[LUCENE-2501] ArrayIndexOutOfBoundsException in ByteBlockPool.allocSlice

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.1
• Fix Version/s: 3.6, 4.0-BETA, 6.0
• Component/s: core/index
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Tim Smith
• Created: 16/Jun/10 16:39
• Updated: 28/Aug/22 12:27
• Resolved: 06/Aug/12 09:32

Description

I'm seeing the following exception during indexing:

Caused by: java.lang.ArrayIndexOutOfBoundsException: 14
at org.apache.lucene.index.ByteBlockPool.allocSlice(ByteBlockPool.java:118)
at org.apache.lucene.index.TermsHashPerField.writeByte(TermsHashPerField.java:490)
at org.apache.lucene.index.TermsHashPerField.writeVInt(TermsHashPerField.java:511)
at org.apache.lucene.index.FreqProxTermsWriterPerField.writeProx(FreqProxTermsWriterPerField.java:104)
at org.apache.lucene.index.FreqProxTermsWriterPerField.newTerm(FreqProxTermsWriterPerField.java:120)
at org.apache.lucene.index.TermsHashPerField.add(TermsHashPerField.java:468)
at org.apache.lucene.index.DocInverterPerField.processFields(DocInverterPerField.java:174)
at org.apache.lucene.index.DocFieldProcessorPerThread.processDocument(DocFieldProcessorPerThread.java:246)
at org.apache.lucene.index.DocumentsWriter.updateDocument(DocumentsWriter.java:774)
at org.apache.lucene.index.DocumentsWriter.updateDocument(DocumentsWriter.java:757)
at org.apache.lucene.index.IndexWriter.updateDocument(IndexWriter.java:2085)
... 37 more

This seems to be caused by the following code:

    final int level = slice[upto] & 15;
    final int newLevel = nextLevelArray[level];
    final int newSize = levelSizeArray[newLevel];

this can result in "level" being a value between 0 and 14
the array nextLevelArray is only of size 10

i suspect the solution would be to either max the level to 10, or to add more entries to the nextLevelArray so it has 15 entries
however, i don't know if something more is going wrong here and this is just where the exception hits from a deeper issue