Ryan McKay created PDFBOX-5939:
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Summary: Merge docs with specific characteristics causes stack
overflow
Key: PDFBOX-5939
URL: https://issues.apache.org/jira/browse/PDFBOX-5939
Project: PDFBox
Issue Type: Bug
Affects Versions: 3.0.3 PDFBox, 2.0.33
Environment: Mac local development env
Linux production env
Reporter: Ryan McKay
Attachments: form-elements.pdf, google-docs-1.pdf, google-docs-2.pdf
Merging specific docs in a specific order causes a stack overflow. We've
noticed that a common thread is that one of the docs was exported from Google
Docs. Order matters. If a Google docs PDF is followed by another Google docs
PDF (either itself again or a different one) or a PDF with form elements, the
problem is encountered. Interspersing other docs that don't have those
characteristics doesn't affect the outcome. Form elements followed by Google
docs works fine also.
The specific code that encounters the problem is as follows:
{code:java}
PDFMergerUtility PDFmerger = new PDFMergerUtility();
PDFmerger.setDestinationFileName(outputFile.getAbsolutePath());
for (File f : files) {
PDFmerger.addSource(f);
}
PDFmerger.mergeDocuments(MemoryUsageSetting.setupTempFileOnly()); {code}
We also encounter the problem using the CLI's pdfbox-app-2.0.22.jar and
pdfbox-app-3.0.3.jar.
We found that adding the following fixed the problem:
{code:java}
PDFmerger.setDocumentMergeMode(PDFMergerUtility.DocumentMergeMode.OPTIMIZE_RESOURCES_MODE);
{code}
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