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https://issues.apache.org/jira/browse/NIFI-6065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Payne updated NIFI-6065:
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Status: Patch Available (was: Open)
> Root Group Ports "waiting" too long
> -----------------------------------
>
> Key: NIFI-6065
> URL: https://issues.apache.org/jira/browse/NIFI-6065
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Affects Versions: 1.9.0
> Reporter: Brandon DeVries
> Assignee: Mark Payne
> Priority: Major
>
> In NIFI-408, a change was made to StandardRootGroupPort to poll for 100
> millis instead of doing a non-blocking poll, and yielding if there were no
> results. While I don't know the initial motivation for this change
> (thoughts, [~markap14]?), the current implementation is resulting in an
> excessive number of Timer-Driven threads stuck in the TIMED_WAITING state.
> Essentially, if you have a high number of low traffic remote ports, you lose
> a substantial chunk of your timer driven thread pool to simply "waiting".
> My first thought would be to revert the change, possibly even without the
> context.yield. Second would be to drastically reduce the poll timeout... 10
> or 5 millis, although any choice is somewhat arbitrary and flow-dependent.
> EDIT: which probably makes it a candidate for a nifi.property
> Any other thoughts or suggestions would be appreciated.
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