DetectDuplicate error "unable to communicate with cache when processing due to connection refused." Retrieving data from mongo collection, setting flowfile attribute "oid" to the mongo generated id given to each entry from the collection, then detecting any duplicate data based on that oid for when GetMongo runs again.
The above question and the reply thread below was originally posted in the Community Help Track. On Tue Jun 18 03:04 UTC 2019, a member of the HCC moderation staff moved it to the Data Ingestion & Streaming track. The Community Help Track is intended for questions about using the HCC site itself.