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https://issues.apache.org/jira/browse/NIFI-1577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15173034#comment-15173034
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Joseph Witt commented on NIFI-1577:
-----------------------------------
full clean build w/contrib check passes.
Ran on-line tests using similar model to what you outlined with some tweaks.
Observed completely stable open file count.
+1
> NiFi holds open too many files when using a Run Duration > 0 ms and calling
> session.append
> ------------------------------------------------------------------------------------------
>
> Key: NIFI-1577
> URL: https://issues.apache.org/jira/browse/NIFI-1577
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Fix For: 0.6.0
>
> Attachments:
> 0001-NIFI-1577-Close-any-streams-that-are-left-open-for-a.patch
>
>
> If a Processor calls ProcessSession.append() and has a Run Duration scheduled
> > 0 ms, we quickly end up with "Too many open files" exceptions.
> This appears to be due to the fact that calling append() holds the content
> repository's stream open so that the session can keep appending to it, but on
> checkpoint() the session does not close these streams. It should close these
> streams on checkpoint, since the Processor is no longer allowed to reference
> these FlowFiles anyway at that point.
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