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https://issues.apache.org/jira/browse/PDFBOX-4521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16822417#comment-16822417
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ASF subversion and git services commented on PDFBOX-4521:
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Commit 1857865 from Tilman Hausherr in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1857865 ]
PDFBOX-4521: avoid ClassCastException
> Missing Info value from file trailer: org.apache.pdfbox.cos.COSName cannot be
> cast to org.apache.pdfbox.cos.COSDictionary
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: PDFBOX-4521
> URL: https://issues.apache.org/jira/browse/PDFBOX-4521
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 2.0.15
> Reporter: Oliver Mannion
> Priority: Major
> Attachments: Editathon_cheat_sheet_(EN).pdf,
> Editathon_cheat_sheet_(EN)_MetaDefender.pdf
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> The following exception
> {code:java}
> Cause: java.lang.ClassCastException: org.apache.pdfbox.cos.COSName cannot be
> cast to org.apache.pdfbox.cos.COSDictionary at
> org.apache.pdfbox.pdmodel.PDDocument.getDocumentInformation(PDDocument.java:740)
> at org.apache.tika.parser.pdf.PDFParser.extractMetadata(PDFParser.java:242)
> at org.apache.tika.parser.pdf.PDFParser.parse(PDFParser.java:154) at
> org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) at
> org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) at
> org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:135){code}
> is generated by PDF documents that have no value in the file trailer for the
> {{Info}} key, eg:
> {code:java}
> << /Size 50/Root 8 0 R/Info /ID >>
> {code}
> According to the [PDF
> spec|http://wwwimages.adobe.com/www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/pdf_reference_1-7.pdf]
> the {{Info}} key is optional. PDFBox correctly handles the case when there
> is no {{Info}} key and no value is present, but in this case, the key is
> present but without a value.
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