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https://issues.apache.org/jira/browse/LUCENE-2501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879379#action_12879379
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Michael McCandless commented on LUCENE-2501:
--------------------------------------------
Hmmm, not good. Can you boil this down to a smallish test case?
level should never be > 9, because nextLevelArray[*] is no greater than 9.
Something more serious is up...
> ArrayIndexOutOfBoundsException in ByteBlockPool.allocSlice
> ----------------------------------------------------------
>
> Key: LUCENE-2501
> URL: https://issues.apache.org/jira/browse/LUCENE-2501
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 3.0.1
> Reporter: Tim Smith
>
> I'm seeing the following exception during indexing:
> {code}
> 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
> {code}
> This seems to be caused by the following code:
> {code}
> final int level = slice[upto] & 15;
> final int newLevel = nextLevelArray[level];
> final int newSize = levelSizeArray[newLevel];
> {code}
> 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
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