Jim deVos created PDFBOX-3142:
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Summary: PDFMergerUtility generates result with blank pages for
certain source files.
Key: PDFBOX-3142
URL: https://issues.apache.org/jira/browse/PDFBOX-3142
Project: PDFBox
Issue Type: Bug
Components: Utilities
Affects Versions: 1.8.10
Environment: Ubuntu 14.04.3, java 1.8.0_66
Reporter: Jim deVos
My team uses PDFMergerUtility to attach cover pages to various pdfs . We
recently we tried utilizing a scratch file (e.g.
PDFMergerUtility.mergeNonSeq()) to cut down on the amount of RAM we are using.
This approach works for the majority of pdf's in our system, but some files
cause the merger utility to generate resultant pdf's with a blank page.
Specifically, the result pdf contains a blank page after the coverpage instead
of the first page of the second document sent to merger utility.
Whenever this problem occurs, we see the following line in our logs:
{{org.apache.pdfbox.pdfparser.NonSequentialPDFParser - Can't find the object 52
0 (origin offset 7187557)}}
I'll try to attach/link an example pdf soon, but currently I don't have
permission to redistribute any files that exhibit the problem. However,
here's a simple snippet that replicates the problem - it's pretty
straightforward.
{code}
@Test
public void testMergeNonSeq() throws IOException, COSVisitorException {
destinationPdf = new File(TMP_FOLDER, "result-nonseq.pdf");
PDFMergerUtility ut = new PDFMergerUtility();
RandomAccess ram = new RandomAccessFile(File.createTempFile("mergeram",
".bin"), "rw");
ut.addSource(coverpagePdf);
ut.addSource(documentPdf);
ut.setDestinationFileName(destinationPdf.getCanonicalPath());
ut.mergeDocumentsNonSeq(ram);
//the only automated way we have to tell that something went wrong is
to check the size of the result
assertThat("destination pdf should be larger than the original pdf",
destinationPdf.length(), is( greaterThan(documentPdf.length())));
}
{code}
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