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https://issues.apache.org/jira/browse/LUCENE-10544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17529875#comment-17529875
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Adrien Grand commented on LUCENE-10544:
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Right, conjunctions of high-frequency clauses that have few documents in common
have the same issue. In my opinion, a better solution that has less overhead
and would still support cancelling such slow queries consists of leveraging
{{BulkScorer#score}} to score small-ish ranges of doc IDs at a time.
Long-term I'd like ExitableDirectoryReader and other tooling to handle
cancellation/timeout to become mostly implementation details, and have proper
support directly on IndexSearcher (LUCENE-10151).
> Should ExitableTermsEnum wrap postings and impacts?
> ---------------------------------------------------
>
> Key: LUCENE-10544
> URL: https://issues.apache.org/jira/browse/LUCENE-10544
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Reporter: Greg Miller
> Priority: Major
>
> While looking into options for LUCENE-10151, I noticed that
> {{ExitableDirectoryReader}} doesn't actually do any timeout checking once you
> start iterating postings/impacts. It *does* create a {{ExitableTermsEnum}}
> wrapper when loading a {{{}TermsEnum{}}}, but that wrapper doesn't do
> anything to wrap postings or impacts. So timeouts will be enforced when
> moving to the "next" term, but not when iterating the postings/impacts
> associated with a term.
> I think we ought to wrap the postings/impacts as well with some form of
> timeout checking so timeouts can be enforced on long-running queries. I'm not
> sure why this wasn't done originally (back in 2014), but it was questioned
> back in 2020 on the original Jira SOLR-5986. Does anyone know of a good
> reason why we shouldn't enforce timeouts in this way?
> Related, we may also want to wrap things like {{seekExact}} and {{seekCeil}}
> given that only {{next}} is being wrapped currently.
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