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https://issues.apache.org/jira/browse/PDFBOX-3811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16027465#comment-16027465
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Tilman Hausherr commented on PDFBOX-3811:
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[~duyleekun] please try with a snapshot
https://repository.apache.org/content/groups/snapshots/org/apache/pdfbox/pdfbox-app/2.0.7-SNAPSHOT/
the difference is now that an exception will be thrown telling you what to do,
which is to call {{setByteRange(PDDocument.RESERVE_BYTE_RANGE)}} before your
next call.
Please give some feedback whether you can work that way.
> Problem with calling "saveIncrementalForExternalSigning" more than once in
> the same document
> --------------------------------------------------------------------------------------------
>
> Key: PDFBOX-3811
> URL: https://issues.apache.org/jira/browse/PDFBOX-3811
> Project: PDFBox
> Issue Type: Bug
> Components: Signing
> Affects Versions: 2.0.6
> Environment: Java 1.8
> Reporter: Le Duc Duy
> Priority: Trivial
> Labels: easyfix, signature, signing
> Attachments: PDFBoxTest.java, Screen Shot 2017-05-26 at 6.39.10 PM.png
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> I've included the test which will fail.
> After digging around a little, I found out that by calling
> saveIncrementalForExternalSigning, it trimmed the reserved space in the
> ByteRange (I've included the difference in the screen shot).
> I'm not sure if this is a bug for anyone but it's for my use case
> (distributed digital signing). Changing the content at all is not permitted
> at all.
> If this is an intended feature, please dismiss this. I can workaround by
> calling it more than once and it'll be stable although I'm not sure about
> efficiency.
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