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https://issues.apache.org/jira/browse/NIFI-730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14960621#comment-14960621
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ASF subversion and git services commented on NIFI-730:
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Commit b8dbd1018cf0b2d09bf7371849cf8b588d5f3f7c in nifi's branch 
refs/heads/NIFI-730 from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=b8dbd10 ]

NIFI-730: Updated details of Provenance Event for when a queue is emptied


> Purge Queue from UI
> -------------------
>
>                 Key: NIFI-730
>                 URL: https://issues.apache.org/jira/browse/NIFI-730
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework, Core UI
>            Reporter: Brian Ghigiarelli
>            Priority: Minor
>
> Making changes to connections between NiFi processors is difficult when data 
> is queued up between those processors. A workaround to this data build up is 
> to stop both processors, reduce/set the FlowFile Expiration of the connection 
> to a low number (e.g., 2 sec), then start the receiving processor to age off 
> the data.
> A more user-friendly solution is to provide a "Purge" or "Delete" context 
> menu option on the queues to remove the data and/or age it off immediately.



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