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https://issues.apache.org/jira/browse/PDFBOX-809?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Hewson resolved PDFBOX-809.
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Resolution: Won't Fix
Only PDDocument is thread safe. No other classes should be retained for longer
than the lifetime of the PDDocument which they came from.
> Reusing PDFonts causing COSVisitorException.
> --------------------------------------------
>
> Key: PDFBOX-809
> URL: https://issues.apache.org/jira/browse/PDFBOX-809
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.2.1
> Environment: JDK 1.6.0_21, WIndows XP 32 Bit.
> Reporter: MH
>
> I try to reuse custom fonts and cache the PDFont objects in a
> ConcurrentHashMap. But when I try to reuse those fonts, I get a
> org.apache.pdfbox.exceptions.COSVisitorException: Das Handle ist ungültig
> PDTrueTypeFont.loadTTF() has a PDDocument as the first parameter. So I guess,
> the font is somehow linked with the font and reusing such a font for another
> PDDocument causing this exception (?).
> When processing multiple documents with the very same fonts, those TTF fonts
> get loaded over and over again from the system. Why is the font linked with
> the document? Would it be possible to make PDFont independent from PDDocument
> (why not)?
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