[jira] [Created] (PDFBOX-4649) High CPU load an memory usage, when converting PDF to Image

["Willie Chieukam (Jira)" <ji...@apache.org>]

Willie Chieukam created PDFBOX-4649:
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             Summary: High CPU load an memory usage, when converting PDF to Image
                 Key: PDFBOX-4649
                 URL: https://issues.apache.org/jira/browse/PDFBOX-4649
             Project: PDFBox
          Issue Type: Bug
          Components: Rendering
    Affects Versions: 2.0.16
            Reporter: Willie Chieukam
         Attachments: 331577-5_b_19ez1.pdf, 332699-5_c_19ez7.pdf, 335520-5_c_19ezb.pdf, 335521-5_c_19ezd.pdf

Hello!

we are running a business web application, that is using pdfbox to convert
pdf-files to images using using pdfRenderer.renderImageWithDPI(parameters).

When we try to convert the attached pdf, the CPU load of tomcat is raising
and it seems, that the process hangs. The tomcat process is no more responsive and we get an memory overflow. Also the server load is very high meanwhile.

We are using

+ org.apache.pdfbox:pdfbox v 2.0.16
+ org.apache.pdfbox:pdfbox-tools v 2.0.16
+ org.apache.pdfbox:jbig2-imageio:3.0.2

Our Code looks like this:

{code}
    public void saveImageFromPDF(Path filePath, Path imagePath, Integer IMAGE_DPI, Float IMAGE_QUALITY) {
        try (PDDocument pddocument = PDDocument.load(Files.newInputStream(filePath, StandardOpenOption.READ))) {
            PDFRenderer pdfRenderer = new PDFRenderer(pddocument);

            for (Integer i = 0; i < pddocument.getNumberOfPages(); i++) {
                try (OutputStream outputStream = documentServiceUtility
                        .getFileOutputStream(imagePath.resolve(Integer.toString(i) + "." + IMAGE_FILE_EXTENSION))) {

                    BufferedImage bufferedImage = pdfRenderer.renderImageWithDPI(i, IMAGE_DPI, ImageType.BINARY);
                    ImageIOUtil.writeImage(bufferedImage, IMAGE_FILE_EXTENSION, outputStream, IMAGE_DPI, IMAGE_QUALITY);
                    LOG.debug("Image of document {} successfully saved.",
                            imagePath.resolve(Integer.toString(i) + "." + IMAGE_FILE_EXTENSION));
                } catch (Throwable ex) {
                    throw new NiehoffPDDocumentHanderException(filePath, ex);
                }
            }
        } catch (Exception e) {
            throw new NiehoffPDDocumentHanderException(filePath, e);
        }
    }
{code}

Line throwing the exception

*{color:red}BufferedImage bufferedImage = pdfRenderer.renderImageWithDPI(i, IMAGE_DPI, ImageType.BINARY);{color}*
 
Do you have an idea, how to prevent this?

Thank you very much and best regards,
Willie




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