[PDFBOX-5479] PDFTextStripper needs 1GB heap for a 3.6 MB pdf

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.0.26
• Component/s: Text extraction
• Environment: JDK11.0.2 on MacOS 12.4
• Assignee: Unassigned
• Reporter: Manfred Schauer
• Created: 21/Jul/22 22:23
• Updated: 15/Dec/23 11:10

Description

Extracting text from the attached x.pdf:

PDDocument pdDocument = PDDocument.load(new File("/tmp/x.pdf"));
PDFTextStripper stripper = new PDFTextStripper();
stripper.getText(pdDocument);

succeeds with -Xmx1G but throws OOME with -Xmx900m

Heapdump shows 2923 instances of TrueTypeFont, PDRessources.cache contains SoftReferences to lots of fonts keyed by different COSObjects;