[
https://issues.apache.org/jira/browse/PDFBOX-6036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18008208#comment-18008208
]
Andreas Lehmkühler commented on PDFBOX-6036:
--------------------------------------------
Is this based on a real use case or a constructed one? I'd like to evaluate the
real severity of this "bootleneck" to see if we had to find a quick and maybe
dirty solution
> StackOverflowError in COSWriterCompressionPool for large number of bookmarks
> ----------------------------------------------------------------------------
>
> Key: PDFBOX-6036
> URL: https://issues.apache.org/jira/browse/PDFBOX-6036
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 3.0.5 PDFBox
> Reporter: Bernhard Fey
> Priority: Critical
>
> Saving a document containing thousands of bookmarks causes a
> {{StackOverflowError}} in {{{}COSWriterCompressionPool{}}}.
>
> The stack trace alternates between the following two methods:
>
>
> {code:java}
> at
> org.apache.pdfbox.pdfwriter.compress.COSWriterCompressionPool.addStructure(COSWriterCompressionPool.java:190)
> at
> org.apache.pdfbox.pdfwriter.compress.COSWriterCompressionPool.addElements(COSWriterCompressionPool.java:204)
> {code}
>
>
> You can replicate the issue with the following class:
>
>
> {code:java}
> public class StackOverflBookm {
> public static void main(String[] args) {
> for (int i = 1; i <= 1_111_111; i *= 2) {
> System.out.println(new
> java.text.DecimalFormat("#,###").format(i));
> try (org.apache.pdfbox.pdmodel.PDDocument document = new
> org.apache.pdfbox.pdmodel.PDDocument()) {
>
> org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDDocumentOutline
> outline =
> new
> org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDDocumentOutline();
>
> document.getDocumentCatalog().setDocumentOutline(outline);
> for (int j = 0; j < i; j++) {
> outline.addLast(new
> org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDOutlineItem());
> }
> document.save(new java.io.ByteArrayOutputStream(),
>
> org.apache.pdfbox.pdfwriter.compress.CompressParameters.DEFAULT_COMPRESSION);
> // NO_COMPRESSION avoids the Error
> } catch (Throwable e) {
> e.printStackTrace(System.out);
> return;
> }
> }
> }
> }{code}
>
>
> Without compression it will create documents with up to over a million
> bookmarks (assuming sufficient heap size, 1 gigabyte is enough).
> But with the default compression the StackOverflowError will be thrown (on my
> Windows VMs, with a default stack size of about 1 megabyte, before reaching
> ten thousand bookmarks).
>
> Apparently the recursion depth of the two methods grows with the amount of
> bookmarks, until the Error is thrown.
>
> I have chosen the priority Critical, because an {{Error}} is thrown and,
> unlike Exceptions, likely not handled in integrations.
> Additionally, most integrations likely use the {{save}} methods without the
> second parameter, getting compression enabled by default.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org
For additional commands, e-mail: dev-h...@pdfbox.apache.org
