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https://issues.apache.org/jira/browse/PDFBOX-2847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14608756#comment-14608756
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Jim deVos commented on PDFBOX-2847:
-----------------------------------
Great to hear, thanks so much for the quick response.
> mergeDocumentsNonSeq does not utilize scratchFile
> -------------------------------------------------
>
> Key: PDFBOX-2847
> URL: https://issues.apache.org/jira/browse/PDFBOX-2847
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 1.8.9
> Reporter: Jim deVos
> Assignee: Tilman Hausherr
> Attachments: pdfbox1.8.x.patch
>
>
> I noticed when merging relatively large pdfs (1gb) that the heap would grow
> by at least the same amount until complete, even when I call
> mergeDocumentsNonSeq() and supplying a read/write scratchfile.
> When I looked at the source for mergeDocuments(bool, RandomAccess), it looks
> like the scratch file is never used.
> {code}
> private void mergeDocuments(boolean isNonSeq, RandomAccess scratchFile)
> throws IOException, COSVisitorException
> {
> //...snip
> if (isNonSeq)
> {
> source = PDDocument.loadNonSeq(sourceFile, null);
> }
> //...snip
> }
> {code}
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