented on pull request #15497:
URL: https://github.com/apache/flink/pull/15497#issuecomment-815241115


   So @zentol, I think we have three options:
   
   1. do not support this case in the adaptive scheduler (882e7fd + b412a4b)
   2. support this on a "best-effort" basis, applying the same rules as 
Reactive mode that max parallelism cannot be scaled down (eaf1f34 + f39c534)
   3. support this use case fully by changing max parallelism after the fact 
(eaf1f34 (?) + ...)
   
   Maybe there are options that I'm missing. But from this list, I'd choose 1. 
What do you think? 


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