[jira] [Created] (PDFBOX-3721) PDFMergerUtility is throwing java.lang.OutOfMemoryError: Java heap space exception while trying to merge documents

["anil kumar (JIRA)" <ji...@apache.org>]

anil kumar created PDFBOX-3721:
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             Summary: PDFMergerUtility is throwing java.lang.OutOfMemoryError: Java heap space exception while trying to merge documents
                 Key: PDFBOX-3721
                 URL: https://issues.apache.org/jira/browse/PDFBOX-3721
             Project: PDFBox
          Issue Type: Bug
          Components: Utilities
    Affects Versions: 2.0.3
            Reporter: anil kumar
            Priority: Critical


My code snapshot is like this:

ByteArrayOutputStream mergedPdfStream = new ByteArrayOutputStream();
	PDFMergerUtility pdfMerger = new PDFMergerUtility();
pdfMerger.setDestinationStream(mergedPdfStream);	
//looping through whole list of documents
pdfMerger.addSource(new ByteArrayInputStream(bos.toByteArray()));
//loop ends
pdfMerger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());

I am getting below exception
java.lang.OutOfMemoryError: Java heap space
 at java.util.Arrays.copyOf(Arrays.java:3236)
 at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:118)
 at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93)
 at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:153)
 at org.apache.pdfbox.pdfwriter.COSStandardOutputStream.write(COSStandardOutputStream.java:129)
 at org.apache.pdfbox.io.IOUtils.copy(IOUtils.java:68)
 at org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:1193)
 at org.apache.pdfbox.cos.COSStream.accept(COSStream.java:383)
 at org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:530)
 at org.apache.pdfbox.pdfwriter.COSWriter.doWriteObjects(COSWriter.java:459)
 at org.apache.pdfbox.pdfwriter.COSWriter.doWriteBody(COSWriter.java:443)
 at org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:1088)
 at org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:419)
 at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1359)
 at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1246)
 at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1146)
 at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:280)
 
We tried to increase memory also, which will allows only few more documents. Soon after that, I am getting same exception.

is there any better solution to fix this.



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