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https://issues.apache.org/jira/browse/NIFI-4372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16190130#comment-16190130
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Mark Payne commented on NIFI-4372:
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[~pvillard] - we should never have a condition where a FlowFile is not released
when a signal is triggered. If we do, then adding a prioritizer won't change
this. This very much sounds like a bug, and perhaps changing the ordering of
the queue was avoiding the triggering of the bug for you, but I think we've got
a deeper issue here.
> Wait processor - recommend prioritizer in documentation
> -------------------------------------------------------
>
> Key: NIFI-4372
> URL: https://issues.apache.org/jira/browse/NIFI-4372
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Documentation & Website, Extensions
> Reporter: Pierre Villard
> Assignee: Pierre Villard
> Priority: Trivial
> Labels: documentation
>
> When using the Wait processor, the use of a connection prioritizer (FIFO for
> instance) on the wait relationship should be recommended in the processor
> documentation. When having tens of thousands of flow files in the wait
> relationship, not using a prioritizer could lead to flow files not being
> released when signal is notified and generate expired flow files.
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