Fix NDCG for empty search results #29267
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Fixes and edge case where DiscountedCumulativeGain can return NaN as result of the quality metric calculation. This can happen when the search result set is empty and normalization is used. We should return 0 in this case. Also adding related unit tests to the other two metrics.
cbuescher
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:Search Relevance/Ranking
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Pinging @elastic/es-search-aggs |
cbuescher
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Apr 3, 2018
Fixes and edge case where DiscountedCumulativeGain can return NaN as result of the quality metric calculation. This can happen when the search result set is empty and normalization is used. We should return 0 in this case. Also adding related unit tests to the other two metrics.
jasontedor
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* master: Reindex: Fix error in delete-by-query rest spec (elastic#29318) Improve similarity integration. (elastic#29187) Fix some query extraction bugs. (elastic#29283) [Docs] Correct experimental note formatting Move Nullable into core (elastic#29341) [Docs] Update getting-started.asciidoc (elastic#29294) Elasticsearch 6.3.0 is now on Lucene 7.3. [DOCS] Refer back to index API for full-document updates in _update API section (elastic#28677) Fix missing comma in ingest-node.asciidoc (elastic#29343) Improve exception handling on TransportMasterNodeAction (elastic#29314) Don't break allocation if resize source index is missing (elastic#29311) Use fixture to test repository-s3 plugin (elastic#29296) Fix NDCG for empty search results (elastic#29267) Pass through script params in scripted metric agg (elastic#29154) Fix Eclipse build. Upgrade to lucene-7.3.0-snapshot-98a6b3d. (elastic#29298) Painless: Remove extraneous INLINE constant. (elastic#29340)
jasontedor
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Apr 3, 2018
* master: Build: Fix Java9 MR build (elastic#29312) Reindex: Fix error in delete-by-query rest spec (elastic#29318) Improve similarity integration. (elastic#29187) Fix some query extraction bugs. (elastic#29283) [Docs] Correct experimental note formatting Move Nullable into core (elastic#29341) [Docs] Update getting-started.asciidoc (elastic#29294) Elasticsearch 6.3.0 is now on Lucene 7.3. [DOCS] Refer back to index API for full-document updates in _update API section (elastic#28677) Fix missing comma in ingest-node.asciidoc (elastic#29343) Improve exception handling on TransportMasterNodeAction (elastic#29314) Don't break allocation if resize source index is missing (elastic#29311) Use fixture to test repository-s3 plugin (elastic#29296) Fix NDCG for empty search results (elastic#29267) Pass through script params in scripted metric agg (elastic#29154) Fix Eclipse build. Upgrade to lucene-7.3.0-snapshot-98a6b3d. (elastic#29298) Painless: Remove extraneous INLINE constant. (elastic#29340) Remove HTTP max content length leniency (elastic#29337) Begin moving XContent to a separate lib/artifact (elastic#29300)
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Fixes and edge case where DiscountedCumulativeGain can return NaN as
result of the quality metric calculation. This can happen when the
search result set is empty and normalization is used. We should return 0
in this case. Also adding related unit tests to the other two metrics.