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https://issues.apache.org/jira/browse/NIFI-3522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15879357#comment-15879357
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ASF GitHub Bot commented on NIFI-3522:
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Github user olegz commented on the issue:
https://github.com/apache/nifi/pull/1532
+1 merging
> If a Processor clones a FlowFile then adds attributes to or modifies the
> clone, a Provenance Event is generated with no FlowFile UUID.
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: NIFI-3522
> URL: https://issues.apache.org/jira/browse/NIFI-3522
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Fix For: 1.2.0
>
>
> This can be recreated by adding a SplitText Processor to the canvas and then
> feeding it in a FlowFile that does not need to be split. In this case, a
> Provenance CLONE event is generated, and so is an ATTRIBUTES_MODIFIED event
> because after cloning the incoming FlowFile, we add attributes to the clone.
> If we then attempt to query provenance for events generated by this Processor
> - or use the Provenance Reporting Task - we will get an error indicating that
> the Provenance Event could not be generated because it has no FlowFile UUID.
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