Github user ijokarumawak commented on the issue:

    https://github.com/apache/nifi/pull/2055
  
    Hi @pvillard31 , thanks for tackling this! Although the proposed change can 
keep a signal when there are counts remaining, I found that:
    
    - Current implementation of Wait and WaitNotifyProtocal are already 
complex, and adding another execution branch would make it more complex, and 
hard to maintain
    - Calling WaitNotifyProtocol.notify method from Wait is not expected by 
design.
    
    So, I'd like to propose different approach, that refactors and consolidates 
current implementation so that Wait processor has less different execution 
paths in its code. That would be more understandable for developers and users. 
Would you take a look at this commit? This branch has 1 more commit based on 
this PR:
    
https://github.com/ijokarumawak/nifi/commit/9bc38bb7ef62a11e0a137b7992eba93b75374453
    If it looks reasonable, please add it to your PR.


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