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https://issues.apache.org/jira/browse/LUCENE-4250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir resolved LUCENE-4250.
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Resolution: Fixed
Fix Version/s: 5.0
4.0
> PayloadFunction explains are trappy and duplicate the scoring
> -------------------------------------------------------------
>
> Key: LUCENE-4250
> URL: https://issues.apache.org/jira/browse/LUCENE-4250
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Fix For: 4.0, 5.0
>
> Attachments: LUCENE-4250.patch
>
>
> the default implementation is basically never useful:
> {code}
> result.setDescription("Unimpl Payload Function Explain");
> result.setValue(1);
> {code}
> Instead we should just do this:
> {code}
> result.setDescription(getClass().getSimpleName() + ".docScore()");
> result.setValue(docScore(docId, field, numPayloadsSeen, payloadScore));
> {code}
> And remove all the overriden impls in our Min/Max/Avg that just
> duplicate their scoring function.
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