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From "Joe Witt (Jira)" <>
Subject [jira] [Commented] (NIFI-7114) NiFi not closing file handles
Date Fri, 21 Feb 2020 17:56:00 GMT


Joe Witt commented on NIFI-7114:

as an update for those following along
I've got nifi 1.8 and lastest master running identical flows side by side.

indeed i cannot see any leak on 1.8.  But I do on master.

What is most funny is Burgess and I think the problem is related to not properly closing DataInput/OutputStreams
in mapcache client/server.  And he fixed that and tried against master and that works now

But this bug has been here....for a long time.  So there must be some underlying change that
exposed this handling or something.  More digging to do but good progress in any case.

> NiFi not closing file handles
> -----------------------------
>                 Key: NIFI-7114
>                 URL:
>             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,,
lsofAfter.log, lsofBefore.log, openFiles.xlsx,, 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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