[PDFBOX-5072] java.lang.IndexOutOfBoundsException

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.22
• Fix Version/s: 2.0.23, 3.0.0 PDFBox
• Component/s: PDModel, Utilities
• Assignee: Tilman Hausherr
• Reporter: Thomas B.
• Created: 06/Jan/21 11:28
• Updated: 07/Jan/22 19:25
• Resolved: 07/Jan/21 18:21

Description

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.

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)

Unfortunately, I can't share the document that reproduce the issue.

I tried the same approach to fix it :

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);
....

But I'm getting the IOException :

Caused by: java.io.IOException: Expected string, found COSDictionary{[...] in name tree at index 0

And indeed, namesArray contains a COSObject at first index :

 

Issue Links

• is duplicated by: PDFBOX-5357 java.lang.IndexOutOfBoundsException
• relates to: PDFBOX-4969 java.lang.IndexOutOfBoundsException