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Posted to issues@solr.apache.org by "Jan Høydahl (Jira)" <ji...@apache.org> on 2021/12/10 13:14:00 UTC
[jira] [Commented] (SOLR-14607) LTR Query, timeAllowed parameter causes a timeout exception with no result
[ https://issues.apache.org/jira/browse/SOLR-14607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17457140#comment-17457140 ]
Jan Høydahl commented on SOLR-14607:
------------------------------------
Reviving stale discussion. I have not spent much time on this, but appreciate the thorough scenario/possibility layout by Christine. Makes it easier to chip in from the sideline.
Sounds to me like any of 0, 1, 6 would be better than the current behavior :)
> LTR Query, timeAllowed parameter causes a timeout exception with no result
> --------------------------------------------------------------------------
>
> Key: SOLR-14607
> URL: https://issues.apache.org/jira/browse/SOLR-14607
> Project: Solr
> Issue Type: Improvement
> Components: contrib - LTR
> Affects Versions: main (9.0)
> Reporter: Dawn
> Priority: Minor
> Attachments: SOLR-14607-poc.patch
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> When using the LTR, open timeAllowed parameter, LTR feature of query may call 'ExitableFilterAtomicReader.CheckAndThrow' timeout checks.
> If a timeout occurs at this point, the exception ExitingReaderException is thrown, Lead to null result.
> Exception information:
> {code:java}
> The request took too long to iterate over terms. Timeout: timeoutAt: 50321611131050 (System.nanoTime(): 50321639573838), TermsEnum=org.apache.lucene.codecs.blocktree.SegmentTermsEnum@62eaeeaa
> {code}
>
> Can hold this exception in the LTR, returning partial results rather than null.
> This exception occurs in two places:
> 1. 'LTRScoringQuery.CreateWeight' or 'LTRScoringQuery.createWeightsParallel'. Here is the loading stage, timeout directly end is acceptable.
> 2. 'ModelWeight.scorer'. This is a stage that evaluates each Doc and can catch the exception, returns the computed document.
>
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