Zakelly commented on PR #24690:
URL: https://github.com/apache/flink/pull/24690#issuecomment-2071298219

   > Hi @Zakelly, the code si LGTM, I have one question, why didn't leverage 
the capability of Reactor for these kind of async callback? It seems very 
similar to me, anything I missed? just curious.
   
   Do you mean the Project Reactor?
   The main reason is that we want to carefully customize and control the 
processing of async requests, to make sure it correctly interacts with Flink's 
components (back-pressure, mailbox, watermark and checkpoint). So what we 
really need is the basic functionality of futures, and we built up the whole 
async processing on top of this.


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