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From James McMahon <>
Subject Re: Cannot Restart Nifi
Date Tue, 28 Mar 2017 10:12:48 GMT
I noticed, too, that I have many partitions, partition-0 to partition-255
to be exact. These all have journal files in them. So I suspect that the
journal file I cited is not specifically the problem in and of itself, but
instead is the point where the allowable open files threshold is reached.
I'm wondering if I have to recover by deleting all these partitions? -Jim

On Tue, Mar 28, 2017 at 5:58 AM, James McMahon <> wrote:

> While trying to use Python logging from two scripts I call via two
> independent ExecuteScript processors, I seem to have inadvertently created
> a condition where I have too many files open. This is causing a serious
> challenge for me, because when I attempt to start nifi (v0.7.1) it fails.
> The log indicates that the flow controller cannot be started, and it cites
> the cause as this:
> org.apache.nifi.web.NiFiCoreException: Unable to start Flow Controller
> .
> . (many stack trace entries)
> .
> Caused by: java.nio.file.FileSystemException: /mnt/flow_repo/flowfile_
> repository/partition-86/83856.journal: Too many files open
> In a situation like this, what is the best practice for recovery? Is it
> permissible to simply delete this journal file? What are the negative
> repercussions of doing that?
> I did already try deleting my provenance_repository, but that did not
> allow nifi to restart. (NiFi did re-establish my provenance_repository at
> restart).
> Thanks very much in advance for your help. -Jim

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