[PDFBOX-4521] Missing Info value from file trailer: org.apache.pdfbox.cos.COSName cannot be cast to org.apache.pdfbox.cos.COSDictionary

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.15
• Fix Version/s: 2.0.16, 3.0.0 PDFBox
• Component/s: Parsing
• Assignee: Tilman Hausherr
• Reporter: Oliver Mannion
• Created: 20/Apr/19 08:55
• Updated: 28/Jun/19 04:39
• Resolved: 20/Apr/19 12:20

Description

The following exception

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)

is generated by PDF documents that have no value in the file trailer for the Info key, eg:

<< /Size 50/Root 8 0 R/Info /ID >>

According to the PDF spec 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.