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Date: Wed, 23 Jun 2010 09:02:49 -0400 (EDT)
From: "Tim Smith (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-2501) ArrayIndexOutOfBoundsException in
 ByteBlockPool.allocSlice
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    [ https://issues.apache.org/jira/browse/LUCENE-2501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12881675#action_12881675 ] 

Tim Smith commented on LUCENE-2501:
-----------------------------------

I've been informed that this exception is still happening

however, whenever index tracing is turned on, it never seems to occur (extra logging seems to be preventing some lower level synchronization issue from surfacing)


> 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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