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https://issues.apache.org/jira/browse/NIFI-7114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17041998#comment-17041998
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Paul Kelly commented on NIFI-7114:
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Correct, you shouldn't need to do anything, just sit back and watch it grow.
I just updated my flow again, this time with three PutDistributedMapCaches
instead of the one DetectDuplicates. This one is growing faster for me.
I restarted NiFi, took lsof +E -P -p <pid of nifi not bootstrap>, and have it
running. I will grab another lsof +E -P -p <pid of nifi not bootstrap> and
post both in about an hour. So far my FIFOs are up from starting at 17 to over
60 in under 5 minutes.
> NiFi not closing file handles
> -----------------------------
>
> Key: NIFI-7114
> URL: https://issues.apache.org/jira/browse/NIFI-7114
> Project: Apache NiFi
> Issue Type: Bug
> Components: Configuration
> Affects Versions: 1.10.0, 1.11.0
> Environment: Amazon EC2 running either Amazon Linux 2 or Ubuntu 18.04.
> NiFi has been installed with no change to any configuration file.
> Reporter: Vinicius Zolin
> Priority: Major
> Attachments: destination.xml, fifocounts.txt, flow.xml.gz, lsof.log,
> lsof.zip, lsofAfter.log, lsofBefore.log, openFiles.xlsx, reproduction.zip,
> source.xml
>
>
> Since at least version 1.10 NiFi stopped closing file handles. It opens circa
> 500 files per hour (measured using lsof) without any apparent limit until it
> crashes due to too many open files.
>
> Increasing the computer open file limit is not a solution since NiFi will
> still crash, it'll only take longer to do so.
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