[PDFBOX-2824] ArrayIndexOutOfBoundsException in GlyfSimpleDescript.readFlags() when multithreading

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: FontBox
• Labels: multithreading
• Assignee: John Hewson
• Reporter: Tilman Hausherr
• Created: 04/Jun/15 19:27
• Updated: 17/Mar/16 19:06
• Resolved: 12/Jun/15 18:40

Description

From Kenneth K. in the mailing list:

I have a client application that convert pdf documents into single page tiff images. Since the user export large quantities of documents I use a multithreaded approach. Each thread loads it own document and converts the pages one by one.
The pdf file is serialized to the client thread and then each thread executes the following code. If I only use 1 thread there is no problem. I checked to make sure objects are shared between threads.

            docin = PDDocument.load(new ByteArrayInputStream(documentResult.getImage().getContent()),true);
            if(null==docin)
              throw new Exception("Invalid PDF document or an occured during retrieval");
               int numPages = docin.getNumberOfPages();
                     String strPath = getPath(numPages);
                     int iPage = 0;
            PDFRenderer renderer = new PDFRenderer(docin);
            for (int i=0;i<numPages;i++)
            {
              PDPage page = docin.getPage(i);
              PDRectangle rect = page.getMediaBox();
              BufferedImage pageImage = null;
              pageImage = renderer.renderImageWithDPI(i, 200f, ImageType.BINARY);
              ...
            }

Array index out of range: 8
       at org.apache.fontbox.ttf.GlyfSimpleDescript.readFlags(GlyfSimpleDescript.java:202)
       at org.apache.fontbox.ttf.GlyfSimpleDescript.<init>(GlyfSimpleDescript.java:77)
       at org.apache.fontbox.ttf.GlyphData.initData(GlyphData.java:58)
       at org.apache.fontbox.ttf.GlyphTable.getGlyph(GlyphTable.java:161)
       at org.apache.pdfbox.rendering.TTFGlyph2D.getPathForGID(TTFGlyph2D.java:140)
       at org.apache.pdfbox.rendering.TTFGlyph2D.getPathForCharacterCode(TTFGlyph2D.java:92)
       at org.apache.pdfbox.rendering.PageDrawer.drawGlyph2D(PageDrawer.java:333)
       at org.apache.pdfbox.rendering.PageDrawer.showFontGlyph(PageDrawer.java:314)
       at org.apache.pdfbox.contentstream.PDFStreamEngine.showGlyph(PDFStreamEngine.java:731)
       at org.apache.pdfbox.contentstream.PDFStreamEngine.showText(PDFStreamEngine.java:690)
       at org.apache.pdfbox.rendering.PageDrawer.showText(PageDrawer.java:296)
       at org.apache.pdfbox.contentstream.PDFStreamEngine.showTextStrings(PDFStreamEngine.java:600)
       at org.apache.pdfbox.contentstream.operator.text.ShowTextAdjusted.process(ShowTextAdjusted.java:38)
       at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:802)
       at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:464)
       at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:438)
       at org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:149)
       at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:179)
       at org.apache.pdfbox.rendering.PDFRenderer.renderPage(PDFRenderer.java:205)
       at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:136)
       at org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:95)
       at org.ilsos.cm.export.client.rmi.workers.Pdf2SinglePageTiff.processResult(Pdf2SinglePageTiff.java:142)
       at org.ilsos.cm.export.client.rmi.ExportWorker.run(ExportWorker.java:72)
       at java.lang.Thread.run(Thread.java:784)

Issue Links

• duplicates: PDFBOX-2439 [PATCH] ArrayIndexOutOfBoundsException in multithreaded system
• relates to: TIKA-1737 PDFBox 1.8.10 is still a basket case