markap14 opened a new pull request #3743: NIFI-6677: Update ListHDFS to clear 
state (when appropriate) in an @O…
URL: https://github.com/apache/nifi/pull/3743
 
 
   …nScheduled method, just as AbstractListProcessor does, instead of doing it 
in onTrigger. Doing it in onTrigger is problematic because in a cluster, the 
Primary Node may run for some period of time, perhaps days or months. Then, 
when the Primary Node chagnes, onTrigger gets called for the first time on the 
new Primary Node, and this triggers the processor to clear state.
   
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