Hello I am trying to make a data flow through Nifi which are listFile -> fetchFile -> data transformation -> putKudu   However, I want to somehow pause the fetchFile processor or hold on to the flowfiles received from the local server until a previous flowfile completely goes through the downstream, after putKudu processor, then release the next flowfile one by one. I looked at Wait and Notify processors but could not find a way to notify the next flowfile in the queue to be released.   Is it possible to apply this logic in the Nifi without using custom processor?   Any help is appreciated. ... View more