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https://issues.apache.org/jira/browse/NIFI-1877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15373169#comment-15373169
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Joseph Witt commented on NIFI-1877:
-----------------------------------
looks like it has been merged and closed. Can we close the ticket?
> FirstInFirstOut prioritizer does not work.
> ------------------------------------------
>
> Key: NIFI-1877
> URL: https://issues.apache.org/jira/browse/NIFI-1877
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 0.6.1
> Reporter: Matthew Clarke
> Assignee: Mark Payne
> Fix For: 1.0.0
>
>
> The FirstInFirstOut (FIFO) prioritizer has no guarantee of actually working
> on queued FlowFile in a FIFO order. The reliance on lastQueuedDate or time
> is not sufficient to guarantee order as FlowFile processed as batched will
> all have the same exact timestamp. There is also inconsistency in how
> processors update lastQueuedDate. If a processor passes a FlowFile through
> without any change, Date is not updated. This in turn affects the processing
> order of FlowFiles. We are finding that more and more NiFI users have
> specific file processing order needs.
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