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https://issues.apache.org/jira/browse/NIFI-3897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16069971#comment-16069971
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ASF subversion and git services commented on NIFI-3897:
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Commit 7f4cfd51ea07ead6c9b71b6c6d6f87a352b801d3 in nifi's branch
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=7f4cfd5 ]
NIFI-3897: If swapping data into queue and an unexpected exception/error is
thrown, do not lose track of the swap file
Signed-off-by: Pierre Villard <pierre.villard...@gmail.com>
This closes #1960.
> Queue with flow files thinks it is empty
> ----------------------------------------
>
> Key: NIFI-3897
> URL: https://issues.apache.org/jira/browse/NIFI-3897
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.2.0
> Reporter: Joseph Gresock
> Assignee: Mark Payne
> Fix For: 1.4.0
>
> Attachments: queue-has-no-flowfiles.png
>
>
> A particular queue is listed as having 80,000 flow files, but NiFi thinks
> there are none to list. I was originally inclined to believe that the queue
> is indeed empty, and that there is somehow a pointer to 80,000 flow files
> leftover on the queue.
> Unfortunately, the logs have rolled over so I can't see what error or warning
> messages may have happened at the time, and I can't reproduce it reliably.
> Update: I happened to reboot my cluster, and suddenly the 80,000 flow files
> went through the flow. This makes the problem considerably worse, since it
> appears the flow files were "invisible" until the reboot.
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