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https://issues.apache.org/jira/browse/PDFBOX-1586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13646705#comment-13646705
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James Green commented on PDFBOX-1586:
-------------------------------------
Once the scratch file is guaranteed to be private then it can be safely closed.
I'm betting that whatever calls to get access to that scratch file is probably
buggy and maintaining references where the called PDDocument has fallen out of
scope. Essentially my patch merely prevents a crash it does not fix the
underlying problem of references to scratch files being made in error.
> IndexOutOfBoundsException when saving a document (at random)
> ------------------------------------------------------------
>
> Key: PDFBOX-1586
> URL: https://issues.apache.org/jira/browse/PDFBOX-1586
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.1
> Reporter: James Green
> Priority: Critical
>
> Getting the following stacktrace:
> org.apache.pdfbox.exceptions.COSVisitorException:
> java.lang.IndexOutOfBoundsException: Index: 28, Size: 0
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:1245)
> at org.apache.pdfbox.cos.COSStream.accept(COSStream.java:201)
> at org.apache.pdfbox.cos.COSObject.accept(COSObject.java:206)
> at org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:524)
> at org.apache.pdfbox.pdfwriter.COSWriter.doWriteBody(COSWriter.java:434)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:1056)
> at org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:496)
> at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1392)
> at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1157)
> at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1138)
> ...
> Caused by: java.lang.IndexOutOfBoundsException: Index: 28, Size: 0
> at java.util.ArrayList.rangeCheck(ArrayList.java:604)
> at java.util.ArrayList.get(ArrayList.java:382)
> at
> org.apache.pdfbox.io.RandomAccessBuffer.seek(RandomAccessBuffer.java:84)
> at
> org.apache.pdfbox.io.RandomAccessFileInputStream.read(RandomAccessFileInputStream.java:96)
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
> at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:1232)
> I'll add some context. We have a "data pipeline" in which a Windows Print
> Monitor sends postscript into a servlet which then uses GhostScript 9.05 to
> convert in-memory to PDF. This PDF is then loaded into PDFBox using
> PDDocument.load().
> At this point we split the original PDF into multiple smaller ones each of
> which is saved to a ByteArrayOutputStream. At the point of save() we are
> having serious reliability issues.
> Taking an original PDF from Ghostscript we have saved this into a unit test
> to replicate the problem without success. If we attempt to re-execute the
> pipeline to take the original PDF and split it, we get apparently random
> percentages of saved documents.
> For instance, on a 990 page document (text, no images), to be split into 990
> 1-page documents using Tomcat 7 with -Xmx=512m:
> Pass 1: 50% were saved, 50% ended with stack traces
> Pass 2: 100% were saved
> Pass 3: 100% were saved
> The same test with -Xmx=128m ended several times with just 1 document saved,
> the rest were stack traces.
> We have also seen this randomly hit a sample document consisting of four
> pages to be split into two two-page documents so it does not appear to be
> memory related. We also added code to catch the IndexOutOfBoundsException and
> make up to ten attempts to repeat, but it seems the save() either works the
> first time or not at all.
> We're thinking there are environmental factors here but we're now focused on
> getting this nailed. Any advice or assistance will be welcomed.
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