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https://issues.apache.org/jira/browse/LUCENE-10151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17567329#comment-17567329
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ASF subversion and git services commented on LUCENE-10151:
----------------------------------------------------------

Commit 5cd6eda8caba5a93eeaf60215885ec3171707449 in lucene's branch 
refs/heads/branch_9x from Michael Sokolov
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=5cd6eda8cab ]

CHANGES entry for LUCENE-10151


> Add timeout support to IndexSearcher
> ------------------------------------
>
>                 Key: LUCENE-10151
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10151
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>            Reporter: Greg Miller
>            Priority: Minor
>             Fix For: 9.3
>
>          Time Spent: 3h 40m
>  Remaining Estimate: 0h
>
> I'd like to explore adding optional "timeout" capabilities to 
> {{IndexSearcher}}. This would enable users to (optionally) specify a maximum 
> time budget for search execution. If the search "times out", partial results 
> would be available.
> This idea originated on the dev list (thanks [~jpountz] for the suggestion). 
> Thread for reference: 
> [http://mail-archives.apache.org/mod_mbox/lucene-dev/202110.mbox/%3CCAL8PwkZdNGmYJopPjeXYK%3DF7rvLkWon91UEXVxMM4MeeJ3UHxQ%40mail.gmail.com%3E]
>  
> A couple things to watch out for with this change:
>  # We want to make sure it's robust to a two-phase query evaluation scenario 
> where the "approximate" step matches a large number of candidates but the 
> "confirmation" step matches very few (or none). This is a particularly tricky 
> case.
>  # We want to make sure the {{TotalHits#Relation}} reported by {{TopDocs}} is 
> {{GREATER_THAN_OR_EQUAL_TO}} if the query times out
>  # We want to make sure it plays nice with the {{LRUCache}} since it iterates 
> the query to pre-populate a {{BitSet}} when caching. That step shouldn't be 
> allowed to overrun the timeout. The proper way to handle this probably needs 
> some thought.



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