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https://issues.apache.org/jira/browse/NIFI-7002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Handermann resolved NIFI-7002.
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Fix Version/s: 1.13.0
Resolution: Fixed
> Handle large files internally in EC toolkit
> -------------------------------------------
>
> Key: NIFI-7002
> URL: https://issues.apache.org/jira/browse/NIFI-7002
> Project: Apache NiFi
> Issue Type: Sub-task
> Components: Tools and Build
> Affects Versions: 1.10.0
> Reporter: Andy LoPresto
> Priority: Major
> Labels: encryption, heap, security, streaming, toolkit
> Fix For: 1.13.0
>
>
> The EC toolkit cannot handle large flow definition files (>100 MB
> uncompressed) due to its use of {{String}} to hold the XML content internally
> through frequent manipulations. As Strings are immutable in Java, this causes
> a lot of heap usage and duplication. The read/write to the file system also
> operates on the String directly rather than perform a streaming read/write.
> We should change the internal representation of the file content (for all
> files) to be a {{BufferedInputStream}} or other similar stream representation
> rather than a String. We should test with very large files (1 GB) and clearly
> provide instructions and warnings if the file size exceeds that.
> The logic of value encryption/replacement will have to change to handle this
> approach.
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