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https://issues.apache.org/jira/browse/PDFBOX-5731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17796252#comment-17796252
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liu commented on PDFBOX-5731:
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1、Keep the original commonNameMap.
2、When cleaning, you can use the ReferenceQueue to obtain the gc object and
delete the key, such as the java.util.WeakHashMap#expungeStaleEntries method of
weakashmap, which can reduce a lot of invalid traversals.
You can try this to see if you can get support from the maintainers.
I personally think that to really solve this problem, we can only cache the
COSName of the current PDF scene instead of storing other PDFs, although this
change is relatively large.
> org.apache.pdfbox.cos.COSName#nameMap There is a memory leak problem.
> ---------------------------------------------------------------------
>
> Key: PDFBOX-5731
> URL: https://issues.apache.org/jira/browse/PDFBOX-5731
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.30, 3.0.1 PDFBox
> Reporter: liu
> Priority: Major
> Attachments:
> attempted_fix_for_PDFBOX-5731__clear_out_unused_COSName_instances_automatically.patch,
> image-2023-12-08-16-02-12-293.png, image-2023-12-13-17-04-22-073.png,
> screenshot-1.png, screenshot-2.png, screenshot-3.png, screenshot-4.png,
> screenshot-5.png
>
>
> !image-2023-12-08-16-02-12-293.png!
> !screenshot-1.png!
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