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https://issues.apache.org/jira/browse/LUCENE-9618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17235652#comment-17235652
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Haoyu Zhai commented on LUCENE-9618:
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I created a [PR|https://github.com/apache/lucene-solr/pull/2090] with a simple
test case to demonstrate the issue mentioned.
> Improve IntervalIterator.nextInterval's behavior/documentation/test
> -------------------------------------------------------------------
>
> Key: LUCENE-9618
> URL: https://issues.apache.org/jira/browse/LUCENE-9618
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/query
> Reporter: Haoyu Zhai
> Priority: Minor
> Time Spent: 10m
> Remaining Estimate: 0h
>
> I'm trying to play around with my own {{IntervalSource}} and found out that
> {{nextInterval}} method of IntervalIterator will be called sometimes even
> after {{nextDoc}}/ {{docID}}/ {{advance}} method returns NO_MORE_DOCS.
>
> After I dug a bit more I found that {{FilteringIntervalIterator.reset}} is
> calling an inner iterator's {{nextInterval}} regardless of what the result of
> {{nextDoc}}, and also most (if not all) existing {{IntervalIterator}}'s
> implementation do considered the case where {{nextInterval}} is called after
> {{nextDoc}} returns NO_MORE_DOCS.
>
> We should probably update the javadoc and test if the behavior is necessary.
> Or we should change the current implementation to avoid this behavior
> original email discussion thread:
> https://markmail.org/message/7itbwk6ts3bo3gdh
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