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https://issues.apache.org/jira/browse/NIFI-1910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15300105#comment-15300105
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Andrew Grande commented on NIFI-1910:
-------------------------------------

I think this can be closed as Won'tFix. We had a chance to discuss, the reason 
was the Unmatched relationship loop - it is not penalized in case of a 
RouteOnContent, as it can be a valid path. The downside was it kept hammering 
the processor. Moving it to a different flow branch or auto-terminating 
resolves the issue.

> RouteOnContent causes high CPU usage with no data
> -------------------------------------------------
>
>                 Key: NIFI-1910
>                 URL: https://issues.apache.org/jira/browse/NIFI-1910
>             Project: Apache NiFi
>          Issue Type: Bug
>    Affects Versions: 0.6.1
>         Environment: RPI3
>            Reporter: Andrew Grande
>         Attachments: screenshot.png
>
>
> I have a RouteOnContent step in my flow which performs a simple regex match 
> with 2 outcomes (pass and unmatched).
> However, I noticed that it is spinning with a lot of empty task cycles when 
> there is no data incoming at all. Moreover it causes 120% cpu usage spikes. 
> Confirmed multiple times via top by simply stopping and starting 
> RouteOnContent.



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