Dawn created SOLR-14607:
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Summary: 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
Security Level: Public (Default Security Level. Issues are Public)
Components: contrib - LTR
Affects Versions: master (9.0)
Reporter: Dawn
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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