Potential memory leak when saving PDF as PPTX

Aspose.PDF Product Family
1

Hi,

we are facing potential memory leak in aspose.pdf library when converting pdf to pptx. Looks like memory leak is outside JVM, as both heap and non-heap (inspected with native memory tracker) memory is stable during runtime.

Tested with aspose.pdf versions 22.2, 24.8
Reproducible both in linux and windows operating systems.

Code snippet:

private static final Executor EXECUTOR = Executors.newFixedThreadPool(3);

public static void main(String[] args) throws Exception {
    new com.aspose.pdf.License().setLicense(args[0]);
    for (int i = 0; i < 1000; i++) {
        CompletableFuture.runAsync(Pdf2PptxSimple::runExportTask, EXECUTOR);
    }
}

private static void runExportTask() {
    try {
        try (InputStream pdf = Pdf2PptxSimple.class.getClassLoader().getResourceAsStream("document.pdf")) {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            try (Document srcDoc = new Document(pdf)) {
                srcDoc.save(out, SaveFormat.Pptx);
                System.out.println(out.size());
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

With 2G heap limit (-Xmx2g) total memory usage:

  • after 100 exports ~3.5G
  • after 200 exports ~4.5G
  • after 450 exports ~7G

Please find the full working example and PDF document attached.
pdf2pptx.zip (125.2 KB)
document.pdf (503.7 KB)

2

@dfinsolutions

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): PDFJAVA-44321

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