Issues with Requested page with index 1728 was not written before.

[Leon Tian]

Hi

I met below exception when trying to generate PDF files. I use the BatangChe 
TrueTypeFont to generate PDF for Korean language. I have a batch of 100 files 
to process and it usually starts to giving this error towards the end.

[err] java.io.IOException: Requested page with index 1728 was not written 
before.
[err]     at org.apache.pdfbox.io.ScratchFile.readPage(ScratchFile.java:303)
[err]     at 
org.apache.pdfbox.io.ScratchFileBuffer.read(ScratchFileBuffer.java:460)
[err]     at java.io.InputStream.read(Unknown Source)
[err]     at 
org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:133)
[err]     at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:73)
[err]     at org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:69)
[err]     at 
org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:162)
[err]     at 
org.apache.pdfbox.pdmodel.common.PDStream.createInputStream(PDStream.java:235)
[err]     at 
org.apache.pdfbox.pdmodel.common.PDStream.toByteArray(PDStream.java:499)
[err]     at 
org.apache.pdfbox.pdmodel.font.TrueTypeEmbedder.buildFontFile2(TrueTypeEmbedder.java:104)
[err]     at 
org.apache.pdfbox.pdmodel.font.TrueTypeEmbedder.subset(TrueTypeEmbedder.java:331)
[err]     at 
org.apache.pdfbox.pdmodel.font.PDType0Font.subset(PDType0Font.java:162)
[err]     at 
com.ibm.esh.bluemix.iol.pdf.PDFCreator.createPDF(IOLPDFCreator.java:227)


Here's the code that I use

    public byte[] createPDF(String[] text) throws IOLPDFException{
        byte[] pdfBytes = null;
        PDDocument sourceDoc = null;

        try {
            // get the source PDF template page
            sourceDoc = 
PDDocument.load(IOLPDFCreator.class.getResourceAsStream(sourcePath));
            PDPage templatePage = sourceDoc.getPage(0);

            // instantiate the target pdf file, if it has not been instantiated
            if (targetDoc == null) {
                targetDoc = new PDDocument();
            }

            if (font == null) {
                loadFont(targetDoc);
            }

            PDPageContentStream contents = null;

            int pageNum = 0;
            int rowNum = 0;

            for (int i=0; i< text.length; i++) {

                // Create a Pattern object based on regex for top page line
                Pattern rLine = Pattern.compile("PAGE : 0\\d\\d\\d");
                // Create matcher object.
                Matcher mLine = rLine.matcher(text[i]);

                //if page top line is found, initialize a new page
                if (mLine.find())  {
                    //if not the first page, close the previous page content 
stream
                    if (contents!=null) {
                        contents.close();
                    }
                    //get a blank template page imported
                    targetDoc.importPage(templatePage);
                    PDPage page = targetDoc.getPage(pageNum);
                    contents = new PDPageContentStream(targetDoc, page, 
AppendMode.APPEND, true, true);
                    rowNum = 0;
                    pageNum ++;
                    continue;
                }

                // write the text line onto the page
                contents.beginText();
                contents.setFont(font, size);
                contents.newLineAtOffset(x, y - rowNum*space);
                contents.showText(text[i]);
                contents.endText();
                rowNum++;
            }

            //close the last page content stream
            contents.close();

            //save the document and get the bytes
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            targetDoc.save(out);
            pdfBytes = out.toByteArray();

            return pdfBytes;

        } catch (IOException ie){
            System.out.println("IOException while creating pdf...");
            ie.printStackTrace();
            throw new PDFException("IOL createPDF encountered IOexception...");
        } catch (Exception ex) {
            ex.printStackTrace();
            throw new PDFException("IOL createPDF encountered exception...");
        } finally {
            //close both targetDoc and sourceDoc
            try {
                if (targetDoc != null) {
                    targetDoc.close();
                }
                if (sourceDoc != null) {
                    sourceDoc.close();
                }
            } catch (IOException ie){
                System.out.println("IOException while closing document...");
                ie.printStackTrace();
                throw new PDFException("IOL createPDF encountered 
IOexception...");
            }
        }

    }


Your help is appreciated!

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