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https://issues.apache.org/jira/browse/PDFBOX-5072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17260055#comment-17260055
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Tilman Hausherr commented on PDFBOX-5072:
-----------------------------------------
Likely a bug in the software that created the PDF.
What you could try is to open the file in Adobe Reader, save it, and try again
with that one. Adobe sometimes corrects bad files.
> java.lang.IndexOutOfBoundsException
> -----------------------------------
>
> Key: PDFBOX-5072
> URL: https://issues.apache.org/jira/browse/PDFBOX-5072
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel, Utilities
> Affects Versions: 2.0.22
> Reporter: Thomas B.
> Priority: Critical
> Fix For: 2.0.23, 3.0.0 PDFBox
>
> Attachments: image-2021-01-06-14-56-41-433.png
>
>
> I'm having a similar issue that have been fixed in PDFBOX-4969.
> In my case, the IndexOutOfBoundsException occurs inside PDNameTreeNode, and
> not inside PDNumberTreeNode.
> {code:java}
> java.lang.IndexOutOfBoundsException: Index: 81, Size: 81 at
> java.util.ArrayList.rangeCheck(ArrayList.java:653) at
> java.util.ArrayList.get(ArrayList.java:429) at
> org.apache.pdfbox.cos.COSArray.getObject(COSArray.java:188) at
> org.apache.pdfbox.pdmodel.common.PDNameTreeNode.getNames(PDNameTreeNode.java:272)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.getIDTreeAsMap(PDFMergerUtility.java:1036)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.getIDTreeAsMap(PDFMergerUtility.java:1051)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.mergeIDTree(PDFMergerUtility.java:1008)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.appendDocument(PDFMergerUtility.java:877)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.legacyMergeDocuments(PDFMergerUtility.java:459)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:346)
> {code}
> Unfortunately, I can't share the document that reproduce the issue.
> I tried the same approach to fix it :
> {code:java}
> public Map<String, T> getNames() throws IOException
> {
> COSArray namesArray = node.getCOSArray(COSName.NAMES);
> if( namesArray != null )
> {
> Map<String, T> names = new LinkedHashMap<String, T>();
> if (namesArray.size() % 2 != 0)
> {
> LOG.warn("Numbers array has odd size: " + namesArray.size());
> }
> for (int i = 0; i + 1 < namesArray.size(); i += 2)
> {
> COSBase base = namesArray.getObject(i);
> if (!(base instanceof COSString))
> {
> throw new IOException("Expected string, found " + base + " in name
> tree at index " + i);
> ....{code}
> But I'm getting the IOException :
> {code:java}
> Caused by: java.io.IOException: Expected string, found COSDictionary{[...] in
> name tree at index 0
> {code}
> And indeed, _namesArray_ contains a COSObject at first index :
> !image-2021-01-06-14-56-41-433.png!
>
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