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https://issues.apache.org/jira/browse/NIFI-2376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390832#comment-15390832
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Joseph Witt commented on NIFI-2376:
-----------------------------------
reviewing
> Content could be prematurely archived/removed if a call to append() throws an
> Exception
> ---------------------------------------------------------------------------------------
>
> Key: NIFI-2376
> URL: https://issues.apache.org/jira/browse/NIFI-2376
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Blocker
> Fix For: 1.0.0, 0.8.0
>
>
> If ProcessSession.append() is called multiple times for a FlowFile and in one
> of the calls other than the first call, an Exception is thrown, the claimant
> count is decremented more than once. This can result in the content being
> deleted or archived too soon. Consequently, this could also result in a
> NullPointerException being thrown when attempting to write to the FlowFile.
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