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https://issues.apache.org/jira/browse/PDFBOX-2822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14568701#comment-14568701
 ] 

Tilman Hausherr commented on PDFBOX-2822:
-----------------------------------------

Are you building from source? If yes, does this work?
{code}
        // find a unique key
        String key;
        int n = dict.keySet().size();
        do
        {
            ++n;
            key = prefix + n;
        }
        while (dict.containsKey(key));
        return COSName.getPDFName(key);
{code}

> infinite loop of searching for a key in PDResources
> ---------------------------------------------------
>
>                 Key: PDFBOX-2822
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2822
>             Project: PDFBox
>          Issue Type: Bug
>          Components: PDModel
>    Affects Versions: 2.0.0
>            Reporter: Konstantin Kakunin
>         Attachments: Acro6JSGuide.pdf, pdfmain_svg.java
>
>
> error in code of class - org.apache.pdfbox.pdmodel.PDResources
> {code}
>     private COSName createKey(COSName kind, String prefix)
>     {
>         COSDictionary dict = 
> (COSDictionary)resources.getDictionaryObject(kind);
>         if (dict == null)
>         {
>             return COSName.getPDFName(prefix + 1);
>         }
>         // find a unique key
>         String key;
>         do
>         {
>             key = prefix + (dict.keySet().size() + 1);
>         }
>         while (dict.containsKey(key));    <--------------- infinite loop of 
> searching for a key
>         return COSName.getPDFName(key);
>     }
> {code}
> my test code:
> {code}
> public class pdfmain_svg {
>       public static void main(String[] args) throws Exception {
>               System.out.println("hello");
>               PDDocument document = PDDocument.load(new File(
>                               "d:\\Project\\pdfbox-image\\Acro6JSGuide.pdf"));
>               float fontSize = 10f;
>               PDFont font = PDType0Font.load(document, new File(
>                               "c:\\Windows\\Fonts\\Arial.TTF"));
>               for (int pageIndex = 0; pageIndex < 
> document.getNumberOfPages(); pageIndex++) {
>                       System.out.println("page index = " + pageIndex);
>                       PDPage page = document.getPage(pageIndex);  
>                       PDPageContentStream contentStream = new 
> PDPageContentStream(
>                                       document, page, true, true);
>                       contentStream.setFont(font, fontSize); 
> <---------------- hang on page 6
>                       contentStream.setNonStrokingColor(Color.LIGHT_GRAY);
>                       contentStream.beginText();
>                       contentStream.newLineAtOffset(100, 100);
>                       contentStream.showText("Test printing");
>                       contentStream.endText();
>                       contentStream.close();
>               }
>               File f = new File("d:\\work\\kostya.pdf");
>               document.save(f);
>               document.close();
>               System.out.println("f=" + f.getAbsolutePath() + ": " + 
> f.exists());
>       }
> }
> {code}



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