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https://issues.apache.org/jira/browse/NIFI-2551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15418984#comment-15418984
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Mark Payne commented on NIFI-2551:
----------------------------------
[~mosermw] - I hear ya - this part of the code base is far from trivial! On the
up side, the patch that I am putting together does make it a little easier to
understand, I believe (in addition to making it more correct :)). The only
thing left I think is to figure out how exactly to handle the case where
ProcessSession is calling remove(). That is no longer necessary or correct. We
could simply replace it with an 'archive or remove, depending on whether or not
archive is enabled' type of feature. But I think we can be smarter about how to
handle it.
> Rare condition causes FileSystemRepository NPE
> ----------------------------------------------
>
> Key: NIFI-2551
> URL: https://issues.apache.org/jira/browse/NIFI-2551
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.0.0, 0.7.0
> Reporter: Michael Moser
> Assignee: Michael Moser
> Priority: Blocker
>
> In rare unpredictable cases when NiFi is processing a heavy load, we see
> FileSystemRepository throw a NullPointerException
> {noformat}
> java.lang.NullPointerException
> at o.a.n.c.r.FileSystemRepository$2.write(FileSystemRepository.java:918)
> [nifi-framework-core-0.7.0.jar]
> at
> o.a.n.c.r.io.DisableOnCloseOutputStream.write(DisableOnCloseOutputStream.java:49)
> ....
> Suppressed: java.lang.NullPointerException
> at
> o.a.n.c.r.FileSystemRepository$2.flush(FileSystemRepository.java:934)
> [nifi-framework-core-0.7.0.jar]
> at
> o.a.n.c.r.io.DisableOnCloseOutputStream.close(DisableOnCloseOutputStream.java:68)
> {noformat}
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