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https://issues.apache.org/jira/browse/LUCENE-2504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909312#action_12909312
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Michael McCandless commented on LUCENE-2504:
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bq. I'm now getting many UnsupportedOperationExceptions (i.e. the search
process is using older comparators after calling setNextReader())
That's no good!
bq. One culprit is OneComparatorNonScoringCollector, and another is
OneComparatorFieldValueHitQueue I think.
Hmm I don't see the problem -- eg OneComparatorNonScoringCollector saves the
returned comparator from comparator.setNextReader.
Can you post the full exc?
> sorting performance regression
> ------------------------------
>
> Key: LUCENE-2504
> URL: https://issues.apache.org/jira/browse/LUCENE-2504
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Yonik Seeley
> Fix For: 4.0
>
> Attachments: LUCENE-2504.patch, LUCENE-2504.patch, LUCENE-2504.zip
>
>
> sorting can be much slower on trunk than branch_3x
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