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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3377) TermOrdsIterator#lookup throws ArrayIndexOutOfBoundsException
Date Wed, 17 Aug 2011 12:22:44 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13086259#comment-13086259
] 

Michael McCandless commented on LUCENE-3377:
--------------------------------------------

I think we should record which IR instance the DTO.TermOrdsIterator was created on, and then
don't reuse the passed instance if it came from a different IR?

Actually we should probably just hold onto & compare the IR.getCoreCacheKey().

> TermOrdsIterator#lookup throws ArrayIndexOutOfBoundsException
> -------------------------------------------------------------
>
>                 Key: LUCENE-3377
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3377
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: 4.0
>            Reporter: Martijn van Groningen
>            Priority: Minor
>
> TermOrdsIterator's lookup method can throw an ArrayIndexOutOfBoundsException if reuse
argument is reused acros segments. 
> Example collector:
> {code}
> private DocTermOrds.TermOrdsIterator reuse = null;
> public void collect(int doc) throws IOException {
>     ...
>     reuse = docTermOrds.lookup(doc, reuse);
>     ...
> }
> public void setNextReader(IndexReader.AtomicReaderContext context) throws IOException
{
>     docTermOrds = FieldCache.DEFAULT.getDocTermOrds(context.reader, field);
>     ....
> }
> {code}
> If reuse argument is always null exception doesn't occur. 

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