@Rashad_K  What does NiFI provenance show for the duplicate inserts? Do you see the same NiFi FlowFile (by FlowFile UUID) being successfully inserted? Does the issue persist if your change the run duration from 25ms to 0ms? Please help our community grow. If you found any of the suggestions/solutions provided helped you with solving your issue or answering your question, please take a moment to login and click "Accept as Solution" on one or more of them that helped. Thank you, Matt ... View more

Thank you @SAMSAL .. appreciated the way of explanation.. generally i'l prefer to add/update the max.initialvalue.column property of QDT  to restart fetching missed data as a one time modification but I would love to see NIFI using fault tolerant mechanism in future so that the developers don't have to find the workaround or have to recover the lost data manually by modifying the QDT ... View more