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https://issues.apache.org/jira/browse/NIFI-6923?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joe Witt resolved NIFI-6923.
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Fix Version/s: 1.11.0
Resolution: Fixed
+1 merged to master
> If FlowFile content is truncated in the Content Repository, NiFi does not
> throw Exception when reading the content
> ------------------------------------------------------------------------------------------------------------------
>
> Key: NIFI-6923
> URL: https://issues.apache.org/jira/browse/NIFI-6923
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Dayakar Morem
> Priority: Major
> Fix For: 1.11.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> If the content of a FlowFile is truncated in the Content Repository, whenever
> NiFi attempts to read the content, it should throw a ContentNotFoundException
> because only part of the content was available. This is handled by the
> `FlowFileAccessInputStream` in the `ensureAllContentRead` method.
> However, in some cases this doesn't happen. To replicate, create the
> following flow:
> GenerateFlowFile -> MergeContent.
> In GenerateFlowFile, choose to use a batch size of 1000 FlowFiles, each 1 KB
> in size. Run the Processor once. Then, use vi to truncate a few bytes from
> the end of the file in the content repository. Then, run MergeContent. The
> processor *should* throw an Exception but doesn't.
> I think the problem is that the `FlowFileAccessInputStream.read(byte[])`
> calls `super.read(byte[])`. This, in turn, calls
> `FlowFileAccessInputStream.read(byte[], int, int)`, which increments
> `bytesConsumed`. This method then returns, as does the super call. Then, the
> `FlowFileAccessInputStream.read(byte[])` call increments `bytesConsumed`
> again.
> Instead, the InputStream should just delegate to `read(byte[], int, int)`
> directly when `read(byte[])` is called instead of delegating to
> `super.read(byte[], int, int)`.
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