Bernhard Altendorfer created LUCENE-7833:
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Summary: Returning minimum instead of maximum in
ToParentBlockJoinQuery.BlockJoinScorer.setScoreAndFreq
Key: LUCENE-7833
URL: https://issues.apache.org/jira/browse/LUCENE-7833
Project: Lucene - Core
Issue Type: Bug
Reporter: Bernhard Altendorfer
We recently upgraded our Elasticsearch cluster from 5.3 to 5.4 and found a bug
when we score nested documents.
I spent some time to check the code from Elasticsearch and Lucene and I found a
problem in ToParentBlockJoinQuery.BlockJoinScorer.setScoreAndFreq.
In the switch statement for the scoreMode in the case "Max" the function
Math.min is used and I guess it should be Math.max.
This would explain our problem in Elasticsearch because we see exactly the
problem that instead of the maximum the minimum is returned.
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