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Posted to solr-user@lucene.apache.org by Ashwin Ramesh <as...@canva.com.INVALID> on 2020/05/14 08:38:18 UTC

Solr 7.4 - LTR reranker not adhering by Elevate Plugin

Hi everybody,

We are running a query with both elevateIds=1,2,3 & a reranker phase using
LTR plugin.

We noticed that the results do not return in the expected order - per the
elevateIds param.
Example LTR rq param {!ltr.model=foo reRankDocs=250 efi.query=$q}

When I used the standard reranker ({!rerank reRankQuery=$titleQuery
reRankDocs=1000 reRankWeight=3}) , it did adhere.

I assumed it's because the elevate plugin runs before the reranker (LTR).
However I'm finding it hard to confirm. The model is a linear model.

Is this expected behaviour?

Regards,

Ash

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