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to add unique identifier from nifi data/filename to kafka logs

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to add unique identifier from nifi data/filename to kafka logs

New Contributor

i need to add a unique identifier for each message from Nifi to Kafka in the kafka logs using kafka publisher, i saw several method on google like using EvaluateJsonPath to extract the value of field and turn into attribute and then publish using it in mesage key, but it not working. any ideas ?