[
https://issues.apache.org/jira/browse/LUCENE-10544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17572859#comment-17572859
]
Adrien Grand commented on LUCENE-10544:
---------------------------------------
I guess my only concern about this is that there are likely users who rely on
the fact that ExitableDirectoryReader doesn't wrap postings in order to get
good performance for their queries (by not adding a wrapper on every postings
list) while still enabling timeouts via a collector or BulkScorer approach
(e.g. Elasticsearch is in this case).
I would suggest that we wait for IndexSearcher's timeout support to be more
complete (LUCENE-10641) before doing this, so that users never have to wrap
with ExitableDirectoryReader themselves and can instead rely fully on
IndexSearcher doing the right thing.
> 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.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org
For additional commands, e-mail: issues-h...@lucene.apache.org
