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Posted to issues@lucene.apache.org by "Adrien Grand (Jira)" <ji...@apache.org> on 2021/06/14 05:57:00 UTC

[jira] [Commented] (LUCENE-10001) Make CollectionTerminatedException handling in MultiCollector configurable

    [ https://issues.apache.org/jira/browse/LUCENE-10001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17362719#comment-17362719 ] 

Adrien Grand commented on LUCENE-10001:
---------------------------------------

When would it be desirable that terminating collection on a collector also terminates collection on other collectors that are wrapped under the same MultiCollector? This sounds counter-intuitive to me as only the collector itself can know when it has visited all the hits it needs? I also don't like that collectors would return different results depending on what other collectors are wrapped under the same MultiCollector?

> Make CollectionTerminatedException handling in MultiCollector configurable
> --------------------------------------------------------------------------
>
>                 Key: LUCENE-10001
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10001
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>    Affects Versions: main (9.0)
>            Reporter: Greg Miller
>            Assignee: Greg Miller
>            Priority: Minor
>
> In LUCENE-6772, {{MultiCollector}} was modified to continue collecting against other leaf collectors that had not thrown a {{CollectionTerminatedException}} in cases where another one does. It would be nice if this behavior could be configurable. Some use-cases might actually want to early terminate all leaf collectors as soon as one signals early termination.
> We could add a configurable option to the {{MultiCollector#wrap}} factory methods that allows users to specify the behavior they want.



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